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VirtualPathUtility.IsAbsolute Method

Note: This method is new in the .NET Framework version 2.0.

Returns a Boolean value indicating whether the specified virtual path is absolute; that is, it starts with a literal slash mark (/).

Namespace: System.Web
Assembly: System.Web (in system.web.dll)

public static bool IsAbsolute (
	string virtualPath
public static boolean IsAbsolute (
	String virtualPath
public static function IsAbsolute (
	virtualPath : String
) : boolean



The virtual path to check.

Return Value

true if virtualPath is an absolute path and is not a null reference (Nothing in Visual Basic) or an empty string (""); otherwise, false.

Exception typeCondition


virtualPath is a null reference (Nothing in Visual Basic).

A virtual path is absolute if it begins with a literal slash mark (/). For example, the Path property returns an absolute virtual path.

The following code example demonstrates how to use the IsAbsolute, IsAppRelative, and ToAppRelative methods.

StringBuilder sb2 = new StringBuilder();
String pathstring1 = Context.Request.CurrentExecutionFilePath.ToString();
sb2.Append("Current Executing File Path = " + pathstring1.ToString() + "<br>");
sb2.Append("Is Absolute = " + VirtualPathUtility.IsAbsolute(pathstring1).ToString() + "<br>");
sb2.Append("Is AppRelative = " + VirtualPathUtility.IsAppRelative(pathstring1).ToString() + "<br>");
sb2.Append("Make AppRelative = " + VirtualPathUtility.ToAppRelative(pathstring1).ToString() + "<br>");

Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0