How to: display page, post back, display again

[David Thielen]

Hi;

I would like to display a page then immediately cause a post back (the 1st
page will have a big "working... " on it, then in the post back do my query
which will take a couple of seconds, and then redisplay the page again.

What do I do in the first post back so the page is displayed to the user,
but I then get a post back again?

--
thanks - dave
david_at_windwa rd_dot_net
http://www.windwardreports.com

[Walter Wang [MSFT]]

Hi Dave,

Thank you for your post.

Based on my understanding, your question is how to cause another postback
upon page's first load. If I've misunderstood anything, please feel free to
post here.

You can do this by registering a startup script to cause the form to submit
again.

For example, use following WebForm:

<form id="form1" runat="server">
<div>
<asp:Label ID="Label1" runat="server" Text="Please
wait..."></asp:Label>&nbsp ;</div>
</form>

Handle its Load event:

protected void Page_Load(objec t sender, EventArgs e)
{
if (!IsPostBack)
{
ClientScript.Re gisterStartupSc ript(GetType(), "postback",
"document.f orms[0].submit();", true);
} else
{
// simulate a lengthy operation
System.Threadin g.Thread.Sleep( 5000);
// hide the "please wait" prompt
Label1.Visible = false;
}
}

Also, you may find following article useful:

#PleaseWaitButt on ASP.NET Server Control
http://www.codeproject.com/aspnet/PleaseWaitButton.asp

Hope this helps. Please feel free to post here if anything is unclear.

Sincerely,
Walter Wang
Microsoft Online Community Support

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