C#创建读取写入XML文件的实例代码分享

本篇文章主要介绍了c# 创建，读取，写入xml文件的方法，具有很好的参考价值。下面跟着小编一起来看下吧

Xml文件如下：

 
 
  
 001.jpg 
 001.aspx 
 10 
 gucas01 
  
  
 002.jpg 
 002.aspx 
 20 
 gucas02 
  
  
 003.jpg 
 003.aspx 
 30 
 gucas03 
  
  
 004.jpg 
 004.aspx 
 40 
 gucas04 
  
  
 005.jpg 
 005.aspx 
 50 
 gucas05 
  
  
 google.gif 
 http://www.google.com 
 30 
 google 
  

对XML文件的操作

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/// 
 
 /// 创建XML文件 
 /// 
 
 ///  
 public void CreateXmlFile(string filename) 
 { 
  XmlDocument xmldoc = new XmlDocument(); 
  XmlNode node; 
  node = xmldoc.CreateXmlDeclaration("1.0", "utf-8", null); 
  xmldoc.AppendChild(node); 
  XmlNode root = xmldoc.CreateElement("Users"); 
  xmldoc.AppendChild(root); 
  CreateNode(xmldoc, root, "UserName", "zhengyd"); 
  CreateNode(xmldoc, root, "Email", "zhengyd@gucas.ac,cn"); 
  CreateNode(xmldoc, root, "Url", "www.gucas.an,cn"); 
  CreateNode(xmldoc, root, "Age", "27"); 
  try 
  { 
   xmldoc.Save(Server.MapPath(filename)); 
   Response.Write("创建XML文件myxml.xml成功!"); 
  } 
  catch (Exception ex) 
  { 
   Response.Write(ex.Message); 
  } 
 } 
 /// 
 
 /// 写入XML文件 
 /// 
 
 ///  
 public void WriteXmlFile(string file) 
 { 
  XmlDocument xmdoc = new XmlDocument(); 
  try 
  { 
   xmdoc.Load(Server.MapPath(file)); 
   XmlNode root = xmdoc.SelectSingleNode("Advertisements"); 
   if (root != null) 
   { 
    XmlNode node = xmdoc.CreateNode(XmlNodeType.Element, "Ad", null); 
    CreateNode(xmdoc, node, "ImageUrl", "google.gif"); 
    CreateNode(xmdoc, node, "NavigateUrl", "http://www.google.com"); 
    CreateNode(xmdoc, node, "Impressions", "30"); 
    CreateNode(xmdoc, node, "Keyword", "google"); 
    root.AppendChild(node); 
   } 
   xmdoc.Save(Server.MapPath(file)); 
   Response.Write("写入XML文件XMLFile.xml成功。
"); 
  } 
  catch(Exception ex) { 
   Response.Write(ex.Message); 
  } 
 } 
 /// 
 
 /// 创建节点 
 /// 
 
 ///  
 ///  
 ///  
 ///  
 public void CreateNode(XmlDocument xmldoc, XmlNode parentnode, string name, string value) 
 { 
  XmlNode node = xmldoc.CreateNode(XmlNodeType.Element, name, null); 
  node.InnerText = value; 
  parentnode.AppendChild(node); 
 } 
 /// 
 
 /// 读取XML文件 
 /// 
 
 ///  
 private void ReadFile(string file) 
 { 
  XmlDocument xmldoc = new XmlDocument(); 
  try 
  { 
   xmldoc.Load(Server.MapPath(file)); 
   XmlNode node = xmldoc.SelectSingleNode("Advertisements"); 
   if (node != null) 
   { 
    TreeNode root = new TreeNode(); 
    root.Text = node.Name; 
    tvXml.Nodes.Add(root); 
    foreach (XmlNode xnode in xmldoc.SelectNodes("Advertisements/Ad")) 
    { 
     TreeNode tnode = new TreeNode(); 
     tnode.Text = Server.HtmlEncode("<" + xnode.Name + ">"); 
     root.ChildNodes.Add(tnode); 
      foreach (XmlNode xcnode in xnode.ChildNodes) 
      { 
       TreeNode tcnode = new TreeNode(); 
       tcnode.Text = Server.HtmlEncode("<" + xcnode.Name + ">" + xcnode.InnerText + ""); 
       tnode.ChildNodes.Add(tcnode); 
      } 
     TreeNode ttnode = new TreeNode(); 
     ttnode.Text = Server.HtmlEncode(""); 
    tvXml.Nodes.Add(tpnode); 
   } 
  } 
  catch (Exception ex) 
  { 
   Response.Write(ex.Message); 
  } 
 }