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HttpRequest.MapPath Method (String, String, Boolean)

Maps the specified virtual path to a physical path.

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

public string MapPath(
	string virtualPath,
	string baseVirtualDir,
	bool allowCrossAppMapping


Type: System.String
The virtual path (absolute or relative) for the current request.
Type: System.String
The virtual base directory path used for relative resolution.
Type: System.Boolean
true to indicate that virtualPath may belong to another application; otherwise, false.

Return Value

Type: System.String
The physical path on the server.


allowCrossMapping is false and virtualPath belongs to another application.


No HttpContext object is defined for the request.

Caution noteCaution

The MapPath property potentially contains sensitive information about the hosting environment. The return value should not be displayed to users.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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