ApplicationBase.GetEnvironmentVariable(String) Method

Reference

Definition

Namespace:: Microsoft.VisualBasic.ApplicationServices

Assembly:: Microsoft.VisualBasic.dll

Assembly:: Microsoft.VisualBasic.Forms.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Returns the value of the specified environment variable.

public:
 System::String ^ GetEnvironmentVariable(System::String ^ name);

public string GetEnvironmentVariable (string name);

member this.GetEnvironmentVariable : string -> string

Public Function GetEnvironmentVariable (name As String) As String

Parameters

name: String

A String containing the name of the environment variable.

Returns

String

A String containing the value of the environment variable with the name name.

Exceptions

ArgumentNullException

name is Nothing.

ArgumentException

The environment variable specified by name does not exist.

SecurityException

The calling code does not have EnvironmentPermission with Read access.

Examples

This example uses the My.Application.GetEnvironmentVariable method to get and display the value of the PATH environment variable, if available. Otherwise, it displays a message indicating that the PATH environment variable does not exist.

Private Sub TestGetEnvironmentVariable()
    Try
        MsgBox("PATH = " & My.Application.GetEnvironmentVariable("PATH"))
    Catch ex As System.ArgumentException
        MsgBox("Environment variable 'PATH' does not exist.")
    End Try
End Sub

Remarks

The My.Application.GetEnvironmentVariable method returns the environment variable with the name name. This method is similar to Environment.GetEnvironmentVariable(String), except that this method raises an exception if the environment variable specified by name does not exist.

Availability by Project Type

Project type	Available
Windows Forms Application	Yes
Class Library	Yes
Console Application	Yes
Windows Forms Control Library	Yes
Web Control Library	No
Windows Service	Yes
Web Site	No

Applies to

Delen via