C#操作XML文件實例匯總

C#操作XML文件實例匯總。本站提示廣大學習愛好者：（C#操作XML文件實例匯總）文章只能為提供參考，不一定能成為您想要的結果。以下是C#操作XML文件實例匯總正文

針對XML文件的操作是C#法式設計中異常罕見的功效。本文即以實例展現了C#操作XML文件的幾個罕見的示例。詳細以下：

1.前往節點下標

public static XmlDocument getDoc(String path)//加載xml文檔
{
  XmlDocument doc = new XmlDocument();
  doc.Load(path);
  return doc;
} 
/// <summary>
/// 前往找到的節點下標
/// </summary>
/// <param name="path">xml文件途徑</param>
/// <param name="bname">書名</param>
/// <returns></returns>
public static int getPosition(String path,string node, String bname)
{
  int i;
  XmlDocument doc = new XmlDocument();
  doc.Load(path);
  XmlNodeList nodeList = doc.SelectSingleNode(node).ChildNodes;
  for (i = 0; i < nodeList.Count; i++)
  {
 if (nodeList[i].ChildNodes[0].InnerText == bname)
 {
   return i;
 }
  }
  return -1;
}

2.遍歷數據

/// <summary>
/// 遍歷數據
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void btnRead_Click(object sender, EventArgs e)
{

  XmlDocument doc = getDoc("books.xml");//加載xml文檔，books文件寄存於
  foreach (XmlElement root in doc.DocumentElement.ChildNodes)//遍歷根的子節點
  {
 Response.Write("<script>document.write('<br/>');</script>");
 Response.Write("<script>document.write('" + root.Name + "');</script>");//節點名root.Name book
 foreach (XmlElement item in root.ChildNodes)
 {
   Response.Write("<script>document.write('" + item.Name + "'+':'+'" + item.InnerText + "');</script>");//輸入節點名和文本節點的值
   Response.Write("<script>document.write('<br/>');</script>");
 }
  }
}

3.查找

/// <summary>
/// 查找
/// </summary>
/// <param name="path">文件途徑</param>
/// <param name="node">節點</param>
/// <param name="bname">查找症結字</param>
/// <returns>XmlNode</returns>
public static XmlNode Find(string path,string node,string bname)
{
  XmlDocument doc = new XmlDocument();
  doc.Load(path);//加載xml文檔
  XmlNodeList nodeList = doc.SelectSingleNode(node).ChildNodes;
  int i = getPosition(path, node, bname);//
  if (i >= 0)
 return nodeList[i];
  else
 return null;
}

4.刪除節點

/// <summary>
/// 刪除元素、屬性
/// </summary>
/// <param name="path">文件</param>
/// <param name="node">指定節點的父節點</param>
/// <param name="attribute">為空時刪除節點，不然刪除屬性</param>
/// <param name="bname"></param>
public static void Delete(string path,string node,string attribute,string bname)
{
  XmlDocument doc = new XmlDocument();
  doc.Load(path);
  XmlNode root = doc.SelectSingleNode(node);
  XmlNodeList nodeList = doc.SelectSingleNode(node).ChildNodes;
  int i = getPosition(path, node, bname);//前往指定的節點下標
  if (i >= 0)
  {
 if (attribute.Equals(""))
 {
   root.RemoveChild(nodeList[i]);
 }
 else
 {
   XmlElement xn = (XmlElement)nodeList[i];
   xn.RemoveAttribute(attribute);
 }
  }
  doc.Save(path);
}

5.添加

/// <summary>
/// 添加元素值
/// </summary>
/// <param name="path"></param>
/// <param name="node"></param>
/// <param name="element"></param>
/// <param name="value"></param>
/// <param name="i">拔出的下標，假如為負，默許從最初一個節點拔出</param>
/// <returns></returns>
public static bool Add(string path,string node,string element,string value,int i)
{
  XmlDocument doc = new XmlDocument();
  doc.Load(path);
  XmlNodeList nodeList = doc.SelectNodes(node);
  XmlNode newNode = doc.SelectSingleNode(node).LastChild;
  if (i < 0 || i > nodeList.Count-1)//假如小於0或許年夜於節點長度，默許從最初一個節點添加
  {
 XmlElement newElement = doc.CreateElement(element);//創立元素
 newElement.InnerText = value;//賦值
 newNode.AppendChild(newElement);
  }
  else
  {
 XmlElement newElement = doc.CreateElement(element);
 newElement.InnerText = value;
 nodeList[i - 1].AppendChild(newElement);
  }
  doc.Save(path);
  return true;
}

願望本文所述辦法對年夜家的C#法式設計能有所贊助。