如何使用 Powershell 添加/删除对 csproj 的引用? [英] How do I use Powershell to add/remove references to a csproj?

问题描述

关于 上一个问题 我正在尝试创建一个批处理文件，该文件必须删除并添加对 XML *.csproj 文件的引用.我看过这个，这个，this 和 this 之前的问题，但作为 powershell n00b我无法让它工作(到目前为止).

In relation to this previous question I am trying to create a batch file which as part must remove and add a reference to an XML *.csproj file. I have looked at this, this, this and this previous question but as a powershell n00b am unable to get it working (so far).

有人可以帮我解决以下问题吗?我想删除 VS2010 csproj 文件 (XML) 中的两个特定引用并添加一个新引用.

Can anyone help me with the following? I want to remove two specific references in a VS2010 csproj file (XML) and add a new reference.

我打开了csproj，可以在以下位置找到参考

I opened the csproj and the reference can be found at the following location

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

  <!--          ...         -->
  <!-- Omitted for brevity  -->
  <!--          ...         -->

  <ItemGroup Condition="'$(BuildingInsideVisualStudio)' == 'true'">
    <AvailableItemName Include="Effect" />
  </ItemGroup>
  <ItemGroup>
    <ProjectReference Include="..SomeDirectorySomeProjectFile.csproj">
      <Project>{AAB784E4-F8C6-4324-ABC0-6E9E0F73E575}</Project>
      <Name>SomeProject</Name>
    </ProjectReference>
    <ProjectReference Include="..AnotherDirectoryAnotherProjectFile.csproj">
      <Project>{B0AA6A94-6784-4221-81F0-244A68C374C0}</Project>
      <Name>AnotherProject</Name>
    </ProjectReference>
  </ItemGroup>

  <!--          ...         -->
  <!-- Omitted for brevity  -->
  <!--          ...         -->

</Project>

基本上我想:

• 删除这两个引用
• 插入对由相对路径指定的预编译DLL的新引用
• OR 向相对路径指定的项目添加程序集引用位置

作为一个非常简单的例子，我尝试了以下 powershell 脚本来删除所有 ProjectReference 节点.我将 csproj 的路径作为参数传递.我收到错误 无法验证参数XML".参数为 null 或为空.我可以确认它正在加载 csproj 并将其保存就地未修改，因此路径是正确的.

As a very simple example I have tried the following powershell script to delete all the ProjectReference nodes. I pass the path to csproj as argument. I get the error Cannot validate the argument 'XML'. The Argument is null or empty. I can confirm it is loading the csproj and saving it in-place unmodified so the path is correct.

param($path)
$MsbNS = @{msb = 'http://schemas.microsoft.com/developer/msbuild/2003'}

function RemoveElement([xml]$Project, [string]$XPath, [switch]$SingleNode)
{
    $xml | Select-Xml -XPath $XPath | ForEach-Object{$_.Node.ParentNode.RemoveAll()}
}

$proj = [xml](Get-Content $path)
[System.Console]::WriteLine("Loaded project {0} into {1}", $path, $proj)

RemoveElement $proj "//ProjectReference" -SingleNode

    # Also tried
    # RemoveElement $proj "/Project/ItemGroup/ProjectReference[@Include=`'..SomeDirectorySomeProjectFile.csproj`']" -SingleNode
    # but complains cannot find XPath

$proj.Save($path)

我做错了什么?欢迎任何意见/建议:)

What am I doing wrong? Any comments/suggestions welcome :)

推荐答案

我认为问题在于您的 XML 文件具有默认命名空间 xmlns="http://schemas.microsoft.com/developer/msbuild/2003".这会导致 XPath 出现问题.所以你的 XPath //ProjectReference 将返回 0 个节点.有两种方法可以解决这个问题:

I think the problem is that your XML file has a default namespace xmlns="http://schemas.microsoft.com/developer/msbuild/2003". This causes problems with XPath. So you XPath //ProjectReference will return 0 nodes. There are two ways to solve this:

1. 使用命名空间管理器.
2. 使用与命名空间无关的 XPath.

以下是使用命名空间管理器的方法:

Here's is how you could use a namespace manager:

$nsmgr = New-Object System.Xml.XmlNamespaceManager -ArgumentList $proj.NameTable
$nsmgr.AddNamespace('a','http://schemas.microsoft.com/developer/msbuild/2003')
$nodes = $proj.SelectNodes('//a:ProjectReference', $nsmgr)

或者:

Select-Xml '//a:ProjectReference' -Namespace $nsmgr

以下是使用与命名空间无关的 XPath 的方法:

Here's how to do it using namespace agnostic XPath:

$nodes = $proj.SelectNodes('//*[local-name()="ProjectReference"]')

或者:

$nodes = Select-Xml '//*[local-name()="ProjectReference"]'

第二种方法可能很危险，因为如果有多个命名空间，它可能会选择错误的节点，但不是您的情况.

The second approach can be dangerous because if there were more than one namespace it could select the wrong nodes but not it your case.

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