focusing on a textbox

[Steven Zilberman]

Is there a way to focus on a textbox in ASP.Net?
Can I do something like textBoxMyTextBox.Focus() ???
Meaning, I can't do it with the JavaScript way, because
JavaScript does not know the form name, and for some
reason it does not see the id of the textbox. Thank you.

 

[Steven]

For some reason it's not working. My asp code looks like
this:
<form runat="server">
<asp:TextBox id="UserName" runat="server" MaxLength="10"
Width="120px"></asp:TextBox>
</form>

The JavaScript code looks like this:
<script language="JavaScript">
<!--
window.document.all("UserName").focus();
//-->
</script>

I am getting a javascript error which says that
window.document.all(...) is a null or not an object.

Thanks.

Steven

 

[Vidar Petursson]

Hi

Probably the element is not ready/loaded on the client when you call
focus....
Try changing the script to this... should be easy to modify to focus on any
element...

<script language="JavaScript">
<!--
function doFocus(){
if(document.forms[0].UserName) document.forms[0].UserName.focus();
}
onload = doFocus;
//-->
</script>



--
Best Regards
Vidar Petursson
==============================
Microsoft Internet Client & Controls MVP
==============================

 

[Chris R. Timmons]

For some reason it's not working. My asp code looks like
this:
<form runat="server">
<asp:TextBox id="UserName" runat="server" MaxLength="10"
Width="120px"></asp:TextBox>
</form>

The JavaScript code looks like this:
<script language="JavaScript">
<!--
window.document.all("UserName").focus();
//-->
</script>

I am getting a javascript error which says that
window.document.all(...) is a null or not an object.

Steven,

Look at the browser's HTML source for your page. I'll bet ASP.NET
modified the control name to something like _ctl0_UserName. ASP.NET
usually does this to controls in a UserControl (.ascx), so there
won't be a name collision if multiple instances of the same
UserControl are on the same page.

The way to fix this is to insert the JavaScript using server-side
code, and use the control's ClientId property to refer to the control
in the JavaScript code.

For example, you can put code like this in the Page_Load event of
your form (C#) to make the UserName TextBox control get focus:

string script = @"
<script language=""javascript"">
<!--
document.getElementById('{0}').focus();
//-->
</script>
";

if (!this.IsStartupScriptRegistered("SetWebControlFocus"))
this.RegisterStartupScript("SetWebControlFocus",
string.Format(script, UserName.ClientID));



Hope this helps.

Chris.