DataGridViewComboBoxColumn.cs source code in C# .NET

                        
Code:
                         / Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / WinForms / Managed / System / WinForms / DataGridViewComboBoxColumn.cs / 1 / DataGridViewComboBoxColumn.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Windows.Forms 
{ 
    using System;
    using System.Text; 
    using System.ComponentModel;
    using System.Diagnostics;
    using System.Drawing;
    using System.Drawing.Design; 
    using System.Globalization;
 
    ///  
    [
        Designer("System.Windows.Forms.Design.DataGridViewComboBoxColumnDesigner, " + AssemblyRef.SystemDesign), 
        ToolboxBitmapAttribute(typeof(DataGridViewComboBoxColumn), "DataGridViewComboBoxColumn.bmp")
    ]
    public class DataGridViewComboBoxColumn : DataGridViewColumn
    { 
        private static Type columnType = typeof(DataGridViewComboBoxColumn);
 
        ///  
        public DataGridViewComboBoxColumn() : base(new DataGridViewComboBoxCell())
        { 
            ((DataGridViewComboBoxCell)base.CellTemplate).TemplateComboBoxColumn = this;
        }

        ///  
        [
            Browsable(true), 
            DefaultValue(true), 
            SRCategory(SR.CatBehavior),
            SRDescription(SR.DataGridView_ComboBoxColumnAutoCompleteDescr) 
        ]
        public bool AutoComplete
        {
            get 
            {
                if (this.ComboBoxCellTemplate == null) 
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                } 
                return this.ComboBoxCellTemplate.AutoComplete;
            }
            set
            { 
                if (this.AutoComplete != value)
                { 
                    this.ComboBoxCellTemplate.AutoComplete = value; 
                    if (this.DataGridView != null)
                    { 
                        DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows;
                        int rowCount = dataGridViewRows.Count;
                        for (int rowIndex = 0; rowIndex < rowCount; rowIndex++)
                        { 
                            DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex);
                            DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell; 
                            if (dataGridViewCell != null) 
                            {
                                dataGridViewCell.AutoComplete = value; 
                            }
                        }
                    }
                } 
            }
        } 
 
        /// 
        [ 
            Browsable(false),
            DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ]
        public override DataGridViewCell CellTemplate 
        {
            get 
            { 
                return base.CellTemplate;
            } 
            set
            {
                DataGridViewComboBoxCell dataGridViewComboBoxCell = value as DataGridViewComboBoxCell;
                if (value != null && dataGridViewComboBoxCell == null) 
                {
                    throw new InvalidCastException(SR.GetString(SR.DataGridViewTypeColumn_WrongCellTemplateType, "System.Windows.Forms.DataGridViewComboBoxCell")); 
                } 
                base.CellTemplate = value;
                if (value != null) 
                {
                    dataGridViewComboBoxCell.TemplateComboBoxColumn = this;
                }
            } 
        }
 
        private DataGridViewComboBoxCell ComboBoxCellTemplate 
        {
            get 
            {
                return (DataGridViewComboBoxCell) this.CellTemplate;
            }
        } 

        ///  
        [ 
            DefaultValue(null),
            SRCategory(SR.CatData), 
            SRDescription(SR.DataGridView_ComboBoxColumnDataSourceDescr),
            RefreshProperties(RefreshProperties.Repaint),
            AttributeProvider(typeof(IListSource)),
        ] 
        public object DataSource
        { 
            get 
            {
                if (this.ComboBoxCellTemplate == null) 
                {
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                }
                return this.ComboBoxCellTemplate.DataSource; 
            }
            set 
            { 
                if (this.ComboBoxCellTemplate == null)
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                }
                this.ComboBoxCellTemplate.DataSource = value;
                if (this.DataGridView != null) 
                {
                    DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows; 
                    int rowCount = dataGridViewRows.Count; 
                    for (int rowIndex = 0; rowIndex < rowCount; rowIndex++)
                    { 
                        DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex);
                        DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell;
                        if (dataGridViewCell != null)
                        { 
                            dataGridViewCell.DataSource = value;
                        } 
                    } 
                    this.DataGridView.OnColumnCommonChange(this.Index);
                } 
            }
        }

