01.using System;
02.using System.Data;
03.using System.Configuration;
04.using System.Web;
05.using System.Web.Security;
06.using System.Web.UI;
07.using System.Web.UI.WebControls;
08.using System.Web.UI.WebControls.WebParts;
09.using System.Web.UI.HtmlControls;
10.
11.using System.Collections;
12.using System.Text;
13.
14./// <summary>
15./// Summary description for MessageBox
16./// </summary>
17.public class MessageBox
18.{
19. private static Hashtable m_executingPages = new Hashtable();
20.
21. public MessageBox()
22. {
23.
24.
25.
26. }
27.
28. public static void Show(string sMessage)
29. {
30.
31. if(!m_executingPages.Contains(HttpContext.Current.Handler))
32. {
33.
34. Page executingPage = HttpContext.Current.Handler as Page;
35.
36. if(executingPage != null)
37. {
38.
39. Queue messageQueue = new Queue();
40.
41. messageQueue.Enqueue(sMessage);
42.
43.
44. m_executingPages.Add(HttpContext.Current.Handler, messageQueue);
45.
46.
47. executingPage.Unload += new EventHandler(ExecutingPage_Unload);
48. }
49. }
50. else
51. {
52.
53.
54.
55.
56. Queue queue = (Queue) m_executingPages[HttpContext.Current.Handler];
57.
58. queue.Enqueue(sMessage);
59. }
60. }
61.
62.
63.
64. private static void ExecutingPage_Unload(object sender, EventArgs e)
65. {
66.
67. Queue queue = (Queue) m_executingPages[HttpContext.Current.Handler];
68.
69. if(queue != null)
70. {
71. StringBuilder sb = new StringBuilder();
72.
73. int iMsgCount = queue.Count;
74.
75. sb.Append("<script language='javascript'>");
76.
77. string sMsg;
78.
79. while(iMsgCount-- > 0)
80. {
81. sMsg = (string) queue.Dequeue();
82. sMsg = sMsg.Replace( "\n", "\\n" );
83. sMsg = sMsg.Replace( "\"", "'" );
84. sb.Append( @"alert( """ + sMsg + @""" );" );
85. }
86.
87. sb.Append(@"</script>");
88.
89. m_executingPages.Remove(HttpContext.Current.Handler);
90.
91. HttpContext.Current.Response.Write(sb.ToString());
92. }
93. }
94.}
