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VirtualPathUtility.GetExtension Method

Retrieves the extension of the file that is referenced in the virtual path.

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

public static string GetExtension (
	string virtualPath
)
public static String GetExtension (
	String virtualPath
)
public static function GetExtension (
	virtualPath : String
) : String
Not applicable.

Parameters

virtualPath

The virtual path.

Return Value

The file name extension string literal, including the period (.), a null reference (Nothing in Visual Basic), or an empty string ("").

Exception typeCondition

ArgumentException

virtualPath contains one or more characters that are not valid, as defined in InvalidPathChars.

If the virtual path that is passed into the GetExtension method is "/images/image1.gif", the returned extension is ".gif".

The following code example demonstrates how to use the GetFileName, GetExtension, and GetDirectory methods.

StringBuilder sb = new StringBuilder();
String pathstring = Context.Request.FilePath.ToString();
sb.Append("Current file path = " + pathstring + "<br />");
sb.Append("File name = " + VirtualPathUtility.GetFileName(pathstring).ToString() + "<br />");
sb.Append("File extension = " + VirtualPathUtility.GetExtension(pathstring).ToString() + "<br />");
sb.Append("Directory = " + VirtualPathUtility.GetDirectory(pathstring).ToString() + "<br />");
Response.Write(sb.ToString());

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

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