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HttpServerUtility.MapPath Method

Returns the physical file path that corresponds to the specified virtual path.

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

'Declaration
Public Function MapPath ( _
	path As String _
) As String

Parameters

path
Type: System.String

The virtual path in the Web application.

Return Value

Type: System.String
The physical file path on the Web server that corresponds to path.

ExceptionCondition
HttpException

The current HttpContext is Nothing.

If path is Nothing, the MapPath method returns the full physical path of the directory that contains the current request for the path. The relative path does not need to specify an existing file or folder for this method to return a value. However, you cannot specify a path outside of the Web application.

Security noteSecurity Note

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

A Web application that resides at C:\ExampleSites\TestMapPath would return the following results:

Request from

path

Returned value

RootLevelPage.aspx

Nothing

C:\ExampleSites\TestMapPath

RootLevelPage.aspx

"/DownOneLevel/DownLevelPage.aspx"

C:\ExampleSites\TestMapPath\DownOneLevel\DownLevelPage.aspx

RootLevelPage.aspx

"/NotRealFolder"

C:\ExampleSites\TestMapPath\NotRealFolder

RootLevelPage.aspx

"../OutsideApplication"

HttpException

/DownOneLevel/DownLevelPage.aspx

Nothing

C:\ExampleSites\TestMapPath\DownOneLevel

/DownOneLevel/DownLevelPage.aspx

"../RootLevelPage.aspx"

C:\ExampleSites\TestMapPath\RootLevelPage.aspx

The following example shows how to retrieve the physical file of a relative virtual path. The code resides in the code-behind file for a web page and utilizes the default Server object.

Public Class _Default
    Inherits Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
        Dim pathToFiles = Server.MapPath("/UploadedFiles")
    End Sub 
End Class

The next example is similar to the previous example except it shows how to retrieve a physical path from within a class that is not in the code-behind file.

Public Class SampleClass
    Public Function GetFilePath() As String 
        Return HttpContext.Current.Server.MapPath("/UploadedFiles")
    End Function 
End Class

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
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