Set Focus on a TextBox

Nicolas Haenen · Apr 2, 2004

Hello,

I'm developping a Barcode Scanning program on ppc. I need to set focus on a textbox at page load (and so scan directly... with no use of the mouse to go in the textbox before).

I tried this but don't works :

public void setFocus(System.Web.UI.MobileControls.MobileControl champ

string s
s = "<script language= \"javascript\">document.getElementById('" +
champ.ClientID + "').focus()</script>";
Page.RegisterClientScriptBlock("Focus", s)

private void Page_Load(object sender, System.EventArgs e

if(Page.IsPostBack==false

this.setFocus(Field_Interet)

Thanks a lot for help, Nicolas

Jim Cheshire [MSFT] · Apr 2, 2004

Hi Nicolas,

RegisterClientScriptBlock will place your script before the <form> tag on
the page. Therefore, when this script is encountered, the TextBox to which
you are trying to set focus has not yet been rendered. What you want to do
is use RegisterStartupScript instead. That will place your script after
the closing </form> tag and will work correctly.

Jim Cheshire, MCSE, MCSD [MSFT]
ASP.NET
Developer Support
(e-mail address removed)

This post is provided "AS-IS" with no warranties and confers no rights.

--------------------

Thread-Topic: Set Focus on a TextBox
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Subject: Set Focus on a TextBox
Date: Fri, 2 Apr 2004 05:46:03 -0800
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Hello,

I'm developping a Barcode Scanning program on ppc. I need to set focus on a
textbox at page load (and so scan directly... with no use of the mouse to
go in the textbox before).

I tried this but don't works :

public void setFocus(System.Web.UI.MobileControls.MobileControl champ)
{
string s;
s = "<script language= \"javascript\">document.getElementById('" +
champ.ClientID + "').focus()</script>";
Page.RegisterClientScriptBlock("Focus", s);
}

private void Page_Load(object sender, System.EventArgs e)
{
if(Page.IsPostBack==false)
{
this.setFocus(Field_Interet);
}
}

Thanks a lot for help, Nicolas

Nicolas HAENEN · Apr 6, 2004

Hi,

This code don't work
public void setFocus(MobileControl champ

string s
s =
"<script language=javascript> "
" document.getElementById('" + champ.ClientID + "').focus(); "
"</script>"

Page.RegisterStartupScript("Focus", s)

Do you know another way to resolve my problem ?

Thanks, Nicolas

Jim Cheshire [MSFT] · Apr 7, 2004

Nicolas,

Your string contains a newline character as far as C# is concerned. That
may be why it's not working for you. I suspect that this would generate a
compile error. You should also use a StringBuilder for this instead of a
string.

Here's a code sample to show you what I mean:

<%@ Page Language="C#" %>
<script runat="server">

void Page_Load(object sender, EventArgs e) {
System.Text.StringBuilder sb = new System.Text.StringBuilder("");

sb.Append("<script language='JavaScript'>");
sb.Append("document.getElementById('" + TextBox1.ClientID +
"').focus();<");
sb.Append("/");
sb.Append("script>");

if (!IsStartupScriptRegistered("Focus"))
{
this.RegisterStartupScript("Focus", sb.ToString());
}
}

</script>
<html>
<head>
</head>
<body>
<form runat="server">
<asp:TextBox id="TextBox1" runat="server"></asp:TextBox>
</form>
</body>
</html>

Jim Cheshire, MCSE, MCSD [MSFT]
ASP.NET
Developer Support
(e-mail address removed)

This post is provided "AS-IS" with no warranties and confers no rights.

--------------------

Thread-Topic: Set Focus on a TextBox
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References: <[email protected]>

Subject: RE: Set Focus on a TextBox
Date: Tue, 6 Apr 2004 02:31:02 -0700
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X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.mobile

Hi,

This code don't work :
public void setFocus(MobileControl champ)
{
string s;
s =
"<script language=javascript> "+
" document.getElementById('" + champ.ClientID + "').focus(); "+
"</script>";

Page.RegisterStartupScript("Focus", s);
}

Do you know another way to resolve my problem ?

Thanks, Nicolas

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Set Focus on a TextBox

Nicolas Haenen

Jim Cheshire [MSFT]

Nicolas HAENEN

Jim Cheshire [MSFT]

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