如何从 C# 中的 XmlNode 读取属性值？
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How to read attribute value from XmlNode in C#?
提问by Ashish Ashu
Suppose I have a XmlNode and I want to get the value of an attribute named "Name". How can I do that?
假设我有一个 XmlNode 并且我想获取名为“Name”的属性的值。我怎样才能做到这一点？
XmlTextReader reader = new XmlTextReader(path);
XmlDocument doc = new XmlDocument();
XmlNode node = doc.ReadNode(reader);
foreach (XmlNode chldNode in node.ChildNodes)
{
**//Read the attribute Name**
if (chldNode.Name == Employee)
{
if (chldNode.HasChildNodes)
{
foreach (XmlNode item in node.ChildNodes)
{
}
}
}
}
XML Document:
XML 文档：
<Root>
<Employee Name ="TestName">
<Childs/>
</Root>
采纳答案by Konamiman
Try this:
尝试这个：
string employeeName = chldNode.Attributes["Name"].Value;
回答by balexandre
you can loop through all attributes like you do with nodes
您可以像处理节点一样遍历所有属性
foreach (XmlNode item in node.ChildNodes)
{
// node stuff...
foreach (XmlAttribute att in item.Attributes)
{
// attribute stuff
}
}
回答by rahul
Use
用
item.Attributes["Name"].Value;
to get the value.
以获得价值。
回答by Ari Roth
To expand Konamiman's solution (including all relevant null checks), this is what I've been doing:
为了扩展 Konamiman 的解决方案（包括所有相关的空检查），这就是我一直在做的事情：
if (node.Attributes != null)
{
var nameAttribute = node.Attributes["Name"];
if (nameAttribute != null)
return nameAttribute.Value;
throw new InvalidOperationException("Node 'Name' not found.");
}
回答by an phu
if all you need is the names, use xpath instead. No need to do the iteration yourself and check for null.
如果您只需要名称，请改用 xpath。无需自己进行迭代并检查是否为空。
string xml = @"
<root>
<Employee name=""an"" />
<Employee name=""nobyd"" />
<Employee/>
</root>
";
var doc = new XmlDocument();
//doc.Load(path);
doc.LoadXml(xml);
var names = doc.SelectNodes("//Employee/@name");
回答by cell-in
You can also use this;
你也可以使用这个；
string employeeName = chldNode.Attributes().ElementAt(0).Name
回答by Marco7757
If you use chldNodeas XmlElementinstead of XmlNode, you can use
如果您使用chldNodeasXmlElement而不是XmlNode，则可以使用
var attributeValue = chldNode.GetAttribute("Name");
The return value will just be an empty string, in case the attribute name does not exist.
该返回值只是一个空字符串，如果属性名称不存在。
So your loop could look like this:
所以你的循环可能是这样的：
XmlDocument document = new XmlDocument();
var nodes = document.SelectNodes("//Node/N0de/node");
foreach (XmlElement node in nodes)
{
var attributeValue = node.GetAttribute("Name");
}
This will select all nodes <node>surrounded by <Node><N0de></N0de><Node>tags and subsequently loop through them and read the attribute "Name".
这将选择<node>被<Node><N0de></N0de><Node>标签包围的所有节点，然后循环遍历它们并读取属性“名称”。
回答by TaW
Yet another solution:
另一个解决方案：
string s = "??"; // or whatever
if (chldNode.Attributes.Cast<XmlAttribute>()
.Select(x => x.Value)
.Contains(attributeName))
s = xe.Attributes[attributeName].Value;
It also avoids the exception when the expected attribute attributeNameactually doesn't exist.
当预期的属性attributeName实际上不存在时，它还避免了异常。
