Question

我一直在努力获取XML的某些特定节点。问题是节点可能存在或可能不存在于第n级。我在下面分享了我的XML：

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <ItemGroup>
    <Filter Include="Header Files">
      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
      <Extensions>h;hpp;hxx;hm;inl;inc;xsd</Extensions>
    </Filter>

    <Filter Include="Source Files - BT">
      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
    </Filter>

    <Filter Include="Source Files - BT\TreeViewsnTraversals">
      <UniqueIdentifier>{b685be7e-9d62-4f78-817c-def75db39d24}</UniqueIdentifier>
    </Filter>
  </ItemGroup>

  <ItemGroup>
    <ClCompile Include="..\4_Trees\SizeofBTree_Iterative.cpp">
      <Filter>Source Files - BT\TreeProperties</Filter>
    </ClCompile>
    <ClCompile Include="..\4_Trees\SizeofBTree_Recursive.cpp">
      <Filter>Source Files - BT\TreeProperties</Filter>
    </ClCompile>
    <ClCompile Include="..\4_Trees\LevelOrder_Left2Right.cpp">
      <Filter>Source Files - BT\TreeViewsnTraversals</Filter>
    </ClCompile>
    <ClCompile Include="..\4_Trees\LevelOrder_Right2Left.cpp">
      <Filter>Source Files - BT\TreeViewsnTraversals</Filter>
    </ClCompile>
    <ClCompile Include="..\4_Trees\PrintLeaftoNode.cpp">
      <Filter>Source Files - BT\TreeViewsnTraversals</Filter>
    </ClCompile>
    <ClCompile Include="..\4_Trees\VerticalOrderSUM.cpp">
  </ItemGroup>
</Project>

如何仅获取＆＃34; ClCompile＆＃34;节点（以及相应的＆＃34;过滤器＆＃34;节点）

正如您所看到的，这是ClCompile作为＆＃34; ItemGroup＆＃34;的后代节点。和ItemGroup可能包含也可能不包含ClCompile。

我尝试在C＃语法中使用LINQ for XML，但我失败了！

XElement filterxml = XElement.Load(filterfilepath);
var sourcefiles = filterxml.Elements("Project").Elements("ItemGroup").Elements("ClCompile");

如何解决这个问题？

Answer 1

不要忘记使用默认的xml命名空间

var xDoc = XDocument.Load(filename);
XNamespace ns = xDoc.Root.GetDefaultNamespace();
//OR XNamespace ns = "http://schemas.microsoft.com/developer/msbuild/2003";

var nodes = xDoc.Descendants(ns + "ClCompile").ToList();

要获取Filter元素，您只需要

var filter = nodes[i].Element(ns + "Filter");

如何使用LINQ for XML获取仅存在于少数父项中的某些特定XML节点？

1 个答案: