Comments by Al Moje (Top 200 by date)

Example (Code behind):

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections;
using System.Text;
public class MessageBox
{
private static Hashtable m_executingPages = new Hashtable();
private MessageBox() { }
public static void Show(string sMessage)
{
if (!m_executingPages.Contains(HttpContext.Current.Handler))
{
Page executingPage = HttpContext.Current.Handler as Page;
if (executingPage != null)
{
Queue messageQueue = new Queue();
messageQueue.Enqueue(sMessage);
m_executingPages.Add(HttpContext.Current.Handler, messageQueue);
executingPage.Unload += new EventHandler(ExecutingPage_Unload);
}
}
else
{
Queue queue = (Queue)m_executingPages[HttpContext.Current.Handler];
queue.Enqueue(sMessage);
}
}

public static void Show(System.Web.UI.Page page, string msg)
{
ScriptManager.RegisterClientScriptBlock(page, page.GetType(), "clientScript", "javascript:alert('" + msg + "');", true);
}

private static void ExecutingPage_Unload(object sender, EventArgs e)
{
Queue queue = (Queue)m_executingPages[HttpContext.Current.Handler];
if (queue != null)
{
StringBuilder sb = new StringBuilder();
int iMsgCount = queue.Count;
sb.Append("<script language='javascript'>");
string sMsg;
while (iMsgCount-- > 0)
{
sMsg = (string)queue.Dequeue();
sMsg = sMsg.Replace("\n", "\\n");
sMsg = sMsg.Replace("\"", "'");
sb.Append(@"alert( """ + sMsg + @""" );");
}
sb.Append(@"</script>");
m_executingPages.Remove(HttpContext.Current.Handler);
HttpContext.Current.Response.Write(sb.ToString());
}
}
}

public partial class _Default : System.Web.UI.Page
{
protected void btnCreateAccount_Click(object sender, EventArgs e)
{
this.btnCreateAccount.Enabled = false;
MessageBox.Show(this, "Account was successfuly created...");
}
}