Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / WinForms / System / WinForms / Design / DataGridViewColumnTypeEditor.cs / 1 / DataGridViewColumnTypeEditor.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms.Design { using System.Design; using System; using System.ComponentModel; using System.ComponentModel.Design; using System.Drawing; using System.Drawing.Design; internal class DataGridViewColumnTypeEditor : UITypeEditor { // FxCop made me add this constructor. private DataGridViewColumnTypeEditor() : base() {} DataGridViewColumnTypePicker columnTypePicker = null; public override bool IsDropDownResizable { get { return true; } } public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value) { if (provider != null) { IWindowsFormsEditorService edSvc = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService)); if (edSvc != null && context.Instance != null) { if (this.columnTypePicker == null) { this.columnTypePicker = new DataGridViewColumnTypePicker(); } DataGridViewColumnCollectionDialog.ListBoxItem item = (DataGridViewColumnCollectionDialog.ListBoxItem) context.Instance; IDesignerHost host = (IDesignerHost) provider.GetService(typeof(IDesignerHost)); ITypeDiscoveryService discoveryService = null; if (host != null) { discoveryService = (ITypeDiscoveryService) host.GetService(typeof(ITypeDiscoveryService)); } columnTypePicker.Start(edSvc, discoveryService, item.DataGridViewColumn.GetType()); edSvc.DropDownControl(columnTypePicker); if (columnTypePicker.SelectedType != null) { value = columnTypePicker.SelectedType; } } } 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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