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");
41 static readonly char[] _controlIdSeparators = {'_', '$'};
45 public new string ControlID {
47 return base.ControlID;
50 base.ControlID = value;
55 [Category ("Behavior")]
56 public string EventName {
58 if (_eventName == null)
67 protected internal override bool HasTriggered ()
69 Control ctrl = FindTargetControl (true);
70 string ctrlUniqueID = ctrl != null ? ctrl.UniqueID : null;
71 if (ctrlUniqueID == null)
74 string asyncPostBackElementID = Owner.ScriptManager.AsyncPostBackSourceElementID;
75 if (String.Compare (asyncPostBackElementID, ctrlUniqueID, StringComparison.Ordinal) == 0)
78 int sep = asyncPostBackElementID.IndexOfAny (_controlIdSeparators);
79 if (sep > -1 && String.Compare (asyncPostBackElementID, 0, ctrlUniqueID, 0, ctrlUniqueID.Length, StringComparison.Ordinal) == 0)
86 protected internal override void Initialize ()
88 Control c = FindTargetControl (true);
89 ScriptManager sm = Owner.ScriptManager;
90 string eventName = EventName;
91 if (String.IsNullOrEmpty (eventName)) {
92 object[] attrs = c.GetType ().GetCustomAttributes (typeof (DefaultEventAttribute), true);
93 if (attrs != null && attrs.Length > 0) {
94 var dea = attrs [0] as DefaultEventAttribute;
100 if (!String.IsNullOrEmpty (eventName)) {
101 EventInfo evi = c.GetType ().GetEvent (eventName, BindingFlags.Instance | BindingFlags.Public | BindingFlags.IgnoreCase);
103 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));
107 d = Delegate.CreateDelegate (evi.EventHandlerType, this, _eventHandler);
109 catch (ArgumentException) {
110 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));
113 evi.AddEventHandler (c, d);
116 sm.RegisterAsyncPostBackControl (c);
119 public void OnEvent (object sender, EventArgs e)
121 UpdatePanel owner = Owner;
122 if (owner != null && owner.UpdateMode != UpdatePanelUpdateMode.Always)
126 public override string ToString () {
127 return String.Format ("AsyncPostBackTrigger: {0}.{1}", ControlID, EventName);