本文整理汇总了VB.NET中System.EnvironmentVariableTarget枚举的典型用法代码示例。如果您正苦于以下问题:VB.NET EnvironmentVariableTarget枚举的具体用法?VB.NET EnvironmentVariableTarget怎么用?VB.NET EnvironmentVariableTarget使用的例子?那么恭喜您, 这里精选的枚举代码示例或许可以为您提供帮助。
在下文中一共展示了EnvironmentVariableTarget枚举的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于我们的系统推荐出更棒的VB.NET代码示例。
示例1: Main
' 导入命名空间
Imports System.Collections
Imports Microsoft.Win32
Module Sample
Public Sub Main()
' Environment variable names for default, process, user, and machine targets.
Dim defaultEnvVar As String = NameOf(defaultEnvVar)
Dim processEnvVar As String = NameOf(processEnvVar)
Dim userEnvVar As String = NameOf(userEnvVar)
Dim machineEnvVar As String = NameOf(machineEnvVar)
Dim dft As String = NameOf(dft)
Dim process As String = NameOf(process)
Dim user As String = NameOf(user)
Dim machine As String = NameOf(machine)
' Set the environment variable for each target.
Console.WriteLine("Setting environment variables for each target...")
' The default target (the current process).
Environment.SetEnvironmentVariable(defaultEnvVar, dft)
' The current process.
Environment.SetEnvironmentVariable(processEnvVar, process,
EnvironmentVariableTarget.Process)
' The current user.
Environment.SetEnvironmentVariable(userEnvVar, user,
EnvironmentVariableTarget.User)
' The local machine.
Environment.SetEnvironmentVariable(machineEnvVar, machine,
EnvironmentVariableTarget.Machine)
Console.WriteLine()
' Define an array of environment variables.
Dim envVars As String() = { defaultEnvVar, processEnvVar, userEnvVar, machineEnvVar }
' Try to get the environment variables from each target.
' The default (no specified target).
Console.WriteLine("Retrieving environment variables from the default target:")
For Each envVar in envVars
Dim value = Environment.GetEnvironmentVariable(envVar)
Console.WriteLine($" {envVar}: {If(value IsNot Nothing, value, "(none)")}")
Next
Console.WriteLine()
' The process block.
Console.WriteLine("Retrieving environment variables from the Process target:")
For Each envVar in envVars
Dim value = Environment.GetEnvironmentVariable(envVar, EnvironmentVariableTarget.Process)
Console.WriteLine($" {envVar}: {If(value IsNot Nothing, value, "(none)")}")
Next
Console.WriteLine()
' The user block.
Console.WriteLine("Retrieving environment variables from the User target:")
For Each envVar in envVars
Dim value = Environment.GetEnvironmentVariable(envVar, EnvironmentVariableTarget.User)
Console.WriteLine($" {envVar}: {value}")
Next
Console.WriteLine()
' The machine block.
Console.WriteLine("Retrieving environment variables from the Machine target:")
For Each envVar in envVars
Dim value = Environment.GetEnvironmentVariable(envVar, EnvironmentVariableTarget.Machine)
Console.WriteLine($" {envVar}: {value}")
Next
Console.WriteLine()
' Delete the environment variable for each target.
Console.WriteLine("Deleting environment variables for each target...")
' The default target (the current process).
Environment.SetEnvironmentVariable(defaultEnvVar, Nothing)
' The current process.
Environment.SetEnvironmentVariable(processEnvVar, Nothing,
EnvironmentVariableTarget.Process)
' The current user.
Environment.SetEnvironmentVariable(userEnvVar, Nothing,
EnvironmentVariableTarget.User)
' The local machine.
Environment.SetEnvironmentVariable(machineEnvVar, Nothing,
EnvironmentVariableTarget.Machine)
End Sub
End Module
开发者ID:VB.NET开发者,项目名称:System,代码行数:80,代码来源:EnvironmentVariableTarget 输出:
Setting environment variables for each target...
Retrieving environment variables from the default target:
defaultEnvVar: dft
processEnvVar: process
userEnvVar: user
machineEnvVar: (none)
Retrieving environment variables from the Process target:
defaultEnvVar: dft
processEnvVar: process
userEnvVar: user
machineEnvVar: (none)
Retrieving environment variables from the User target:
defaultEnvVar: (none)
processEnvVar: (none)
userEnvVar: user
machineEnvVar: (none)
Retrieving environment variables from the Machine target:
defaultEnvVar: (none)
processEnvVar: (none)
userEnvVar: (none)
machineEnvVar: machine
Deleting environment variables for each target...
The example displays the following output if run on a Unix-based system:
Setting environment variables for each target...
Retrieving environment variables from the default target:
defaultEnvVar: dft
processEnvVar: process
userEnvVar: (none)
machineEnvVar: (none)
Retrieving environment variables from the Process target:
defaultEnvVar: dft
processEnvVar: process
userEnvVar: (none)
machineEnvVar: (none)
Retrieving environment variables from the User target:
defaultEnvVar: (none)
processEnvVar: (none)
userEnvVar: (none)
machineEnvVar: (none)
Retrieving environment variables from the Machine target:
defaultEnvVar: (none)
processEnvVar: (none)
userEnvVar: (none)
machineEnvVar: (none)
Deleting environment variables for each target...
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