C# 如何从xml/scxml获取属性

我试图使用LINQ表达式从scxml文件中的“状态”和“转换”中获取属性

以下是scxml文件：

<?xml version="1.0" encoding="utf-8"?>
<scxml xmlns:musthave="http://musthave.com/scxml/1.0" version="1.0" initial="Start" xmlns="http://www.w3.org/2005/07/scxml">
    <state id="abc" musthave:displaystate="abcd" musthave:attribute1="None" musthave:attribute2="None">
        <transition attribute3="blabla" attribute4="blabla" xmlns=""/>
    </state>
    <state id="bla" musthave:displaystate="ababab" musthave:attribute2="View" musthave:attribute1="View"/>
</scxml> 

如果我在控制台上打印，它会显示：

<scxml xmlns:musthave="http://musthave.com/scxml/1.0" version="1.0" initial="Start" xmlns="http://www.w3.org/2005/07/scxml">
    <state id="abc" musthave:displaystate="abcd" musthave:attribute1="None" musthave:attribute2="None">
        <transition attribute3="blabla" attribute4="blabla" xmlns=""/>
    </state>
    <state id="bla" musthave:displaystate="ababab" musthave:attribute2="View" musthave:attribute1="View"/>
</scxml> 

<state id="abc" musthave:displaystate="abcd" musthave:attribute1="None" musthave:attribute2="None" xmlns:musthave="http://musthave.com/scxml/1.0" xmlns="http://www.w3.org/2005/07/scxml">
  <transition attribute3="blabla" attribute4="blabla" xmlns="" />
</state>



<state id="bla" musthave:displaystate="" musthave:attribute2="View" musthave:attribute1="View" xmlns:musthave="http://musthave.com/scxml/1.0"
xmlns="http://www.w3.org/2005/07/scxml" />

在本例中，当我打印它以查看是否得到id=“abc”时，它不会返回任何内容

尽管如此，如果我运行代码：

foreach (var xNode in scxml.Elements().Select(element => (from test in element.Nodes() select test)).SelectMany(a => a))
{
     Console.WriteLine(xNode);
     Console.WriteLine("\n\n\n");
}

它告诉我：

<scxml xmlns:musthave="http://musthave.com/scxml/1.0" version="1.0" initial="Start" xmlns="http://www.w3.org/2005/07/scxml">
    <state id="abc" musthave:displaystate="abcd" musthave:attribute1="None" musthave:attribute2="None">
        <transition attribute3="blabla" attribute4="blabla" xmlns=""/>
    </state>
    <state id="bla" musthave:displaystate="ababab" musthave:attribute2="View" musthave:attribute1="View"/>
</scxml> 

<state id="abc" musthave:displaystate="abcd" musthave:attribute1="None" musthave:attribute2="None" xmlns:musthave="http://musthave.com/scxml/1.0" xmlns="http://www.w3.org/2005/07/scxml">
  <transition attribute3="blabla" attribute4="blabla" xmlns="" />
</state>



<state id="bla" musthave:displaystate="" musthave:attribute2="View" musthave:attribute1="View" xmlns:musthave="http://musthave.com/scxml/1.0"
xmlns="http://www.w3.org/2005/07/scxml" />

编辑：以下代码也不起作用。控制台警告可能为空（可抑制）。什么也不归还

foreach (var state in scxml.Root.Descendants("state"))
{
    Console.WriteLine(state.Attribute("id"));
}

---

在

scxml

标记中有一个名称空间，因此您需要将其与内部标记一起使用以访问它们。以下是您需要的代码：

XDocument xdoc = XDocument.Load(path_to_xml);
XNamespace ns = "http://www.w3.org/2005/07/scxml";
foreach (var state in xdoc.Descendants(ns + "state"))
{
    Console.WriteLine(state.Attribute("id").Value);
}

---

很抱歉，我没有找到问题所在。@OndrejJanacek，“IdeDeveloper”有一个很好的解决方案。只是想让你知道。=）谢谢，我很感激：）我不会想到这个解决方案。

XDocument xdoc = XDocument.Load(path_to_xml);
XNamespace ns = "http://www.w3.org/2005/07/scxml";
foreach (var state in xdoc.Descendants(ns + "state"))
{
    Console.WriteLine(state.Attribute("id").Value);
}