2 // AsyncPostBackTrigger.cs
5 // Igor Zelmanovich <igorz@mainsoft.com>
7 // (C) 2007 Mainsoft, Inc. http://www.mainsoft.com
10 // Permission is hereby granted, free of charge, to any person obtaining
11 // a copy of this software and associated documentation files (the
12 // "Software"), to deal in the Software without restriction, including
13 // without limitation the rights to use, copy, modify, merge, publish,
14 // distribute, sublicense, and/or sell copies of the Software, and to
15 // permit persons to whom the Software is furnished to do so, subject to
16 // the following conditions:
18 // The above copyright notice and this permission notice shall be
19 // included in all copies or substantial portions of the Software.
21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 using System.Collections.Generic;
33 using System.ComponentModel;
34 using System.Reflection;
36 namespace System.Web.UI
38 public class AsyncPostBackTrigger : UpdatePanelControlTrigger
40 static readonly MethodInfo _eventHandler = typeof (AsyncPostBackTrigger).GetMethod ("OnEvent");
44 public new string ControlID {
46 return base.ControlID;
49 base.ControlID = value;
54 [Category ("Behavior")]
55 public string EventName {
57 if (_eventName == null)
66 protected internal override bool HasTriggered ()
68 Control ctrl = FindTargetControl (true);
69 string ctrlUniqueID = ctrl != null ? ctrl.UniqueID : null;
70 if (ctrlUniqueID == null)
73 string asyncPostBackElementID = Owner.ScriptManager.AsyncPostBackSourceElementID;
74 if (String.Compare (asyncPostBackElementID, ctrlUniqueID, StringComparison.Ordinal) == 0)
76 else if (asyncPostBackElementID.StartsWith (ctrlUniqueID + "$", StringComparison.Ordinal))
82 // LAME SPEC: it seems DefaultEventAttribute is never queried for the event name.
83 protected internal override void Initialize ()
85 Control c = FindTargetControl (true);
86 ScriptManager sm = Owner.ScriptManager;
87 string eventName = EventName;
89 if (!String.IsNullOrEmpty (eventName)) {
90 EventInfo evi = c.GetType ().GetEvent (eventName, BindingFlags.Instance | BindingFlags.Public | BindingFlags.IgnoreCase);
92 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));
96 d = Delegate.CreateDelegate (evi.EventHandlerType, this, _eventHandler);
98 catch (ArgumentException) {
99 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));
102 evi.AddEventHandler (c, d);
105 sm.RegisterAsyncPostBackControl (c);
108 public void OnEvent (object sender, EventArgs e)
110 UpdatePanel owner = Owner;
111 if (owner != null && owner.UpdateMode != UpdatePanelUpdateMode.Always)
115 public override string ToString () {
116 return String.Format ("AsyncPostBackTrigger: {0}.{1}", ControlID, EventName);