        ///  
        [
            DefaultValue(""), 
            SRCategory(SR.CatData), 
            SRDescription(SR.DataGridView_ComboBoxColumnDisplayMemberDescr),
            TypeConverterAttribute("System.Windows.Forms.Design.DataMemberFieldConverter, " + AssemblyRef.SystemDesign), 
            Editor("System.Windows.Forms.Design.DataMemberFieldEditor, " + AssemblyRef.SystemDesign, typeof(System.Drawing.Design.UITypeEditor))
        ]
        public string DisplayMember
        { 
            get
            { 
                if (this.ComboBoxCellTemplate == null) 
                {
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired)); 
                }
                return this.ComboBoxCellTemplate.DisplayMember;
            }
            set 
            {
                if (this.ComboBoxCellTemplate == null) 
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                } 
                this.ComboBoxCellTemplate.DisplayMember = value;
                if (this.DataGridView != null)
                {
                    DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows; 
                    int rowCount = dataGridViewRows.Count;
                    for (int rowIndex = 0; rowIndex < rowCount; rowIndex++) 
                    { 
                        DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex);
                        DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell; 
                        if (dataGridViewCell != null)
                        {
                            dataGridViewCell.DisplayMember = value;
                        } 
                    }
                    this.DataGridView.OnColumnCommonChange(this.Index); 
                } 
            }
        } 

        /// 
        [
            DefaultValue(DataGridViewComboBoxDisplayStyle.DropDownButton), 
            SRCategory(SR.CatAppearance),
            SRDescription(SR.DataGridView_ComboBoxColumnDisplayStyleDescr) 
        ] 
        public DataGridViewComboBoxDisplayStyle DisplayStyle
        { 
            get
            {
                if (this.ComboBoxCellTemplate == null)
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                } 
                return this.ComboBoxCellTemplate.DisplayStyle; 
            }
            set 
            {
                if (this.ComboBoxCellTemplate == null)
                {
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired)); 
                }
                this.ComboBoxCellTemplate.DisplayStyle = value; 
                if (this.DataGridView != null) 
                {
                    DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows; 
                    int rowCount = dataGridViewRows.Count;
                    for (int rowIndex = 0; rowIndex < rowCount; rowIndex++)
                    {
                        DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex); 
                        DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell;
                        if (dataGridViewCell != null) 
                        { 
                            dataGridViewCell.DisplayStyleInternal = value;
                        } 
                    }
                    // Calling InvalidateColumn instead of OnColumnCommonChange because DisplayStyle does not affect preferred size.
                    this.DataGridView.InvalidateColumn(this.Index);
                } 
            }
        } 
 
        /// 
        [ 
            DefaultValue(false),
            SRCategory(SR.CatAppearance),
            SRDescription(SR.DataGridView_ComboBoxColumnDisplayStyleForCurrentCellOnlyDescr)
        ] 
        public bool DisplayStyleForCurrentCellOnly
        { 
            get 
            {
                if (this.ComboBoxCellTemplate == null) 
                {
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                }
                return this.ComboBoxCellTemplate.DisplayStyleForCurrentCellOnly; 
            }
            set 
            { 
                if (this.ComboBoxCellTemplate == null)
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                }
                this.ComboBoxCellTemplate.DisplayStyleForCurrentCellOnly = value;
                if (this.DataGridView != null) 
                {
                    DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows; 
                    int rowCount = dataGridViewRows.Count; 
                    for (int rowIndex = 0; rowIndex < rowCount; rowIndex++)
                    { 
                        DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex);
                        DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell;
                        if (dataGridViewCell != null)
                        { 
                            dataGridViewCell.DisplayStyleForCurrentCellOnlyInternal = value;
                        } 
                    } 
                    // Calling InvalidateColumn instead of OnColumnCommonChange because DisplayStyleForCurrentCellOnly does not affect preferred size.
                    this.DataGridView.InvalidateColumn(this.Index); 
                }
            }
        }
 
        /// 
        [ 
            DefaultValue(1), 
            SRCategory(SR.CatBehavior),
            SRDescription(SR.DataGridView_ComboBoxColumnDropDownWidthDescr), 
        ]
        public int DropDownWidth
        {
            get 
            {
                if (this.ComboBoxCellTemplate == null) 
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                } 
                return this.ComboBoxCellTemplate.DropDownWidth;
            }
            set
            { 
                if (this.DropDownWidth != value)
                { 
                    this.ComboBoxCellTemplate.DropDownWidth = value; 
                    if (this.DataGridView != null)
                    { 
                        DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows;
                        int rowCount = dataGridViewRows.Count;
                        for (int rowIndex = 0; rowIndex < rowCount; rowIndex++)
                        { 
                            DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex);
                            DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell; 
                            if (dataGridViewCell != null) 
                            {
                                dataGridViewCell.DropDownWidth = value; 
                            }
                        }
                    }
                } 
            }
        } 
 
