C#自定义处理xml数据类实例

本文实例讲述了C#自定义处理xml数据类。分享给大家供大家参考。具体分析如下：

这个C#类专门用户处理xml数据，可以大大简化xml的操作，类中封装了常用的xml操作，包括打开、读取xml数据，读取、写入节点数据，通过xpath读取节点数据，导出节点数据等等，还可以根据需要自己扩充类的功能。

using System;
using System.Data;
using System.IO;
using System.Xml;
namespace DotNet.Utilities
{
  public class XMLProcess
  {
    #region 构造函数
    public XMLProcess()
    { }
    public XMLProcess(string strPath)
    {
      this._XMLPath = strPath;
    }
    #endregion
    #region 公有属性
    private string _XMLPath;
    public string XMLPath
    {
      get { return this._XMLPath; }
    }
    #endregion
    #region 私有方法
    /// <summary>
    /// 导入XML文件
    /// </summary>
    /// <param name="XMLPath">XML文件路径</param>
    private XmlDocument XMLLoad()
    {
      string XMLFile = XMLPath;
      XmlDocument xmldoc = new XmlDocument();
      try
      {
        string filename = AppDomain.CurrentDomain.BaseDirectory.ToString() + XMLFile;
        if (File.Exists(filename)) xmldoc.Load(filename);
      }
      catch (Exception e)
      { }
      return xmldoc;
    }
    /// <summary>
    /// 导入XML文件
    /// </summary>
    /// <param name="XMLPath">XML文件路径</param>
    private static XmlDocument XMLLoad(string strPath)
    {
      XmlDocument xmldoc = new XmlDocument();
      try
      {
        string filename = AppDomain.CurrentDomain.BaseDirectory.ToString() + strPath;
        if (File.Exists(filename)) xmldoc.Load(filename);
      }
      catch (Exception e)
      { }
      return xmldoc;
    }
    /// <summary>
    /// 返回完整路径
    /// </summary>
    /// <param name="strPath">Xml的路径</param>
    private static string GetXmlFullPath(string strPath)
    {
      if (strPath.IndexOf(":") > 0)
      {
        return strPath;
      }
      else
      {
        return System.Web.HttpContext.Current.Server.MapPath(strPath);
      }
    }
    #endregion
    #region 读取数据
    /// <summary>
    /// 读取指定节点的数据
    /// </summary>
    /// <param name="node">节点</param>
    /// 使用示列:
    /// XMLProsess.Read("/Node", "")
    /// XMLProsess.Read("/Node/Element[@Attribute='Name']")
    public string Read(string node)
    {
      string value = "";
      try
      {
        XmlDocument doc = XMLLoad();
        XmlNode xn = doc.SelectSingleNode(node);
        value = xn.InnerText;
      }
      catch { }
      return value;
    }
    /// <summary>
    /// 读取指定路径和节点的串联值
    /// </summary>
    /// <param name="path">路径</param>
    /// <param name="node">节点</param>
    /// <param name="attribute">属性名，非空时返回该属性值，否则返回串联值</param>
    /// 使用示列:
    /// XMLProsess.Read(path, "/Node", "")
    /// XMLProsess.Read(path, "/Node/Element[@Attribute='Name']")
    public static string Read(string path, string node)
    {
      string value = "";
      try
      {
        XmlDocument doc = XMLLoad(path);
        XmlNode xn = doc.SelectSingleNode(node);
        value = xn.InnerText;
      }
      catch { }
      return value;
    }
    /// <summary>
    /// 读取指定路径和节点的属性值
    /// </summary>
    /// <param name="path">路径</param>
    /// <param name="node">节点</param>
    /// <param name="attribute">属性名，非空时返回该属性值，否则返回串联值</param>
    /// 使用示列:
    /// XMLProsess.Read(path, "/Node", "")
    /// XMLProsess.Read(path, "/Node/Element[@Attribute='Name']", "Attribute")
    public static string Read(string path, string node, string attribute)
    {
      string value = "";
      try
      {
        XmlDocument doc = XMLLoad(path);
        XmlNode xn = doc.SelectSingleNode(node);
        value = (attribute.Equals("") ? xn.InnerText : xn.Attributes[attribute].Value);
      }
      catch { }
      return value;
    }
    /// <summary>
    /// 获取某一节点的所有孩子节点的值
    /// </summary>
    /// <param name="node">要查询的节点</param>
    public string[] ReadAllChildallValue(string node)
    {
      int i = 0;
      string[] str = { };
      XmlDocument doc = XMLLoad();
      XmlNode xn = doc.SelectSingleNode(node);
      XmlNodeList nodelist = xn.ChildNodes; //得到该节点的子节点
      if (nodelist.Count > 0)
      {
        str = new string[nodelist.Count];
        foreach (XmlElement el in nodelist)//读元素值
        {
          str[i] = el.Value;
          i++;
        }
      }
      return str;
    }
    /// <summary>
    /// 获取某一节点的所有孩子节点的值
    /// </summary>
