1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
//
// AsyncPostBackTrigger.cs
//
// Author:
// Igor Zelmanovich <igorz@mainsoft.com>
//
// (C) 2007 Mainsoft, Inc. http://www.mainsoft.com
//
//
// 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.
//
using System;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;
using System.Reflection;
namespace System.Web.UI
{
public class AsyncPostBackTrigger : UpdatePanelControlTrigger
{
static readonly MethodInfo _eventHandler = typeof (AsyncPostBackTrigger).GetMethod ("OnEvent");
string _eventName;
public new string ControlID {
get {
return base.ControlID;
}
set {
base.ControlID = value;
}
}
[DefaultValue ("")]
[Category ("Behavior")]
public string EventName {
get {
if (_eventName == null)
return String.Empty;
return _eventName;
}
set {
_eventName = value;
}
}
protected internal override bool HasTriggered ()
{
Control ctrl = Owner.FindControl (ControlID);
string ctrlUniqueID = ctrl != null ? ctrl.UniqueID : null;
if (ctrlUniqueID == null)
return false;
if (String.Compare (Owner.ScriptManager.AsyncPostBackSourceElementID, ctrlUniqueID, StringComparison.Ordinal) == 0)
return true;
return false;
}
// LAME SPEC: it seems DefaultEventAttribute is never queried for the event name.
protected internal override void Initialize () {
Control c = FindTargetControl (false);
ScriptManager sm = Owner.ScriptManager;
string eventName = EventName;
if (!String.IsNullOrEmpty (eventName)) {
EventInfo evi = c.GetType ().GetEvent (eventName, BindingFlags.Instance | BindingFlags.Public | BindingFlags.IgnoreCase);
if (evi == null)
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));
Delegate d = null;
try {
d = Delegate.CreateDelegate (evi.EventHandlerType, this, _eventHandler);
}
catch (ArgumentException) {
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));
}
evi.AddEventHandler (c, d);
}
sm.RegisterAsyncPostBackControl (c);
}
public void OnEvent (object sender, EventArgs e) {
Owner.Update ();
}
public override string ToString () {
return String.Format ("AsyncPostBack: {0}.{1}", ControlID, EventName);
}
}
}
|