        /// 
        [ 
            DefaultValue(FlatStyle.Standard),
            SRCategory(SR.CatAppearance),
            SRDescription(SR.DataGridView_ComboBoxColumnFlatStyleDescr),
        ] 
        public FlatStyle FlatStyle
        { 
            get 
            {
                if (this.CellTemplate == null) 
                {
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                }
                return ((DataGridViewComboBoxCell) this.CellTemplate).FlatStyle; 
            }
            set 
            { 
                if (this.FlatStyle != value)
                { 
                    ((DataGridViewComboBoxCell)this.CellTemplate).FlatStyle = value;
                    if (this.DataGridView != null)
                    {
                        DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows; 
                        int rowCount = dataGridViewRows.Count;
                        for (int rowIndex = 0; rowIndex < rowCount; rowIndex++) 
                        { 
                            DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex);
                            DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell; 
                            if (dataGridViewCell != null)
                            {
                                dataGridViewCell.FlatStyleInternal = value;
                            } 
                        }
                        this.DataGridView.OnColumnCommonChange(this.Index); 
                    } 
                }
            } 
        }

        /// 
        [ 
            Editor("System.Windows.Forms.Design.StringCollectionEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
            DesignerSerializationVisibility(DesignerSerializationVisibility.Content), 
            SRCategory(SR.CatData), 
            SRDescription(SR.DataGridView_ComboBoxColumnItemsDescr)
        ] 
        public DataGridViewComboBoxCell.ObjectCollection Items
        {
            get
            { 
                if (this.ComboBoxCellTemplate == null)
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired)); 
                }
                return this.ComboBoxCellTemplate.GetItems(this.DataGridView); 
            }
        }

        ///  
        [
            DefaultValue(""), 
            SRCategory(SR.CatData), 
            SRDescription(SR.DataGridView_ComboBoxColumnValueMemberDescr),
            TypeConverterAttribute("System.Windows.Forms.Design.DataMemberFieldConverter, " + AssemblyRef.SystemDesign), 
            Editor("System.Windows.Forms.Design.DataMemberFieldEditor, " + AssemblyRef.SystemDesign, typeof(System.Drawing.Design.UITypeEditor))
        ]
        public string ValueMember
        { 
            get
            { 
                if (this.ComboBoxCellTemplate == null) 
                {
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired)); 
                }
                return this.ComboBoxCellTemplate.ValueMember;
            }
            set 
            {
                if (this.ComboBoxCellTemplate == null) 
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                } 
                this.ComboBoxCellTemplate.ValueMember = value;
                if (this.DataGridView != null)
                {
                    DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows; 
                    int rowCount = dataGridViewRows.Count;
                    for (int rowIndex = 0; rowIndex < rowCount; rowIndex++) 
                    { 
                        DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex);
                        DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell; 
                        if (dataGridViewCell != null)
                        {
                            dataGridViewCell.ValueMember = value;
                        } 
                    }
                    this.DataGridView.OnColumnCommonChange(this.Index); 
                } 
            }
        } 

        /// 
        [
            DefaultValue(DataGridViewComboBoxCell.DATAGRIDVIEWCOMBOBOXCELL_defaultMaxDropDownItems), 
            SRCategory(SR.CatBehavior),
            SRDescription(SR.DataGridView_ComboBoxColumnMaxDropDownItemsDescr) 
        ] 
        public int MaxDropDownItems
        { 
            get
            {
                if (this.ComboBoxCellTemplate == null)
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                } 
                return this.ComboBoxCellTemplate.MaxDropDownItems; 
            }
            set 
            {
                if (this.MaxDropDownItems != value)
                {
                    this.ComboBoxCellTemplate.MaxDropDownItems = value; 
                    if (this.DataGridView != null)
                    { 
                        DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows; 
                        int rowCount = dataGridViewRows.Count;
                        for (int rowIndex = 0; rowIndex < rowCount; rowIndex++) 
                        {
                            DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex);
                            DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell;
                            if (dataGridViewCell != null) 
                            {
                                dataGridViewCell.MaxDropDownItems = value; 
                            } 
                        }
                    } 
                }
            }
        }
 
