DataGridViewCheckBoxColumn.cs source code in C# .NET

                        Code:
                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / DataGridViewCheckBoxColumn.cs / 1 / DataGridViewCheckBoxColumn.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.Diagnostics.CodeAnalysis; 
    using System.Globalization;
 
    ///  
    [ToolboxBitmapAttribute(typeof(DataGridViewCheckBoxColumn), "DataGridViewCheckBoxColumn.bmp")]
    public class DataGridViewCheckBoxColumn : DataGridViewColumn 
    {
        /// 
        public DataGridViewCheckBoxColumn() : this(false)
        { 
        }
 
        ///  
        [
            SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors") // Can't think of a workaround. 
        ]
        public DataGridViewCheckBoxColumn(bool threeState)
            : base(new DataGridViewCheckBoxCell(threeState))
        { 
            DataGridViewCellStyle defaultCellStyle = new DataGridViewCellStyle();
            defaultCellStyle.AlignmentInternal = DataGridViewContentAlignment.MiddleCenter; 
            if (threeState) 
            {
                defaultCellStyle.NullValue = CheckState.Indeterminate; 
            }
            else
            {
                defaultCellStyle.NullValue = false; 
            }
            this.DefaultCellStyle = defaultCellStyle; 
        } 

        ///  
        [
            Browsable(false),
            DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
        ] 
        public override DataGridViewCell CellTemplate
        { 
            get 
            {
                return base.CellTemplate; 
            }
            set
            {
                if (value != null && !(value is System.Windows.Forms.DataGridViewCheckBoxCell)) 
                {
                    throw new InvalidCastException(SR.GetString(SR.DataGridViewTypeColumn_WrongCellTemplateType, "System.Windows.Forms.DataGridViewCheckBoxCell")); 
                } 
                base.CellTemplate = value;
            } 
        }

        private DataGridViewCheckBoxCell CheckBoxCellTemplate
        { 
            get
            { 
                return (DataGridViewCheckBoxCell) this.CellTemplate; 
            }
        } 

        /// 
        [
            Browsable(true), 
            SRCategory(SR.CatAppearance),
            SRDescription(SR.DataGridView_ColumnDefaultCellStyleDescr) 
        ] 
        public override DataGridViewCellStyle DefaultCellStyle
        { 
            get
            {
                return base.DefaultCellStyle;
            } 
            set
            { 
                base.DefaultCellStyle = value; 
            }
        } 

        /// 
        [
            DefaultValue(null), 
            SRCategory(SR.CatData),
            SRDescription(SR.DataGridView_CheckBoxColumnFalseValueDescr), 
            TypeConverter(typeof(StringConverter)) 
        ]
        public object FalseValue 
        {
            get
            {
                if (this.CheckBoxCellTemplate == null) 
                {
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired)); 
                } 
                return this.CheckBoxCellTemplate.FalseValue;
            } 
            set
            {
                if (this.FalseValue != value)
                { 
                    this.CheckBoxCellTemplate.FalseValueInternal = 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);
                            DataGridViewCheckBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewCheckBoxCell; 
                            if (dataGridViewCell != null)
                            { 
                                dataGridViewCell.FalseValueInternal = value; 
                            }
                        } 
                        this.DataGridView.InvalidateColumn(this.Index);
                    }
                }
            } 
        }
 
        ///  
        [
            DefaultValue(FlatStyle.Standard), 
            SRCategory(SR.CatAppearance),
            SRDescription(SR.DataGridView_CheckBoxColumnFlatStyleDescr)
        ]
        public FlatStyle FlatStyle 
        {
            get 
            { 
                if (this.CheckBoxCellTemplate == null)
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                }
                return this.CheckBoxCellTemplate.FlatStyle;
            } 
            set
            { 
                if (this.FlatStyle != value) 
                {
                    this.CheckBoxCellTemplate.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); 
                            DataGridViewCheckBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewCheckBoxCell;
                            if (dataGridViewCell != null) 
                            {
                                dataGridViewCell.FlatStyleInternal = value;
                            }
                        } 
                        this.DataGridView.OnColumnCommonChange(this.Index);
                    } 
                } 
            }
        } 

        /// 
        [
            DefaultValue(null), 
            SRCategory(SR.CatData),
            SRDescription(SR.DataGridView_CheckBoxColumnIndeterminateValueDescr), 
            TypeConverter(typeof(StringConverter)) 
        ]
        public object IndeterminateValue 
        {
            get
            {
                if (this.CheckBoxCellTemplate == null) 
                {
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired)); 
                } 
                return this.CheckBoxCellTemplate.IndeterminateValue;
            } 
            set
            {
                if (this.IndeterminateValue != value)
                { 
                    this.CheckBoxCellTemplate.IndeterminateValueInternal = 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);
                            DataGridViewCheckBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewCheckBoxCell; 
                            if (dataGridViewCell != null)
                            { 
                                dataGridViewCell.IndeterminateValueInternal = value; 
                            }
                        } 
                        this.DataGridView.InvalidateColumn(this.Index);
                    }
                }
            } 
        }
 
