如何使用 PowerShell 读取/写入 App.config 设置? [英] How do I read/write App.config settings with PowerShell?

问题描述

我想使用 PowerShell 作为我们自动化构建过程的一部分，以便在部署到我们的测试环境时更新 App.config 文件.我该怎么做?

I'd like to use PowerShell as part of our automated build process to update an App.config file while deploying into our test environment. How can I do this?

推荐答案

鉴于此示例 App.config:C:\Sample\App.config:

Given this sample App.config: C:\Sample\App.config:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <connectionStrings>
        <add name="dbConnectionString" 
             connectionString="Data Source=(local);Initial Catalog=Northwind;Integrated Security=True"/>
    </connectionStrings>
</configuration>

以下脚本 C:\Sample\Script.ps1 将读取和写入设置:

The following script, C:\Sample\Script.ps1, will read and write a setting:

# get the directory of this script file
$currentDirectory = [IO.Path]::GetDirectoryName($MyInvocation.MyCommand.Path)
# get the full path and file name of the App.config file in the same directory as this script
$appConfigFile = [IO.Path]::Combine($currentDirectory, 'App.config')
# initialize the xml object
$appConfig = New-Object XML
# load the config file as an xml object
$appConfig.Load($appConfigFile)
# iterate over the settings
foreach($connectionString in $appConfig.configuration.connectionStrings.add)
{
    # write the name to the console
    'name: ' + $connectionString.name
    # write the connection string to the console
    'connectionString: ' + $connectionString.connectionString
    # change the connection string
    $connectionString.connectionString = 'Data Source=(local);Initial Catalog=MyDB;Integrated Security=True'
}
# save the updated config file
$appConfig.Save($appConfigFile)

执行脚本:

PS C:\Sample> .\Script.ps1

输出:

name: dbConnectionString  
connectionString: Data Source=(local);Initial Catalog=Northwind;Integrated Security=True

更新 C:\Sample\App.config:

Updated C:\Sample\App.config:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <connectionStrings>
    <add name="dbConnectionString" 
         connectionString="Data Source=(local);Initial Catalog=MyDB;Integrated Security=True" />
  </connectionStrings>
</configuration>

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