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 程式師世界 >> 編程語言 >> .NET網頁編程 >> C# >> C#入門知識 >> C#操作XML通用辦法匯總

C#操作XML通用辦法匯總

編輯:C#入門知識

C#操作XML通用辦法匯總。本站提示廣大學習愛好者:(C#操作XML通用辦法匯總)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通用辦法匯總正文


 在.net的項目開辟中,常常會對XML文件停止操作,因為XML文件可以完成跨平台傳輸,較多的運用在數據傳輸中,特總結以下幾種經常使用的XML操作辦法:

1.創立XML文檔:

  /// <summary>
  /// 創立XML文檔
  /// </summary>
  /// <param name="name">根節點稱號</param>
  /// <param name="type">根節點的一個屬性值</param>
  /// <returns>XmlDocument對象</returns>  
  public static XmlDocument CreateXmlDocument(string name, string type)
  {
   XmlDocument doc;
   try
   {
    doc = new XmlDocument();
    doc.LoadXml("<" + name + "/>");
    var rootEle = doc.DocumentElement;
    rootEle?.SetAttribute("type", type);
   }
   catch (Exception er)
   {
    throw new Exception(er.ToString());
   }
   return doc;
  }

2.讀取XML文檔中的數據:

  /// <summary>
  /// 讀取數據
  /// </summary>
  /// <param name="path">途徑</param>
  /// <param name="node">節點</param>
  /// <param name="attribute">屬性名,非空時前往該屬性值,不然前往串連值</param>
  /// <returns>string</returns>
  public static string Read(string path, string node, string attribute)
  {
   var value = "";
   try
   {
    var doc = new XmlDocument();
    doc.Load(path);
    var xn = doc.SelectSingleNode(node);
    if (xn != null && xn.Attributes != null)
     value = (attribute.Equals("") ? xn.InnerText : xn.Attributes[attribute].Value);
   }
   catch (Exception er)
   {
    throw new Exception(er.ToString());
   }
   return value;
  }

3.對XML文檔拔出數據:

  /// <summary>
  /// 拔出數據
  /// </summary>
  /// <param name="path">途徑</param>
  /// <param name="node">節點</param>
  /// <param name="element">元素名,非空時拔出新元素,不然在該元素中拔出屬性</param>
  /// <param name="attribute">屬性名,非空時拔出該元素屬性值,不然拔出元素值</param>
  /// <param name="value">值</param>
  /// <returns></returns>
  public static void Insert(string path, string node, string element, string attribute, string value)
  {
   try
   {
    var doc = new XmlDocument();
    doc.Load(path);
    var xn = doc.SelectSingleNode(node);
    if (element.Equals(""))
    {
     if (!attribute.Equals(""))
     {
      var xe = (XmlElement)xn;
      xe?.SetAttribute(attribute, value);
      //xe?.SetAttribute(attribute, value);
     }
    }
    else
    {
     var xe = doc.CreateElement(element);
     if (attribute.Equals(""))
      xe.InnerText = value;
     else
      xe.SetAttribute(attribute, value);
     xn?.AppendChild(xe);
    }
    doc.Save(path);
   }
   catch (Exception er)
   {
    throw new Exception(er.ToString());
   }
  }

4.修正XML文檔中的數據:

  /// <summary>
  /// 修正數據
  /// </summary>
  /// <param name="path">途徑</param>
  /// <param name="node">節點</param>
  /// <param name="attribute">屬性名,非空時修正該節點屬性值,不然修正節點值</param>
  /// <param name="value">值</param>
  /// <returns></returns>
  public static void Update(string path, string node, string attribute, string value)
  {
   try
   {
    var doc = new XmlDocument();
    doc.Load(path);
    var xn = doc.SelectSingleNode(node);
    var xe = (XmlElement)xn;
    if (attribute.Equals(""))
    {
     if (xe != null) xe.InnerText = value;
    }
    else
    {
     xe?.SetAttribute(attribute, value);
    }
    doc.Save(path);
   }
   catch (Exception er)
   {
    throw new Exception(er.ToString());
   }
  }

5.刪除XML文檔中數據:

