Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / MIT / System / Web / UI / MobileControls / Design / Util / UnsettableComboBox.cs / 1305376 / UnsettableComboBox.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.UI.Design.MobileControls.Util { using System; using System.Collections; using System.ComponentModel; using System.Diagnostics; using System.Drawing; using System.Windows.Forms; // Standard combobox with a "Not Set" item as the first item in its dropdown. // It also automatically blanks out the "Not Set" item on losing focus. [ System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand, Flags=System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode) ] [Obsolete("The System.Web.Mobile.dll assembly has been deprecated and should no longer be used. For information about how to develop ASP.NET mobile applications, see http://go.microsoft.com/fwlink/?LinkId=157231.")] internal class UnsettableComboBox : ComboBox { private String notSetText; private String notSetCompactText; internal UnsettableComboBox() { notSetText = SR.GetString(SR.UnsettableComboBox_NotSetText); notSetCompactText = SR.GetString(SR.UnsettableComboBox_NotSetCompactText); } internal String NotSetText { get { return notSetText; } set { notSetText = value; } } internal String NotSetCompactText { get { return notSetCompactText; } set { notSetCompactText = value; } } public override String Text { get { // handle DropDown styles in Templating Options dialog // if (this.SelectedIndex == 0) || (this.SelectedIndex == -1)) if (this.SelectedIndex == 0) { return String.Empty; } else { return base.Text; } } set { if (value == notSetCompactText) { base.Text = String.Empty; } else { base.Text = value; } } } internal void AddItem(Object item) { EnsureNotSetItem(); Items.Add(item); } internal void EnsureNotSetItem() { if (Items.Count == 0) { Items.Add(notSetText); } } #if UNUSED_CODE internal bool IsSet() { return SelectedIndex > 0; } #endif protected override void OnLostFocus(EventArgs e) { base.OnLostFocus(e); if (SelectedIndex == 0) { SelectedIndex = -1; } } protected override void SetItemsCore(IList values) { Items.Clear(); if (!DesignMode) { Items.Add(notSetText); } // Unfortunately. the interfaces between SetItemsCore and // AddItemsCore are mismatched as of 3106. ArrayList items = new ArrayList(); foreach(Object item in values) { items.Add(item); } base.AddItemsCore(items.ToArray()); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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