        /// 
        [ 
            DefaultValue(false), 
            SRCategory(SR.CatBehavior),
            SRDescription(SR.DataGridView_ComboBoxColumnSortedDescr) 
        ]
        public bool Sorted
        {
            get 
            {
                if (this.ComboBoxCellTemplate == null) 
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                } 
                return this.ComboBoxCellTemplate.Sorted;
            }
            set
            { 
                if (this.Sorted != value)
                { 
                    this.ComboBoxCellTemplate.Sorted = value; 
                    if (this.DataGridView != null)
                    { 
                        DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows;
                        int rowCount = dataGridViewRows.Count;
                        for (int rowIndex = 0; rowIndex < rowCount; rowIndex++)
                        { 
                            DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex);
                            DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell; 
                            if (dataGridViewCell != null) 
                            {
                                dataGridViewCell.Sorted = value; 
                            }
                        }
                    }
                } 
            }
        } 
 
        /// 
        public override object Clone() 
        {
            DataGridViewComboBoxColumn dataGridViewColumn;
            Type thisType = this.GetType();
 
            if (thisType == columnType) //performance improvement
            { 
                dataGridViewColumn = new DataGridViewComboBoxColumn(); 
            }
            else 
            {
                // SECREVIEW : Late-binding does not represent a security thread, see bug#411899 for more info..
                //
                dataGridViewColumn = (DataGridViewComboBoxColumn)System.Activator.CreateInstance(thisType); 
            }
            if (dataGridViewColumn != null) 
            { 
                base.CloneInternal(dataGridViewColumn);
                ((DataGridViewComboBoxCell) dataGridViewColumn.CellTemplate).TemplateComboBoxColumn = dataGridViewColumn; 
            }
            return dataGridViewColumn;
        }
 
        internal void OnItemsCollectionChanged()
        { 
            // Items collection of the CellTemplate was changed. 
            // Update the items collection of each existing DataGridViewComboBoxCell in the column.
            if (this.DataGridView != null) 
            {
                DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows;
                int rowCount = dataGridViewRows.Count;
                object[] items = ((DataGridViewComboBoxCell)this.CellTemplate).Items.InnerArray.ToArray(); 
                for (int rowIndex = 0; rowIndex < rowCount; rowIndex++)
                { 
                    DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex); 
                    DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell;
                    if (dataGridViewCell != null) 
                    {
                        dataGridViewCell.Items.ClearInternal();
                        dataGridViewCell.Items.AddRangeInternal(items);
                    } 
                }
                this.DataGridView.OnColumnCommonChange(this.Index); 
            } 
        }
 
        /// 
        /// 
        ///    
        ///  
        public override string ToString()
        { 
            StringBuilder sb = new StringBuilder(64); 
            sb.Append("DataGridViewComboBoxColumn { Name=");
            sb.Append(this.Name); 
            sb.Append(", Index=");
            sb.Append(this.Index.ToString(CultureInfo.CurrentCulture));
            sb.Append(" }");
            return sb.ToString(); 
        }
    } 
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Windows.Forms 
{ 
    using System;
    using System.Text; 
    using System.ComponentModel;
    using System.Diagnostics;
    using System.Drawing;
    using System.Drawing.Design; 
    using System.Globalization;
 
    ///  
    [
        Designer("System.Windows.Forms.Design.DataGridViewComboBoxColumnDesigner, " + AssemblyRef.SystemDesign), 
        ToolboxBitmapAttribute(typeof(DataGridViewComboBoxColumn), "DataGridViewComboBoxColumn.bmp")
    ]
    public class DataGridViewComboBoxColumn : DataGridViewColumn
    { 
        private static Type columnType = typeof(DataGridViewComboBoxColumn);
 
        ///  
        public DataGridViewComboBoxColumn() : base(new DataGridViewComboBoxCell())
        { 
            ((DataGridViewComboBoxCell)base.CellTemplate).TemplateComboBoxColumn = this;
        }

        ///  
        [
            Browsable(true), 
            DefaultValue(true), 
            SRCategory(SR.CatBehavior),
            SRDescription(SR.DataGridView_ComboBoxColumnAutoCompleteDescr) 
        ]
        public bool AutoComplete
        {
            get 
            {
                if (this.ComboBoxCellTemplate == null) 
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                } 
                return this.ComboBoxCellTemplate.AutoComplete;
            }
            set
            { 
                if (this.AutoComplete != value)
                { 
                    this.ComboBoxCellTemplate.AutoComplete = value; 
                    if (this.DataGridView != null)
                    { 
                        DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows;
                        int rowCount = dataGridViewRows.Count;
                        for (int rowIndex = 0; rowIndex < rowCount; rowIndex++)
                        { 
                            DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex);
                            DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell; 
                            if (dataGridViewCell != null) 
                            {
                                dataGridViewCell.AutoComplete = value; 
                            }
                        }
                    }
                } 
            }
        } 
 
