c#-xml-1.1

 

1.    创建xml

usingSystem.Xml;

voidsetXml(string file)

{

XmlTextWriter writer = newXmlTextWriter(file,System.Text.Encoding.UTF8);

 

writer.WriteStartDocument();

 

//根节点

writer.WriteStartElement("root");

writer.WriteAttributeString("xmlns", "x",null, "urn:1");//指定的前缀、本地名称、命名空间 URI 和值的属性

 

//一级节点

writer.WriteStartElement("aaa","urn:1");//指定的开始标记并将其与给定的命名空间关联起来

       //二级节点

writer.WriteStartElement("a1");

writer.WriteEndElement();

writer.WriteEndElement();

      

writer.WriteEndElement();

writer.Close();

}

 

<?xmlversion="1.0" encoding="utf-8"?>

<rootxmlns:x="urn:1">

  <x:aaa>

    <a1 /></x:aaa>

  <x:bbb />

</root>

 

2.     添加节点

XmlDocumentxmlDoc = new XmlDocument();

xmlDoc.Load(mapPath);

XmlNode root =xmlDoc.SelectSingleNode("Categories");//找到根节点

XmlNodeListxnl = xmlDoc.SelectSingleNode("Categories").ChildNodes;//找到一级节点

private stringmapPath;

 

//创建节点

XmlElement xe1= xmlDoc.CreateElement("Category");

xe1.SetAttribute("id","2");

XmlElementxesub1 = xmlDoc.CreateElement("CategoryId");

xesub1.InnerText= "2";

 

//添加子节点

xe1.AppendChild(xesub1);

root.AppendChild(xe1);

 

//保存

xmlDoc.Save(mapPath);

 

<?xmlversion="1.0" encoding="utf-8"?>

<Categories>

  <Category id="1">

    <CategoryId>1</CategoryId>

  </Category>

  <Category id="2">

    <CategoryId>2</CategoryId>

  </Category>

</Categories>

3.     删除节点

XmlDocumentxmlDoc = new XmlDocument();

xmlDoc.Load(mapPath);

XmlNode root =xmlDoc.SelectSingleNode("Categories");//找到根节点

XmlNodeListxnl = root.ChildNodes;//找到一级节点

private stringmapPath;

 

foreach(XmlNode xn in xnl)

{

XmlElement xe = (XmlElement)xn;

if ( xe.GetAttribute("id") == “” )  { xe.RemoveAll(); }

}

xmlDoc.Save(mapPath);

 

4.     查询节点

XmlDocumentxmlDoc = new XmlDocument();

xmlDoc.Load(mapPath);

XmlNode root =xmlDoc.SelectSingleNode("Categories");//找到根节点

XmlNodeListxnl = root.ChildNodes;//找到一级节点

private stringmapPath;

 

foreach(XmlNode xnf in xnl)

{

XmlElement xe = (XmlElement)xnf;

XmlNodeList xnf1 = xe.ChildNodes;

 

foreach (XmlNode xn2 in xnf1)

{

XmlElement xe5 = (XmlElement)xn2;

Response.Write(xe5.Name +":" + xe5.InnerText + "\n");

   }

}

 

5.     修改节点

XmlDocumentxmlDoc = new XmlDocument();

xmlDoc.Load(mapPath);

XmlNode root =xmlDoc.SelectSingleNode("Categories");//找到根节点

XmlNodeListxnl = root.ChildNodes;//找到一级节点

private stringmapPath;

 

foreach(XmlNode xn in xnl)

{

XmlElement xe = (XmlElement)xn;

if (xe.GetAttribute("id") == “”)

{

XmlNodeList nls = xe.ChildNodes;

foreach (XmlNode xl in nls)

{

XmlElement xel = (XmlElement)xl;

if (xel.Name == "Name")

xel.InnerText = “”;

        }

    }

}

xmlDoc.Save(mapPath);