DataMemberFieldEditor.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / WinForms / System / WinForms / Design / DataMemberFieldEditor.cs / 1 / DataMemberFieldEditor.cs
                        

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

[assembly: System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode", Scope="member", Target="System.Windows.Forms.Design.DataMemberFieldEditor..ctor()")] 
 
namespace System.Windows.Forms.Design {
 
    using System;
    using System.ComponentModel;
    using System.ComponentModel.Design;
    using System.Drawing; 
    using System.Drawing.Design;
    using System.Design; 
 
    internal class DataMemberFieldEditor : UITypeEditor {
 
        private DesignBindingPicker designBindingPicker;

        public override bool IsDropDownResizable {
             get { 
                 return true;
             } 
        } 

        public override object EditValue(ITypeDescriptorContext context,  IServiceProvider  provider, object value) { 
            if (provider != null && context.Instance != null) {
                PropertyDescriptor dataSourceProperty = TypeDescriptor.GetProperties(context.Instance)["DataSource"];
                if (dataSourceProperty != null) {
                    object dataSource = dataSourceProperty.GetValue(context.Instance); 
                    if (designBindingPicker == null) {
                        designBindingPicker = new DesignBindingPicker(); 
                    } 
                    DesignBinding oldSelection = new DesignBinding(dataSource, (string) value);
                    DesignBinding newSelection = designBindingPicker.Pick(context, provider, 
                                                                          false, /* showDataSources   */
                                                                          true,  /* showDataMembers   */
                                                                          false, /* selectListMembers */
                                                                          dataSource, String.Empty, 
                                                                          oldSelection);
                    if (dataSource != null && newSelection != null) { 
                        value = newSelection.DataMember; 
                    }
                } 
            }

            return value;
        } 

        public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context) { 
            return UITypeEditorEditStyle.DropDown; 
        }
    } 
}

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

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