        /// 
        [ 
            Browsable(false),
            DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ]
        public override DataGridViewCell CellTemplate 
        {
            get 
            { 
                return base.CellTemplate;
            } 
            set
            {
                DataGridViewComboBoxCell dataGridViewComboBoxCell = value as DataGridViewComboBoxCell;
                if (value != null && dataGridViewComboBoxCell == null) 
                {
                    throw new InvalidCastException(SR.GetString(SR.DataGridViewTypeColumn_WrongCellTemplateType, "System.Windows.Forms.DataGridViewComboBoxCell")); 
                } 
                base.CellTemplate = value;
                if (value != null) 
                {
                    dataGridViewComboBoxCell.TemplateComboBoxColumn = this;
                }
            } 
        }
 
        private DataGridViewComboBoxCell ComboBoxCellTemplate 
        {
            get 
            {
                return (DataGridViewComboBoxCell) this.CellTemplate;
            }
        } 

        ///  
        [ 
            DefaultValue(null),
            SRCategory(SR.CatData), 
            SRDescription(SR.DataGridView_ComboBoxColumnDataSourceDescr),
            RefreshProperties(RefreshProperties.Repaint),
            AttributeProvider(typeof(IListSource)),
        ] 
        public object DataSource
        { 
            get 
            {
                if (this.ComboBoxCellTemplate == null) 
                {
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                }
                return this.ComboBoxCellTemplate.DataSource; 
            }
            set 
            { 
                if (this.ComboBoxCellTemplate == null)
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                }
                this.ComboBoxCellTemplate.DataSource = value;
                if (this.DataGridView != null) 
                {
                    DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows; 
                    int rowCount = dataGridViewRows.Count; 
                    for (int rowIndex = 0; rowIndex < rowCount; rowIndex++)
                    { 
                        DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex);
                        DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell;
                        if (dataGridViewCell != null)
                        { 
                            dataGridViewCell.DataSource = value;
                        } 
                    } 
                    this.DataGridView.OnColumnCommonChange(this.Index);
                } 
            }
        }

        ///  
        [
            DefaultValue(""), 
            SRCategory(SR.CatData), 
            SRDescription(SR.DataGridView_ComboBoxColumnDisplayMemberDescr),
            TypeConverterAttribute("System.Windows.Forms.Design.DataMemberFieldConverter, " + AssemblyRef.SystemDesign), 
            Editor("System.Windows.Forms.Design.DataMemberFieldEditor, " + AssemblyRef.SystemDesign, typeof(System.Drawing.Design.UITypeEditor))
        ]
        public string DisplayMember
        { 
            get
            { 
                if (this.ComboBoxCellTemplate == null) 
                {
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired)); 
                }
                return this.ComboBoxCellTemplate.DisplayMember;
            }
            set 
            {
                if (this.ComboBoxCellTemplate == null) 
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                } 
                this.ComboBoxCellTemplate.DisplayMember = value;
                if (this.DataGridView != null)
                {
                    DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows; 
                    int rowCount = dataGridViewRows.Count;
                    for (int rowIndex = 0; rowIndex < rowCount; rowIndex++) 
                    { 
                        DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex);
                        DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell; 
                        if (dataGridViewCell != null)
                        {
                            dataGridViewCell.DisplayMember = value;
                        } 
                    }
                    this.DataGridView.OnColumnCommonChange(this.Index); 
                } 
            }
        } 

        /// 
        [
            DefaultValue(DataGridViewComboBoxDisplayStyle.DropDownButton), 
            SRCategory(SR.CatAppearance),
            SRDescription(SR.DataGridView_ComboBoxColumnDisplayStyleDescr) 
        ] 
        public DataGridViewComboBoxDisplayStyle DisplayStyle
        { 
            get
            {
                if (this.ComboBoxCellTemplate == null)
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                } 
                return this.ComboBoxCellTemplate.DisplayStyle; 
            }
            set 
            {
                if (this.ComboBoxCellTemplate == null)
                {
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired)); 
                }
                this.ComboBoxCellTemplate.DisplayStyle = value; 
                if (this.DataGridView != null) 
                {
                    DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows; 
                    int rowCount = dataGridViewRows.Count;
                    for (int rowIndex = 0; rowIndex < rowCount; rowIndex++)
                    {
                        DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex); 
                        DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell;
                        if (dataGridViewCell != null) 
                        { 
                            dataGridViewCell.DisplayStyleInternal = value;
                        } 
                    }
                    // Calling InvalidateColumn instead of OnColumnCommonChange because DisplayStyle does not affect preferred size.
                    this.DataGridView.InvalidateColumn(this.Index);
                } 
            }
        } 
 
