如何使用c#中的XMLREADER从XML字符串中读取特定的元素

I have XML String:

我有XML字符串:

   <GroupBy Collapse=\"TRUE\" GroupLimit=\"30\">
      <FieldRef Name=\"Department\" />
   </GroupBy>
   <OrderBy>
      <FieldRef Name=\"Width\" />
   </OrderBy>

I am new in C#. I tried to read the Name attribute of the FieldRef element for both elements but I could not. I used XMLElement , is there any way to pick these two values?

我是c#的新手。我试图读取两个元素的FieldRef元素的Name属性，但我无法读取。我使用了XMLElement，有什么方法来选择这两个值吗?

2 个解决方案

#1

Despite the posting of invalid XML (no root node), an easy way to iterate through the <FieldRef> elements is to use the XmlReader.ReadToFollowing method:

尽管发布了无效的XML(没有根节点)，但通过元素进行迭代的一种简单方法是使用XmlReader。ReadToFollowing方法:

//Keep reading until there are no more FieldRef elements
while (reader.ReadToFollowing("FieldRef"))
{
    //Extract the value of the Name attribute
    string value = reader.GetAttribute("Name");
}

Of course a more flexible and fluent interface is provided by LINQ to XML, perhaps it would be easier to use that if available within the .NET framework you are targeting? The code then becomes:

当然，LINQ向XML提供了更灵活、更流畅的接口，如果在您所针对的。net框架中可以使用这个接口，也许会更容易些。代码就变成了:

using System.Xml.Linq;

//Reference to your document
XDocument doc = {document};

/*The collection will contain the attribute values (will only work if the elements
 are descendants and are not direct children of the root element*/
IEnumerable<string> names = doc.Root.Descendants("FieldRef").Select(e => e.Attribute("Name").Value);

#2

-1

try this:

试试这个:

    string xml = "<GroupBy Collapse=\"TRUE\" GroupLimit=\"30\"><FieldRef Name=\"Department\" /></GroupBy><OrderBy> <FieldRef Name=\"Width\" /></OrderBy>";
    xml = "<root>" + xml + "</root>";
    XmlDocument doc = new XmlDocument();
    doc.LoadXml(xml);
    foreach (XmlNode node in doc.GetElementsByTagName("FieldRef"))
        Console.WriteLine(node.Attributes["Name"].Value);

#1