Gets a value indicating whether the browser supports callback scripts.
Assembly: System.Web (in System.Web.dll)
Syntax
true if the browser supports callback scripts; otherwise, false. The default is false.
Public Overridable ReadOnly Property SupportsCallback As [%$TOPIC/5161sc90_en-us_VS_110_1_0_0_0_0%]public virtual [%$TOPIC/5161sc90_en-us_VS_110_1_0_1_0_0%] SupportsCallback { get; }public:
virtual property [%$TOPIC/5161sc90_en-us_VS_110_1_0_2_0_0%] SupportsCallback {
[%$TOPIC/5161sc90_en-us_VS_110_1_0_2_0_1%] get ();
}abstract SupportsCallback : [%$TOPIC/5161sc90_en-us_VS_110_1_0_3_0_0%] with get
override SupportsCallback : [%$TOPIC/5161sc90_en-us_VS_110_1_0_3_0_1%] with getProperty Value
Type: SystemBooleantrue if the browser supports callback scripts; otherwise, false. The default is false.
Examples
The following code example shows how to determine whether the browser supports callback scripts.
<%@ 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)).SupportsCallback Then
labelText = "Browser supports callback scripts."
Else
labelText = "Browser does not support callback scripts."
End If
Label1.Text = labelText
End Function 'CheckBrowserCaps
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<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).SupportsCallback)
{
labelText = "Browser supports callback scripts.";
}
else
{
labelText = "Browser does not support callback scripts.";
}
Label1.Text = labelText;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<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>
Platforms
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