        /// 
        [ 
            DefaultValue(false),
            SRCategory(SR.CatAppearance),
            SRDescription(SR.DataGridView_ComboBoxColumnDisplayStyleForCurrentCellOnlyDescr)
        ] 
        public bool DisplayStyleForCurrentCellOnly
        { 
            get 
            {
                if (this.ComboBoxCellTemplate == null) 
                {
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                }
                return this.ComboBoxCellTemplate.DisplayStyleForCurrentCellOnly; 
            }
            set 
            { 
                if (this.ComboBoxCellTemplate == null)
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                }
                this.ComboBoxCellTemplate.DisplayStyleForCurrentCellOnly = value;
                if (this.DataGridView != null) 
                {
                    DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows; 
                    int rowCount = dataGridViewRows.Count; 
                    for (int rowIndex = 0; rowIndex < rowCount; rowIndex++)
                    { 
                        DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex);
                        DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell;
                        if (dataGridViewCell != null)
                        { 
                            dataGridViewCell.DisplayStyleForCurrentCellOnlyInternal = value;
                        } 
                    } 
                    // Calling InvalidateColumn instead of OnColumnCommonChange because DisplayStyleForCurrentCellOnly does not affect preferred size.
                    this.DataGridView.InvalidateColumn(this.Index); 
                }
            }
        }
 
        /// 
        [ 
            DefaultValue(1), 
            SRCategory(SR.CatBehavior),
            SRDescription(SR.DataGridView_ComboBoxColumnDropDownWidthDescr), 
        ]
        public int DropDownWidth
        {
            get 
            {
                if (this.ComboBoxCellTemplate == null) 
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                } 
                return this.ComboBoxCellTemplate.DropDownWidth;
            }
            set
            { 
                if (this.DropDownWidth != value)
                { 
                    this.ComboBoxCellTemplate.DropDownWidth = value; 
                    if (this.DataGridView != null)
                    { 
                        DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows;
                        int rowCount = dataGridViewRows.Count;
                        for (int rowIndex = 0; rowIndex < rowCount; rowIndex++)
                        { 
                            DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex);
                            DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell; 
                            if (dataGridViewCell != null) 
                            {
                                dataGridViewCell.DropDownWidth = value; 
                            }
                        }
                    }
                } 
            }
        } 
 
        /// 
        [ 
            DefaultValue(FlatStyle.Standard),
            SRCategory(SR.CatAppearance),
            SRDescription(SR.DataGridView_ComboBoxColumnFlatStyleDescr),
        ] 
        public FlatStyle FlatStyle
        { 
            get 
            {
                if (this.CellTemplate == null) 
                {
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                }
                return ((DataGridViewComboBoxCell) this.CellTemplate).FlatStyle; 
            }
            set 
            { 
                if (this.FlatStyle != value)
                { 
                    ((DataGridViewComboBoxCell)this.CellTemplate).FlatStyle = value;
                    if (this.DataGridView != null)
                    {
                        DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows; 
                        int rowCount = dataGridViewRows.Count;
                        for (int rowIndex = 0; rowIndex < rowCount; rowIndex++) 
                        { 
                            DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex);
                            DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell; 
                            if (dataGridViewCell != null)
                            {
                                dataGridViewCell.FlatStyleInternal = value;
                            } 
                        }
                        this.DataGridView.OnColumnCommonChange(this.Index); 
                    } 
                }
            } 
        }

        /// 
        [ 
            Editor("System.Windows.Forms.Design.StringCollectionEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
            DesignerSerializationVisibility(DesignerSerializationVisibility.Content), 
            SRCategory(SR.CatData), 
            SRDescription(SR.DataGridView_ComboBoxColumnItemsDescr)
        ] 
        public DataGridViewComboBoxCell.ObjectCollection Items
        {
            get
            { 
                if (this.ComboBoxCellTemplate == null)
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired)); 
                }
                return this.ComboBoxCellTemplate.GetItems(this.DataGridView); 
            }
        }