    /// <param name="node">要查询的节点</param>
    public XmlNodeList ReadAllChild(string node)
    {
      XmlDocument doc = XMLLoad();
      XmlNode xn = doc.SelectSingleNode(node);
      XmlNodeList nodelist = xn.ChildNodes; //得到该节点的子节点
      return nodelist;
    }
    /// <summary>
    /// 读取XML返回经排序或筛选后的DataView
    /// </summary>
    /// <param name="strWhere">筛选条件，如:"name='kgdiwss'"</param>
    /// <param name="strSort"> 排序条件，如:"Id desc"</param>
    public DataView GetDataViewByXml(string strWhere, string strSort)
    {
      try
      {
        string XMLFile = this.XMLPath;
        string filename = AppDomain.CurrentDomain.BaseDirectory.ToString() + XMLFile;
        DataSet ds = new DataSet();
        ds.ReadXml(filename);
        DataView dv = new DataView(ds.Tables[0]); //创建DataView来完成排序或筛选操作
        if (strSort != null)
        {
          dv.Sort = strSort; //对DataView中的记录进行排序
        }
        if (strWhere != null)
        {
          dv.RowFilter = strWhere; //对DataView中的记录进行筛选，找到我们想要的记录
        }
        return dv;
      }
      catch (Exception)
      {
        return null;
      }
    }
    /// <summary>
    /// 读取XML返回DataSet
    /// </summary>
    /// <param name="strXmlPath">XML文件相对路径</param>
    public DataSet GetDataSetByXml(string strXmlPath)
    {
      try
      {
        DataSet ds = new DataSet();
        ds.ReadXml(GetXmlFullPath(strXmlPath));
        if (ds.Tables.Count > 0)
        {
          return ds;
        }
        return null;
      }
      catch (Exception)
      {
        return null;
      }
    }
    #endregion
    #region 插入数据
    /// <summary>
    /// 插入数据
    /// </summary>
    /// <param name="path">路径</param>
    /// <param name="node">节点</param>
    /// <param name="element">元素名，非空时插入新元素，否则在该元素中插入属性</param>
    /// <param name="attribute">属性名，非空时插入该元素属性值，否则插入元素值</param>
    /// <param name="value">值</param>
    /// 使用示列:
    /// XMLProsess.Insert(path, "/Node", "Element", "", "Value")
    /// XMLProsess.Insert(path, "/Node", "Element", "Attribute", "Value")
    /// XMLProsess.Insert(path, "/Node", "", "Attribute", "Value")
    public static void Insert(string path, string node, string element, string attribute, string value)
    {
      try
      {
        XmlDocument doc = new XmlDocument();
        doc.Load(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
        XmlNode xn = doc.SelectSingleNode(node);
        if (element.Equals(""))
        {
          if (!attribute.Equals(""))
          {
            XmlElement xe = (XmlElement)xn;
            xe.SetAttribute(attribute, value);
          }
        }
        else
        {
          XmlElement xe = doc.CreateElement(element);
          if (attribute.Equals(""))
            xe.InnerText = value;
          else
            xe.SetAttribute(attribute, value);
          xn.AppendChild(xe);
        }
        doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
      }
      catch { }
    }
    /// <summary>
    /// 插入数据
    /// </summary>
    /// <param name="path">路径</param>
    /// <param name="node">节点</param>
    /// <param name="element">元素名，非空时插入新元素，否则在该元素中插入属性</param>
    /// <param name="strList">由XML属性名和值组成的二维数组</param>
    public static void Insert(string path, string node, string element, string[][] strList)
    {
      try
      {
        XmlDocument doc = new XmlDocument();
        doc.Load(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
        XmlNode xn = doc.SelectSingleNode(node);
        XmlElement xe = doc.CreateElement(element);
        string strAttribute = "";
        string strValue = "";
        for (int i = 0; i < strList.Length; i++)
        {
          for (int j = 0; j < strList[i].Length; j++)
          {
            if (j == 0)
              strAttribute = strList[i][j];
            else
              strValue = strList[i][j];
          }
          if (strAttribute.Equals(""))
            xe.InnerText = strValue;
          else
            xe.SetAttribute(strAttribute, strValue);
        }
        xn.AppendChild(xe);
        doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
      }
      catch { }
    }
    /// <summary>
    /// 插入一行数据
    /// </summary>
    /// <param name="strXmlPath">XML文件相对路径</param>
