109 lines
3.9 KiB
C#
109 lines
3.9 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="WmlCheckBoxAdapter.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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#if WMLSUPPORT
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namespace System.Web.UI.WebControls.Adapters {
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using System;
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using System.Collections;
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using System.Collections.Specialized;
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using System.Globalization;
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using System.Web;
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using System.Web.UI;
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using System.Web.UI.Adapters;
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using System.Web.Util;
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public class WmlCheckBoxAdapter : CheckBoxAdapter, IPostBackDataHandler {
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private const String _clientPrefix = "__cb_";
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private string _ivalue = null;
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protected internal override void Render(HtmlTextWriter markupWriter) {
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WmlTextWriter writer = (WmlTextWriter) markupWriter;
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// If control is not enabled, don't render it at
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// all for WML.
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if (!Control.Enabled) {
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RenderDisabled(writer);
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return;
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}
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((WmlPageAdapter)PageAdapter).RegisterPostField(writer, Control);
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// determine if control is already checked.
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// if so, set initial value.
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_ivalue = Control.Checked ? "1" : String.Empty;
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((WmlPageAdapter)PageAdapter).AddFormVariable (writer, Control.ClientID, _ivalue, false /* randomID */);
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// does not render __ivalue if null or form variables written.
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writer.WriteBeginSelect(null, null, Control.ClientID, _ivalue, Control.ToolTip, true /* multiselect*/);
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if (Control.AutoPostBack) {
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((WmlPageAdapter)PageAdapter).RenderSelectOptionAsAutoPostBack(writer, Control.Text, null);
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}
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else {
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((WmlPageAdapter)PageAdapter).RenderSelectOption(writer, Control.Text);
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}
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writer.WriteEndSelect();
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}
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/// <internalonly/>
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// Parse the WML posted data appropriately.
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bool IPostBackDataHandler.LoadPostData(String key, NameValueCollection data) {
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return LoadPostData(key, data);
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}
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/// <internalonly/>
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// Parse the WML posted data appropriately.
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protected virtual bool LoadPostData(String key, NameValueCollection data) {
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bool dataChanged = false;
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String[] selectedItems = data.GetValues(key);
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if (String.IsNullOrEmpty(selectedItems)) {
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// This shouldn't happen if we're posting back from the form that
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// contains the checkbox. It could happen when being called
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// as the result of a postback from another form on the page,
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// so we just return quietly.
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return false;
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}
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// For a checkbox, our selection list
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// has only one item.
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Debug.Assert(selectedItems.Length == 1, "Checkbox selection " +
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"list has more than one value");
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string selectedItem = selectedItems[0];
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if (selectedItem != null && selectedItem.Length == 0) {
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dataChanged = Control.Checked == true;
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Control.Checked = false;
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}
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else if (StringUtil.EqualsIgnoreCase(selectedItem, "1")) {
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dataChanged = Control.Checked == false;
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Control.Checked = true;
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}
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return dataChanged;
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}
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/// <internalonly/>
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// Raises the post data changed event.
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void IPostBackDataHandler.RaisePostDataChangedEvent() {
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RaisePostDataChangedEvent();
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}
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/// <internalonly/>
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// Raises the post data changed event.
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protected virtual void RaisePostDataChangedEvent() {
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((IPostBackDataHandler)Control).RaisePostDataChangedEvent();
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}
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}
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}
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#endif
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