130 lines
4.1 KiB
C#
130 lines
4.1 KiB
C#
//
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// AsyncPostBackTrigger.cs
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//
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// Author:
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// Igor Zelmanovich <igorz@mainsoft.com>
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//
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// (C) 2007 Mainsoft, Inc. http://www.mainsoft.com
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.ComponentModel;
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using System.Reflection;
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namespace System.Web.UI
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{
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public class AsyncPostBackTrigger : UpdatePanelControlTrigger
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{
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static readonly MethodInfo _eventHandler = typeof (AsyncPostBackTrigger).GetMethod ("OnEvent");
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static readonly char[] _controlIdSeparators = {'_', '$'};
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string _eventName;
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public new string ControlID {
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get {
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return base.ControlID;
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}
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set {
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base.ControlID = value;
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}
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}
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[DefaultValue ("")]
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[Category ("Behavior")]
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public string EventName {
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get {
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if (_eventName == null)
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return String.Empty;
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return _eventName;
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}
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set {
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_eventName = value;
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}
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}
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protected internal override bool HasTriggered ()
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{
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Control ctrl = FindTargetControl (true);
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string ctrlUniqueID = ctrl != null ? ctrl.UniqueID : null;
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if (ctrlUniqueID == null)
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return false;
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string asyncPostBackElementID = Owner.ScriptManager.AsyncPostBackSourceElementID;
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if (String.Compare (asyncPostBackElementID, ctrlUniqueID, StringComparison.Ordinal) == 0)
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return true;
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else {
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int sep = asyncPostBackElementID.IndexOfAny (_controlIdSeparators);
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if (sep > -1 && String.Compare (asyncPostBackElementID, 0, ctrlUniqueID, 0, ctrlUniqueID.Length, StringComparison.Ordinal) == 0)
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return true;
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}
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return false;
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}
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protected internal override void Initialize ()
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{
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Control c = FindTargetControl (true);
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ScriptManager sm = Owner.ScriptManager;
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string eventName = EventName;
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if (String.IsNullOrEmpty (eventName)) {
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object[] attrs = c.GetType ().GetCustomAttributes (typeof (DefaultEventAttribute), true);
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if (attrs != null && attrs.Length > 0) {
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var dea = attrs [0] as DefaultEventAttribute;
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if (dea != null)
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eventName = dea.Name;
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}
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}
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if (!String.IsNullOrEmpty (eventName)) {
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EventInfo evi = c.GetType ().GetEvent (eventName, BindingFlags.Instance | BindingFlags.Public | BindingFlags.IgnoreCase);
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if (evi == null)
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throw new InvalidOperationException (String.Format ("Could not find an event named '{0}' on associated control '{1}' for the trigger in UpdatePanel '{2}'.", eventName, c.ID, Owner.ID));
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Delegate d = null;
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try {
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d = Delegate.CreateDelegate (evi.EventHandlerType, this, _eventHandler);
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}
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catch (ArgumentException) {
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throw new InvalidOperationException (String.Format ("The event '{0}' in '{1}' for the control '{2}' does not match a standard event handler signature.", eventName, c.GetType (), c.ID));
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}
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evi.AddEventHandler (c, d);
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}
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sm.RegisterAsyncPostBackControl (c);
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}
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public void OnEvent (object sender, EventArgs e)
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{
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UpdatePanel owner = Owner;
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if (owner != null && owner.UpdateMode != UpdatePanelUpdateMode.Always)
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owner.Update ();
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}
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public override string ToString () {
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return String.Format ("AsyncPostBackTrigger: {0}.{1}", ControlID, EventName);
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}
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}
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} |