    /// <param name="Columns">要插入行的列名数组，如：string[] Columns = {"name","IsMarried"};</param>
    /// <param name="ColumnValue">要插入行每列的值数组，如：string[] ColumnValue={"XML大全","false"};</param>
    /// <returns>成功返回true,否则返回false</returns>
    public static bool WriteXmlByDataSet(string strXmlPath, string[] Columns, string[] ColumnValue)
    {
      try
      {
        //根据传入的XML路径得到.XSD的路径，两个文件放在同一个目录下
        string strXsdPath = strXmlPath.Substring(0, strXmlPath.IndexOf(".")) + ".xsd";
        DataSet ds = new DataSet();
        ds.ReadXmlSchema(GetXmlFullPath(strXsdPath)); //读XML架构，关系到列的数据类型
        ds.ReadXml(GetXmlFullPath(strXmlPath));
        DataTable dt = ds.Tables[0];
        DataRow newRow = dt.NewRow(); //在原来的表格基础上创建新行
        for (int i = 0; i < Columns.Length; i++) //循环给一行中的各个列赋值
        {
          newRow[Columns[i]] = ColumnValue[i];
        }
        dt.Rows.Add(newRow);
        dt.AcceptChanges();
        ds.AcceptChanges();
        ds.WriteXml(GetXmlFullPath(strXmlPath));
        return true;
      }
      catch (Exception)
      {
        return false;
      }
    }
    #endregion
    #region 修改数据
    /// <summary>
    /// 修改指定节点的数据
    /// </summary>
    /// <param name="node">节点</param>
    /// <param name="value">值</param>
    public void Update(string node, string value)
    {
      try
      {
        XmlDocument doc = XMLLoad();
        XmlNode xn = doc.SelectSingleNode(node);
        xn.InnerText = value;
        doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + XMLPath);
      }
      catch { }
    }
    /// <summary>
    /// 修改指定节点的数据
    /// </summary>
    /// <param name="path">路径</param>
    /// <param name="node">节点</param>
    /// <param name="value">值</param>
    /// 使用示列:
    /// XMLProsess.Insert(path, "/Node","Value")
    /// XMLProsess.Insert(path, "/Node","Value")
    public static void Update(string path, string node, string value)
    {
      try
      {
        XmlDocument doc = XMLLoad(path);
        XmlNode xn = doc.SelectSingleNode(node);
        xn.InnerText = value;
        doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
      }
      catch { }
    }
    /// <summary>
    /// 修改指定节点的属性值(静态)
    /// </summary>
    /// <param name="path">路径</param>
    /// <param name="node">节点</param>
    /// <param name="attribute">属性名，非空时修改该节点属性值，否则修改节点值</param>
    /// <param name="value">值</param>
    /// 使用示列:
    /// XMLProsess.Insert(path, "/Node", "", "Value")
    /// XMLProsess.Insert(path, "/Node", "Attribute", "Value")
    public static void Update(string path, string node, string attribute, string value)
    {
      try
      {
        XmlDocument doc = XMLLoad(path);
        XmlNode xn = doc.SelectSingleNode(node);
        XmlElement xe = (XmlElement)xn;
        if (attribute.Equals(""))
          xe.InnerText = value;
        else
          xe.SetAttribute(attribute, value);
        doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
      }
      catch { }
    }
    /// <summary>
    /// 更改符合条件的一条记录
    /// </summary>
    /// <param name="strXmlPath">XML文件路径</param>
    /// <param name="Columns">列名数组</param>
    /// <param name="ColumnValue">列值数组</param>
    /// <param name="strWhereColumnName">条件列名</param>
    /// <param name="strWhereColumnValue">条件列值</param>
    public static bool UpdateXmlRow(string strXmlPath, string[] Columns, string[] ColumnValue, string strWhereColumnName, string strWhereColumnValue)
    {
      try
      {
        string strXsdPath = strXmlPath.Substring(0, strXmlPath.IndexOf(".")) + ".xsd";
        DataSet ds = new DataSet();
        ds.ReadXmlSchema(GetXmlFullPath(strXsdPath));//读XML架构，关系到列的数据类型
        ds.ReadXml(GetXmlFullPath(strXmlPath));
        //先判断行数
        if (ds.Tables[0].Rows.Count > 0)
        {
          for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
          {
            //如果当前记录为符合Where条件的记录
            if (ds.Tables[0].Rows[i][strWhereColumnName].ToString().Trim().Equals(strWhereColumnValue))
            {
              //循环给找到行的各列赋新值
              for (int j = 0; j < Columns.Length; j++)
              {
                ds.Tables[0].Rows[i][Columns[j]] = ColumnValue[j];
              }
              ds.AcceptChanges();           //更新DataSet
              ds.WriteXml(GetXmlFullPath(strXmlPath));//重新写入XML文件
