Gets a value indicating whether the browser has a dedicated
Back button.
Namespace: System.Web.Configuration
Assembly: System.Web (in system.web.dll)
Visual Basic (Declaration)
Public Overridable ReadOnly Property HasBackButton As Boolean
Dim instance As HttpCapabilitiesBase
Dim value As Boolean
value = instance.HasBackButton
public virtual bool HasBackButton { get; }
public:
virtual property bool HasBackButton {
bool get ();
}
/** @property */
public boolean get_HasBackButton ()
public function get HasBackButton () : boolean
Property Value
true if the browser has a dedicated Back button; otherwise, false. The default is true.
If false, a link control might be necessary when a Back button is not available.
The following code example shows how to determine whether the browser has a dedicated Back button.
<%@ 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_Load(ByVal sender As Object, ByVal e As System.EventArgs)
CheckBrowserCaps()
End Sub
Function CheckBrowserCaps()
Dim labelText As String = ""
Dim myBrowserCaps As System.Web.HttpBrowserCapabilities = Request.Browser
If (CType(myBrowserCaps, System.Web.Configuration.HttpCapabilitiesBase)).HasBackButton Then
labelText = "Browser has a dedicated back button."
Else
labelText = "Browser has no back button."
End If
Label1.Text = labelText
End Function 'CheckBrowserCaps
</script>
<html >
<head>
<title>Browser Capabilities Sample</title>
</head>
<body>
<form runat="server" id="form1">
<div>
Browser Capabilities:
<p/><asp:Label ID="Label1" Runat="server" />
</div>
</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_Load(Object Sender, EventArgs e)
{
CheckBrowserCaps();
}
void CheckBrowserCaps()
{
String labelText = "";
System.Web.HttpBrowserCapabilities myBrowserCaps = Request.Browser;
if (((System.Web.Configuration.HttpCapabilitiesBase)myBrowserCaps).HasBackButton)
{
labelText = "Browser has a dedicated back button.";
}
else
{
labelText = "Browser has no back button.";
}
Label1.Text = labelText;
}
</script>
<html >
<head>
<title>Browser Capabilities Sample</title>
</head>
<body>
<form runat="server" id="form1">
<div>
Browser Capabilities:
<p/><asp:Label ID="Label1" Runat="server" />
</div>
</form>
</body>
</html>
Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.
.NET Framework
Supported in: 3.0, 2.0