        ///  
        [
            DefaultValue(""), 
            SRCategory(SR.CatData), 
            SRDescription(SR.DataGridView_ComboBoxColumnValueMemberDescr),
            TypeConverterAttribute("System.Windows.Forms.Design.DataMemberFieldConverter, " + AssemblyRef.SystemDesign), 
            Editor("System.Windows.Forms.Design.DataMemberFieldEditor, " + AssemblyRef.SystemDesign, typeof(System.Drawing.Design.UITypeEditor))
        ]
        public string ValueMember
        { 
            get
            { 
                if (this.ComboBoxCellTemplate == null) 
                {
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired)); 
                }
                return this.ComboBoxCellTemplate.ValueMember;
            }
            set 
            {
                if (this.ComboBoxCellTemplate == null) 
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                } 
                this.ComboBoxCellTemplate.ValueMember = value;
                if (this.DataGridView != null)
                {
                    DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows; 
                    int rowCount = dataGridViewRows.Count;
                    for (int rowIndex = 0; rowIndex < rowCount; rowIndex++) 
                    { 
                        DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex);
                        DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell; 
                        if (dataGridViewCell != null)
                        {
                            dataGridViewCell.ValueMember = value;
                        } 
                    }
                    this.DataGridView.OnColumnCommonChange(this.Index); 
                } 
            }
        } 

        /// 
        [
            DefaultValue(DataGridViewComboBoxCell.DATAGRIDVIEWCOMBOBOXCELL_defaultMaxDropDownItems), 
            SRCategory(SR.CatBehavior),
            SRDescription(SR.DataGridView_ComboBoxColumnMaxDropDownItemsDescr) 
        ] 
        public int MaxDropDownItems
        { 
            get
            {
                if (this.ComboBoxCellTemplate == null)
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                } 
                return this.ComboBoxCellTemplate.MaxDropDownItems; 
            }
            set 
            {
                if (this.MaxDropDownItems != value)
                {
                    this.ComboBoxCellTemplate.MaxDropDownItems = value; 
                    if (this.DataGridView != null)
                    { 
                        DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows; 
                        int rowCount = dataGridViewRows.Count;
                        for (int rowIndex = 0; rowIndex < rowCount; rowIndex++) 
                        {
                            DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex);
                            DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell;
                            if (dataGridViewCell != null) 
                            {
                                dataGridViewCell.MaxDropDownItems = value; 
                            } 
                        }
                    } 
                }
            }
        }
 
        /// 
        [ 
            DefaultValue(false), 
            SRCategory(SR.CatBehavior),
            SRDescription(SR.DataGridView_ComboBoxColumnSortedDescr) 
        ]
        public bool Sorted
        {
            get 
            {
                if (this.ComboBoxCellTemplate == null) 
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                } 
                return this.ComboBoxCellTemplate.Sorted;
            }
            set
            { 
                if (this.Sorted != value)
                { 
                    this.ComboBoxCellTemplate.Sorted = value; 
                    if (this.DataGridView != null)
                    { 
                        DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows;
                        int rowCount = dataGridViewRows.Count;
                        for (int rowIndex = 0; rowIndex < rowCount; rowIndex++)
                        { 
                            DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex);
                            DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell; 
                            if (dataGridViewCell != null) 
                            {
                                dataGridViewCell.Sorted = value; 
                            }
                        }
                    }
                } 
            }
        } 
 
        /// 
        public override object Clone() 
        {
            DataGridViewComboBoxColumn dataGridViewColumn;
            Type thisType = this.GetType();
 
            if (thisType == columnType) //performance improvement
            { 
                dataGridViewColumn = new DataGridViewComboBoxColumn(); 
            }
            else 
            {
                // SECREVIEW : Late-binding does not represent a security thread, see bug#411899 for more info..
                //
                dataGridViewColumn = (DataGridViewComboBoxColumn)System.Activator.CreateInstance(thisType); 
            }
            if (dataGridViewColumn != null) 
            { 
                base.CloneInternal(dataGridViewColumn);
                ((DataGridViewComboBoxCell) dataGridViewColumn.CellTemplate).TemplateComboBoxColumn = dataGridViewColumn; 
            }
            return dataGridViewColumn;
        }
 
        internal void OnItemsCollectionChanged()
        { 
            // Items collection of the CellTemplate was changed. 
            // Update the items collection of each existing DataGridViewComboBoxCell in the column.
            if (this.DataGridView != null) 
            {
                DataGridViewRowCollection dataGridViewRows = this.DataGridView.Rows;
                int rowCount = dataGridViewRows.Count;
                object[] items = ((DataGridViewComboBoxCell)this.CellTemplate).Items.InnerArray.ToArray(); 
                for (int rowIndex = 0; rowIndex < rowCount; rowIndex++)
                { 
                    DataGridViewRow dataGridViewRow = dataGridViewRows.SharedRow(rowIndex); 
                    DataGridViewComboBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewComboBoxCell;
                    if (dataGridViewCell != null) 
                    {
                        dataGridViewCell.Items.ClearInternal();
                        dataGridViewCell.Items.AddRangeInternal(items);
                    } 
                }
                this.DataGridView.OnColumnCommonChange(this.Index); 
            } 
        }
 
