如何从文件中删除xml元素

本文关键字:删除 xml 元素 文件 | 更新日期: 2023-09-27 18:16:44

在XML文件中,例如:

<Snippets>
 <Snippet name="abc">
   <SnippetCode>
   code goes here
   </SnippetCode>
 </Snippet>
 <Snippet name="def">
   <SnippetCode>
   code goes here
   </SnippetCode>
 </Snippet>
</Snippets>

当只给定一个元素的属性名称(如abcdef(时,如何删除该元素?

如何从文件中删除xml元素

你可以试试这样的东西:

string xmlInput = @"<Snippets>
 <Snippet name=""abc"">
   <SnippetCode>
   code goes here
   </SnippetCode>
 </Snippet>
 <Snippet name=""def"">
   <SnippetCode>
   code goes here
   </SnippetCode>
 </Snippet>
</Snippets>";
// create the XML, load the contents
XmlDocument doc = new XmlDocument();
doc.LoadXml(xmlInput);
// find a node - here the one with name='abc'
XmlNode node = doc.SelectSingleNode("/Snippets/Snippet[@name='abc']");
// if found....
if (node != null)
{
   // get its parent node
   XmlNode parent = node.ParentNode;
   // remove the child node
   parent.RemoveChild(node);
   // verify the new XML structure
   string newXML = doc.OuterXml;
   // save to file or whatever....
   doc.Save(@"C:'temp'new.xml");
}

如果您能够使用LINQ to XML,那么它确实非常简单:

var doc = XDocument.Load("input.xml");
var query = doc.Descendants("Snippet")
               .Where(x => (string) x.Attribute("name") == "def");
//  Using extension method
query.Remove();

(这个问题被标记为.NET 2.0,但在2022年,假设大多数用户可以使用LINQ to XML似乎是合理的…(

XDocument doc = XDocument.Load("input.xml");
var q = from node in doc.Descendants("Snippet")
    let attr = node.Attribute("name")
    where attr != null && attr.Value == "abc"
    select node;
q.ToList().ForEach(x => x.Remove());
doc.Save("output.xml");

.Net 2.0

XmlDocument doc = new XmlDocument();
doc.Load("input.xml");
XmlNodeList nodes = doc.SelectNodes("//Snippet[@name='abc']");

现在您有了属性名称为'abc'的节点,您现在可以循环通过它并删除

  XElement xEmp = XElement.Load(@"C://Users//Khulu//Documents//Visual Studio 2012//Projects//AMD//Schedule//ToDo.xml");
            //
            xEmp.Add(
                     new XElement("ToDo",
                      new XElement("Item", item),
                       new XElement("date", date),
                        new XElement("time", time),
                        new XElement("due", due),
                        new XElement("description", description))
            );
            xEmp.Save(@"C://Users//Khulu//Documents//Visual Studio 2012//Projects//AMD//Schedule//ToDo.xml");`  XElement xEmp = XElement.Load(@"C://Users//Khulu//Documents//Visual Studio 2012//Projects//AMD//Schedule//ToDo.xml");
            //
            xEmp.Add(
                     new XElement("ToDo",
                      new XElement("Item", item),
                       new XElement("date", date),
                        new XElement("time", time),
                        new XElement("due", due),
                        new XElement("description", description))
            );
            xEmp.Save(@"C://Users//Khulu//Documents//Visual Studio 2012//Projects//AMD//Schedule//ToDo.xml");`