  /// <summary>
  /// 刪除數據
  /// </summary>
  /// <param name="path">途徑</param>
  /// <param name="node">節點</param>
  /// <param name="attribute">屬性名,非空時刪除該節點屬性值,不然刪除節點值</param>
  /// <returns></returns>
  public static void Delete(string path, string node, string attribute)
  {
   try
   {
    var doc = new XmlDocument();
    doc.Load(path);
    var xn = doc.SelectSingleNode(node);
    var xe = (XmlElement)xn;
    if (attribute.Equals(""))
    {
     xn?.ParentNode?.RemoveChild(xn);
    }
    else
    {
     xe?.RemoveAttribute(attribute);
    }
    doc.Save(path);
   }
   catch (Exception er)
   {
    throw new Exception(er.ToString());
   }
  }

6.讀取XML文檔中指定節點數據:

  /// <summary>
  /// 取得xml文件中指定節點的節點數據
  /// </summary>
  /// <param name="path"></param>
  /// <param name="nodeName"></param>
  /// <returns></returns>
  public static string GetNodeInfoByNodeName(string path, string nodeName)
  {
   var xmlString = string.Empty;
   try
   {
    var xml = new XmlDocument();
    xml.Load(path);
    var root = xml.DocumentElement;
    if (root == null) return xmlString;
    var node = root.SelectSingleNode("//" + nodeName);
    if (node != null)
    {
     xmlString = node.InnerText;
    }
   }
   catch (Exception er)
   {
    throw new Exception(er.ToString());
   }
   return xmlString;
  }

7.獲得XML指定節點的屬性:

  /// <summary> 
  /// 功效:讀取指定節點的指定屬性值  
  /// </summary>
  /// <param name="path"></param>
  /// <param name="strNode">節點稱號</param> 
  /// <param name="strAttribute">此節點的屬性</param> 
  /// <returns></returns> 
  public string GetXmlNodeAttributeValue(string path, string strNode, string strAttribute)
  {
   var strReturn = "";
   try
   {
    var xml = new XmlDocument();
    xml.Load(path);
    //依據指定途徑獲得節點 
    var xmlNode = xml.SelectSingleNode(strNode);
    if (xmlNode != null)
    {
     //獲得節點的屬性,並輪回掏出須要的屬性值 
     var xmlAttr = xmlNode.Attributes;
     if (xmlAttr == null) return strReturn;
     for (var i = 0; i < xmlAttr.Count; i++)
     {
      if (xmlAttr.Item(i).Name != strAttribute) continue;
      strReturn = xmlAttr.Item(i).Value;
      break;
     }
    }
   }
   catch (XmlException xmle)
   {
    throw new Exception(xmle.Message);
   }
   return strReturn;
  }

8.設置XML文檔中指定節點的屬性:

 /// <summary> 
  /// 功效:設置節點的屬性值  
  /// </summary>
  /// <param name="path"></param>
  /// <param name="xmlNodePath">節點稱號</param> 
  /// <param name="xmlNodeAttribute">屬性稱號</param> 
  /// <param name="xmlNodeAttributeValue">屬性值</param> 
  public void SetXmlNodeAttributeValue(string path, string xmlNodePath, string xmlNodeAttribute, string xmlNodeAttributeValue)
  {
   try
   {
    var xml = new XmlDocument();
    xml.Load(path);
    //可以批量為相符前提的節點的屬性付值 
    var xmlNode = xml.SelectNodes(xmlNodePath);
    if (xmlNode == null) return;
    foreach (var xmlAttr in from XmlNode xn in xmlNode select xn.Attributes)
    {
     if (xmlAttr == null) return;
     for (var i = 0; i < xmlAttr.Count; i++)
     {
      if (xmlAttr.Item(i).Name != xmlNodeAttribute) continue;
      xmlAttr.Item(i).Value = xmlNodeAttributeValue;
      break;
     }
    }

   }
   catch (XmlException xmle)
   {
    throw new Exception(xmle.Message);
   }
  }

9.讀取XML文檔指定節點的值:

  /// <summary>
  /// 讀取XML資本中的指定節點內容
  /// </summary>
  /// <param name="source">XML資本</param>
  /// <param name="xmlType">XML資本類型:文件,字符串</param>
  /// <param name="nodeName">節點稱號</param>
  /// <returns>節點內容</returns>
  public static object GetNodeValue(string source, XmlType xmlType, string nodeName)
  {
   var xd = new XmlDocument();
   if (xmlType == XmlType.File)
   {
    xd.Load(source);
   }
   else
   {
    xd.LoadXml(source);
   }
   var xe = xd.DocumentElement;
   XmlNode xn = null;
   if (xe != null)
   {
     xn= xe.SelectSingleNode("//" + nodeName);
    
