使用动态xml解析器,我试图加载一个VS项目文件作为XElement。这是项目文件的缩小版本:
<?xml version =1.0encoding =utf-8 > < Project ToolsVersion =4.0DefaultTargets =Buildxmlns =schemas.microsoft/developer/msbuild/2003> < ItemGroup> < / ItemGroup> < ItemGroup> < / ItemGroup> < / Project>文件似乎加载,当我ToString(),我得到的内容。但是,当试图选择元素时,什么也找不到:
XElement元素; public DynamicXmlParser(string fileName) { element = XElement.Load(fileName); } public override bool TryGetMember(GetMemberBinder binder,out object result) { result = null; if(element == null)return false; XElement子元素= element.Element(binder.Name); if(subElement == null)return false; result = new DynamicXmlParser(subElement); return true; }subElement总是空的。
binder.Name 是 ItemGroup
dynamic xmlDoc = new DynamicXmlParser(SampleFileName); Debug.Pring(xmlDoc.ItemGroup.ToString());但是,当我从项目节点中删除所有属性时,subElement将按预期成为一个ItemGroup XElement。为什么当属性在项目节点中时可以返回任何元素?
解决方案您可能要求在空命名空间中的元素,为什么实际上这些元素存在于xmlns =schemas.microsoft/developer/msbuild/2003中。查看XNamespace。
例如尝试:
XNamespace msbuildNs =schemas.microsoft/developer/msbuild/2003 XElement subElement = element.Element(msbuildNs + binder.Name);
Using a dynamic xml parser, I'm trying to load a VS Project file as an XElement. Here is a slimmed down version of the project file:
<?xml version="1.0" encoding="utf-8"?> <Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="schemas.microsoft/developer/msbuild/2003"> <ItemGroup> </ItemGroup> <ItemGroup> </ItemGroup> </Project>The file appears to load in the sense that when I ToString(), I get the contents. However, when trying to pick out elements, nothing is ever found:
XElement element; public DynamicXmlParser( string fileName ) { element = XElement.Load( fileName ); } public override bool TryGetMember( GetMemberBinder binder, out object result ) { result = null; if ( element == null ) return false; XElement subElement = element.Element( binder.Name ); if ( subElement == null ) return false; result = new DynamicXmlParser( subElement ); return true; }subElement is always null.
binder.Name is ItemGroup
dynamic xmlDoc = new DynamicXmlParser( SampleFileName ); Debug.Pring(xmlDoc.ItemGroup.ToString());However, when I remove all attributes from the Project node, subElement becomes an ItemGroup XElement as expected.
Why can I return any elements when the attributes are in the project node?
解决方案You are probably asking for elements in empty namespace why in fact the elements live in xmlns="schemas.microsoft/developer/msbuild/2003". Take a look at XNamespace.
For instance try:
XNamespace msbuildNs = "schemas.microsoft/developer/msbuild/2003" XElement subElement = element.Element(msbuildNs + binder.Name);
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