Sets the browser focus to the specified control.
(in System.Web.dll)
Visual Basic (Declaration)
Public Sub SetFocus ( _
control As Control _
)
Dim instance As Page
Dim control As Control
instance.SetFocus(control)
public void SetFocus(
Control control
)
public:
void SetFocus(
Control^ control
)
public function SetFocus(
control : Control
)
Use the SetFocus method to make the specified control the active control on the Web page displayed by the browser. The SetFocus method must be called before the page is prepared for rendering to the client in the PreRender event.
.gif) Note: |
|---|
The SetFocus method will work only on browsers supporting ECMAScript version 1.3 or later. |
The following code example sets the focus to the second text box on a Web page.
.gif) Security Note: |
|---|
This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview. |
<%@ page language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Sub Page_Init(ByVal sender As Object, ByVal e As EventArgs)
SetFocus(focusHere)
End Sub
</script>
<html >
<head id="Head1" runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<asp:textbox id="default" runat="server" /><br />
<asp:textbox id="focusHere" runat="server" />
</form>
</body>
</html>
<%@ page language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
void Page_Init(object sender, EventArgs e)
{
SetFocus(focusHere);
}
</script>
<html >
<head id="Head1" runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<asp:textbox id="default" runat="server" /><br />
<asp:textbox id="focusHere" runat="server" />
</form>
</body>
</html>
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 3.5, 3.0, 2.0
Reference
MaintainScrollPositionOnPostback()()()