   }
   return xn.InnerText;
  }

10.更新XML文檔指定節點的內容:

  /// <summary>
  /// 更新XML文件中的指定節點內容
  /// </summary>
  /// <param name="filePath">文件途徑</param>
  /// <param name="nodeName">節點稱號</param>
  /// <param name="nodeValue">更新內容</param>
  /// <returns>更新能否勝利</returns>
  public static bool UpdateNode(string filePath, string nodeName, string nodeValue)
  {   
   try
   {
    bool flag;
    var xd = new XmlDocument();
    xd.Load(filePath);
    var xe = xd.DocumentElement;
    if (xe == null) return false;
    var xn = xe.SelectSingleNode("//" + nodeName);
    if (xn != null)
    {
     xn.InnerText = nodeValue;
     flag = true;
    }
    else
    {
     flag = false;
    }
    return flag;
   }
   catch (Exception ex)
   {
    throw new Exception(ex.Message);
   }
   
  }
復制代碼
11.將對象轉化為XML文件,並存入指定目次:

復制代碼
  /// <summary>
  /// 將對象轉化為xml,並寫入指定途徑的xml文件中
  /// </summary>
  /// <typeparam name="T">C#對象名</typeparam>
  /// <param name="item">對象實例</param>
  /// <param name="path">途徑</param>
  /// <param name="jjdbh">標號</param>
  /// <param name="ends">停止符號(全部xml的途徑相似以下:C:\xmltest\201111send.xml,個中path=C:\xmltest,jjdbh=201111,ends=send)</param>
  /// <returns></returns>
  public static string WriteXml<T>(T item, string path, string jjdbh, string ends)
  {
   if (string.IsNullOrEmpty(ends))
   {
    //默許為發送
    ends = "send";
   }
   //掌握寫入文件的次數
   var i = 0;
   //獲得以後對象的類型,也能夠應用反射typeof(對象名)
   var serializer = new XmlSerializer(item.GetType());
   //xml的途徑組合
   object[] obj = { path, "\\", jjdbh, ends, ".xml" };
   var xmlPath = string.Concat(obj);
   while (true)
   {
    try
    {
     //用filestream方法創立文件不會湧現“文件正在占用中,用File.create”則不可
     var fs = System.IO.File.Create(xmlPath);
     fs.Close();
     TextWriter writer = new StreamWriter(xmlPath, false, Encoding.UTF8);
     var xml = new XmlSerializerNamespaces();
     xml.Add(string.Empty, string.Empty);
     serializer.Serialize(writer, item, xml);
     writer.Flush();
     writer.Close();
     break;
    }
    catch (Exception)
    {
     if (i < 5)
     {
      i++;
      continue;
     }
     break;
    }
   }
   return SerializeToXmlStr<T>(item, true);
  }

12.向一個曾經存在的父節點中拔出一個子節點:

  /// <summary> 
  /// 向一個曾經存在的父節點中拔出一個子節點 
  /// </summary>
  /// <param name="path"></param>
  /// <param name="parentNodePath">父節點</param>
  /// <param name="childnodename">子節點稱號</param> 
  public void AddChildNode(string path, string parentNodePath, string childnodename)
  {
   try
   {
    var xml = new XmlDocument();
    xml.Load(path);
    var parentXmlNode = xml.SelectSingleNode(parentNodePath);
    XmlNode childXmlNode = xml.CreateElement(childnodename);
    if ((parentXmlNode) != null)
    {
     //假如此節點存在 
     parentXmlNode.AppendChild(childXmlNode);
    }
    else
    {
     //假如不存在就放父節點添加 
     GetXmlRoot(path).AppendChild(childXmlNode);
    }

   }
   catch (XmlException xmle)
   {
    throw new Exception(xmle.Message);
   }
  }


以上的辦法總結采取.net4.5版本和c#6.0語法,願望對年夜家的進修有所贊助,也願望年夜家多多支撐。

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