        /// 
        /// 
        ///    
        ///  
        public override string ToString()
        { 
            StringBuilder sb = new StringBuilder(64); 
            sb.Append("DataGridViewComboBoxColumn { Name=");
            sb.Append(this.Name); 
            sb.Append(", Index=");
            sb.Append(this.Index.ToString(CultureInfo.CurrentCulture));
            sb.Append(" }");
            return sb.ToString(); 
        }
    } 
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

                        

                        

                        
                        

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• Int64Converter.cs
• TextChange.cs
• connectionpool.cs
• AnimationLayer.cs
• ConfigXmlCDataSection.cs
• Point3DCollectionConverter.cs
• CustomLineCap.cs
• NgenServicingAttributes.cs
• HttpListenerPrefixCollection.cs
• TraceUtils.cs
• InplaceBitmapMetadataWriter.cs
• BaseDataListPage.cs
• XpsTokenContext.cs
• CodeObject.cs
• EntityDataSourceView.cs
• BufferAllocator.cs
• TextSpanModifier.cs
• DispatcherExceptionEventArgs.cs
• DataFormat.cs
• BoundsDrawingContextWalker.cs
• Int64KeyFrameCollection.cs
• AssemblyResourceLoader.cs
• HandlerBase.cs
• SafeHandle.cs
• RuleSettingsCollection.cs
• AffineTransform3D.cs
• TextInfo.cs
• PaintEvent.cs
• FormatSettings.cs
• CookieParameter.cs
• XmlElementList.cs
• DummyDataSource.cs
• SHA512.cs
• ScrollBarRenderer.cs
• BitmapFrameDecode.cs
• PageSetupDialog.cs
• SatelliteContractVersionAttribute.cs
• StylusCollection.cs
• DataListItemCollection.cs
• VersionPair.cs
• ExpressionBuilder.cs
• TextModifier.cs
• ServiceEndpointAssociationProvider.cs
• FixedHyperLink.cs
• RawStylusInputReport.cs
• SendMailErrorEventArgs.cs
• Point3DValueSerializer.cs
• HuffCodec.cs
• InvalidPropValue.cs
• XamlHostingConfiguration.cs
• WebPartCatalogAddVerb.cs
• CodeMemberMethod.cs
• CommandDevice.cs
• DataGridColumnStyleMappingNameEditor.cs
• HyperlinkAutomationPeer.cs
• OdbcConnectionStringbuilder.cs
• SmiGettersStream.cs
• FontCacheUtil.cs
• HitTestDrawingContextWalker.cs
• ParameterToken.cs
• PointCollection.cs
• DataTable.cs
• SmtpSpecifiedPickupDirectoryElement.cs
• ObjectTypeMapping.cs
• IDispatchConstantAttribute.cs
• ButtonChrome.cs
• EventArgs.cs
• StringExpressionSet.cs
• DesignerActionVerbList.cs
• SourceExpressionException.cs
• NameNode.cs
• SecurityCapabilities.cs
• DbParameterCollectionHelper.cs
• SendKeys.cs
• FirewallWrapper.cs
• SuppressIldasmAttribute.cs
• XmlElement.cs
• FormatConvertedBitmap.cs
• DesignerView.Commands.cs
• StreamAsIStream.cs
• Repeater.cs
• PreservationFileWriter.cs
• CompiledELinqQueryState.cs
• XPathDocumentIterator.cs
• IsolatedStoragePermission.cs
• StructuralCache.cs
• SafeSystemMetrics.cs
• DataGridViewRowPostPaintEventArgs.cs
• TableLayoutPanel.cs
• EntityCommandDefinition.cs
• Light.cs
• Message.cs
• PerformanceCounterPermissionEntryCollection.cs
• StringAttributeCollection.cs
• XPathDocumentNavigator.cs
• Timer.cs
• BrowsableAttribute.cs
• AnnotationHelper.cs
• EntityCodeGenerator.cs
• DataObjectMethodAttribute.cs