        ///  
        [
            DefaultValue(false), 
            SRCategory(SR.CatBehavior),
            SRDescription(SR.DataGridView_CheckBoxColumnThreeStateDescr)
        ]
        public bool ThreeState 
        {
            get 
            { 
                if (this.CheckBoxCellTemplate == null)
                { 
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired));
                }
                return this.CheckBoxCellTemplate.ThreeState;
            } 
            [
                SuppressMessage("Microsoft.Performance", "CA1808:AvoidCallsThatBoxValueTypes") // OK to cast a NullValue into a bool and CheckState 
            ] 
            set
            { 
                if (this.ThreeState != value)
                {
                    this.CheckBoxCellTemplate.ThreeStateInternal = 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);
                            DataGridViewCheckBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewCheckBoxCell;
                            if (dataGridViewCell != null)
                            { 
                                dataGridViewCell.ThreeStateInternal = value;
                            } 
                        } 
                        this.DataGridView.InvalidateColumn(this.Index);
                    } 

                    if (value &&
                        this.DefaultCellStyle.NullValue is bool &&
                        (bool) this.DefaultCellStyle.NullValue == false) 
                    {
                        this.DefaultCellStyle.NullValue = CheckState.Indeterminate; 
                    } 
                    else if (!value &&
                             this.DefaultCellStyle.NullValue is CheckState && 
                             (CheckState) this.DefaultCellStyle.NullValue == CheckState.Indeterminate)
                    {
                        this.DefaultCellStyle.NullValue = false;
                    } 
                }
            } 
        } 

        ///  
        [
            DefaultValue(null),
            SRCategory(SR.CatData),
            SRDescription(SR.DataGridView_CheckBoxColumnTrueValueDescr), 
            TypeConverter(typeof(StringConverter))
        ] 
        public object TrueValue 
        {
            get 
            {
                if (this.CheckBoxCellTemplate == null)
                {
                    throw new InvalidOperationException(SR.GetString(SR.DataGridViewColumn_CellTemplateRequired)); 
                }
                return this.CheckBoxCellTemplate.TrueValue; 
            } 
            set
            { 
                if (this.TrueValue != value)
                {
                    this.CheckBoxCellTemplate.TrueValueInternal = 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);
                            DataGridViewCheckBoxCell dataGridViewCell = dataGridViewRow.Cells[this.Index] as DataGridViewCheckBoxCell;
                            if (dataGridViewCell != null)
                            { 
                                dataGridViewCell.TrueValueInternal = value;
                            } 
                        } 
                        this.DataGridView.InvalidateColumn(this.Index);
                    } 
                }
            }
        }
 
        private bool ShouldSerializeDefaultCellStyle()
        { 
            Object defaultNullValue; 
            DataGridViewCheckBoxCell templateCell = this.CellTemplate as DataGridViewCheckBoxCell;
            if (templateCell == null) 
            {
                Debug.Fail("we can't compute the default cell style w/o a template cell");
                return true;
            } 

            if (templateCell.ThreeState) 
            { 
                defaultNullValue = CheckState.Indeterminate;
            } 
            else
            {
                defaultNullValue = false;
            } 

            if (!this.HasDefaultCellStyle) 
            { 
                return false;
            } 

            DataGridViewCellStyle defaultCellStyle = this.DefaultCellStyle;

            return (!defaultCellStyle.BackColor.IsEmpty || 
                    !defaultCellStyle.ForeColor.IsEmpty ||
                    !defaultCellStyle.SelectionBackColor.IsEmpty || 
                    !defaultCellStyle.SelectionForeColor.IsEmpty || 
                    defaultCellStyle.Font != null ||
                    !defaultCellStyle.NullValue.Equals(defaultNullValue) || 
                    !defaultCellStyle.IsDataSourceNullValueDefault ||
                    !String.IsNullOrEmpty(defaultCellStyle.Format) ||
                    !defaultCellStyle.FormatProvider.Equals(System.Globalization.CultureInfo.CurrentCulture) ||
                    defaultCellStyle.Alignment != DataGridViewContentAlignment.MiddleCenter || 
                    defaultCellStyle.WrapMode != DataGridViewTriState.NotSet ||
                    defaultCellStyle.Tag !=  null || 
                    !defaultCellStyle.Padding.Equals(Padding.Empty)); 
        }
 
        /// 
        public override string ToString()
        {
            StringBuilder sb = new StringBuilder(64); 
            sb.Append("DataGridViewCheckBoxColumn { 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.
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DataGridViewCheckBoxColumn.cs source code in C# .NET

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