XmlPoke和唯一节点 [英] XmlPoke and unique nodes

问题描述

我正在尝试使用xmlpoke任务来更新VS Project文件(它是XML).在项目根目录中，有多个PropertyGroup节点，我试图选择第一个. XML看起来像这样

I am trying to use an xmlpoke task to update a VS Project File (which is XML). In the Project root, there are multiple PropertyGroup nodes, I am trying to select the first one. The XML looks like this

 <Project>
    <PropertyGroup>
    </PropertyGroup>
    <PropertyGroup>
    </PropertyGroup>
    <PropertyGroup>
    </PropertyGroup>
 </Project>

我正在使用//Project/PropertyGroup[1]的xpath来获取第一个PropertyGroup，但出现错误:给定//Project/PropertyGroup [1]的非唯一xpath".

I am using an xpath of //Project/PropertyGroup[1] to get the first PropertyGroup, but I get the error: "Non-unique xpath given //Project/PropertyGroup[1]".

edit:抱歉，我认为这没关系(但确实如此)，Project有一个命名空间.我将带有正确xmlpoke的正确XML用作将来任何搜索者的答案.

edit: sorry, I didn't think it mattered (but it does), Project has a namespace. I put the correct XML with the correct xmlpoke as an answer for any future searchers.

推荐答案

好吧，我在上面简化了XML片段，如果没有的话，我想有人会弄清楚的.答案是，由于Project具有名称空间，因此必须像这样

Ok, I simplified the XML snippet above too much -- I think someone would have figured it out if I hadn't. The answer is that since Project has a namespace, it needs to be like this

   <xmlpoke file="project_file.csproj" value="v4.0" xpath="//x:Project/x:PropertyGroup[1]/x:TargetFrameworkVersion">
    <namespaces>
      <namespace prefix="x" uri="http://schemas.microsoft.com/developer/msbuild/2003" />
    </namespaces>
   </xmlpoke>

作为参考，Project标记如下所示:

For reference, the Project tag looks like this:

  <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" DefaultTargets="Build">

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