Gets a value indicating whether the browser is a search engine Web crawler.
(in System.Web.dll)
Visual Basic (Declaration)
Public ReadOnly Property Crawler As Boolean
Dim instance As HttpCapabilitiesBase
Dim value As Boolean
value = instance.Crawler
public bool Crawler { get; }
public:
property bool Crawler {
bool get ();
}
public function get Crawler () : boolean
Property Value
Type:
System..::.Boolean
true if the browser is a search engine; otherwise, false. The default is false.
The following code example shows how to determine whether the client is a search engine Web crawler.
<%@ 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)).Crawler Then
labelText = "Browser is a search engine."
Else
labelText = "Browser is not a search engine."
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).Crawler)
{
labelText = "Browser is a search engine.";
}
else
{
labelText = "Browser is not a search engine.";
}
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 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