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