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//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//
// System.Web.UI.HtmlControls.HtmlInputHidden.cs
//
// Authors:
// Jackson Harper (jackson@ximian.com)
//
// (C) 2005-2010 Novell, Inc.
using System.ComponentModel;
using System.Collections.Specialized;
using System.Security.Permissions;
namespace System.Web.UI.HtmlControls {
// CAS
[AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermission (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
// attributes
[DefaultEvent ("ServerChange")]
[SupportsEventValidation]
public class HtmlInputHidden : HtmlInputControl, IPostBackDataHandler {
static readonly object ServerChangeEvent = new object ();
public HtmlInputHidden () : base ("hidden")
{
}
bool LoadPostDataInternal (string postDataKey, NameValueCollection postCollection)
{
string data = postCollection [postDataKey];
if (data != null && data != Value) {
ValidateEvent (postDataKey, String.Empty);
Value = data;
return true;
}
return false;
}
void RaisePostDataChangedEventInternal ()
{
OnServerChange (EventArgs.Empty);
}
protected virtual bool LoadPostData (string postDataKey, NameValueCollection postCollection)
{
return LoadPostDataInternal (postDataKey, postCollection);
}
protected virtual void RaisePostDataChangedEvent ()
{
RaisePostDataChangedEventInternal ();
}
bool IPostBackDataHandler.LoadPostData (string postDataKey,
NameValueCollection postCollection)
{
return LoadPostData (postDataKey, postCollection);
}
void IPostBackDataHandler.RaisePostDataChangedEvent ()
{
RaisePostDataChangedEvent ();
}
protected override void RenderAttributes (HtmlTextWriter writer)
{
Page page = Page;
if (page != null)
page.ClientScript.RegisterForEventValidation (Name);
base.RenderAttributes (writer);
}
protected internal override void OnPreRender (EventArgs e)
{
base.OnPreRender (e);
Page page = Page;
if (page != null && !Disabled) {
page.RegisterRequiresPostBack (this);
page.RegisterEnabledControl (this);
}
}
protected virtual void OnServerChange (EventArgs e)
{
EventHandler handler = (EventHandler) Events [ServerChangeEvent];
if (handler != null)
handler (this, e);
}
[WebSysDescription("")]
[WebCategory("Action")]
public event EventHandler ServerChange {
add { Events.AddHandler (ServerChangeEvent, value); }
remove { Events.RemoveHandler (ServerChangeEvent, value); }
}
}
}
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