              return true;
            }
          }
        }
        return false;
      }
      catch (Exception)
      {
        return false;
      }
    }
    #endregion
    #region 删除数据
    /// <summary>
    /// 删除节点值
    /// </summary>
    /// <param name="path">路径</param>
    /// <param name="node">节点</param>
    /// <param name="attribute">属性名，非空时删除该节点属性值，否则删除节点值</param>
    /// <param name="value">值</param>
    /// 使用示列:
    /// XMLProsess.Delete(path, "/Node", "")
    /// XMLProsess.Delete(path, "/Node", "Attribute")
    public static void Delete(string path, string node)
    {
      try
      {
        XmlDocument doc = XMLLoad(path);
        XmlNode xn = doc.SelectSingleNode(node);
        xn.ParentNode.RemoveChild(xn);
        doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
      }
      catch { }
    }
    /// <summary>
    /// 删除数据
    /// </summary>
    /// <param name="path">路径</param>
    /// <param name="node">节点</param>
    /// <param name="attribute">属性名，非空时删除该节点属性值，否则删除节点值</param>
    /// <param name="value">值</param>
    /// 使用示列:
    /// XMLProsess.Delete(path, "/Node", "")
    /// XMLProsess.Delete(path, "/Node", "Attribute")
    public static void Delete(string path, string node, string attribute)
    {
      try
      {
        XmlDocument doc = XMLLoad(path);
        XmlNode xn = doc.SelectSingleNode(node);
        XmlElement xe = (XmlElement)xn;
        if (attribute.Equals(""))
          xn.ParentNode.RemoveChild(xn);
        else
          xe.RemoveAttribute(attribute);
        doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
      }
      catch { }
    }
    /// <summary>
    /// 删除所有行
    /// </summary>
    /// <param name="strXmlPath">XML路径</param>
    public static bool DeleteXmlAllRows(string strXmlPath)
    {
      try
      {
        DataSet ds = new DataSet();
        ds.ReadXml(GetXmlFullPath(strXmlPath));
        if (ds.Tables[0].Rows.Count > 0)
        {
          ds.Tables[0].Rows.Clear();
        }
        ds.WriteXml(GetXmlFullPath(strXmlPath));
        return true;
      }
      catch (Exception)
      {
        return false;
      }
    }
    /// <summary>
    /// 通过删除DataSet中指定索引行，重写XML以实现删除指定行
    /// </summary>
    /// <param name="iDeleteRow">要删除的行在DataSet中的Index值</param>
    public static bool DeleteXmlRowByIndex(string strXmlPath, int iDeleteRow)
    {
      try
      {
        DataSet ds = new DataSet();
        ds.ReadXml(GetXmlFullPath(strXmlPath));
        if (ds.Tables[0].Rows.Count > 0)
        {
          ds.Tables[0].Rows[iDeleteRow].Delete();
        }
        ds.WriteXml(GetXmlFullPath(strXmlPath));
        return true;
      }
      catch (Exception)
      {
        return false;
      }
    }
    /// <summary>
    /// 删除指定列中指定值的行
    /// </summary>
    /// <param name="strXmlPath">XML相对路径</param>
    /// <param name="strColumn">列名</param>
    /// <param name="ColumnValue">指定值</param>
    public static bool DeleteXmlRows(string strXmlPath, string strColumn, string[] ColumnValue)
    {
      try
      {
        DataSet ds = new DataSet();
        ds.ReadXml(GetXmlFullPath(strXmlPath));
        if (ds.Tables[0].Rows.Count > 0)
        {
          //判断行多还是删除的值多，多的for循环放在里面
          if (ColumnValue.Length > ds.Tables[0].Rows.Count)
          {
            for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
            {
              for (int j = 0; j < ColumnValue.Length; j++)
              {
                if (ds.Tables[0].Rows[i][strColumn].ToString().Trim().Equals(ColumnValue[j]))
                {
                  ds.Tables[0].Rows[i].Delete();
                }
              }
            }
          }
          else
          {
            for (int j = 0; j < ColumnValue.Length; j++)
            {
              for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
              {
                if (ds.Tables[0].Rows[i][strColumn].ToString().Trim().Equals(ColumnValue[j]))
                {
                  ds.Tables[0].Rows[i].Delete();
                }
              }
            }
          }
          ds.WriteXml(GetXmlFullPath(strXmlPath));
        }
        return true;
      }
      catch (Exception)
      {
        return false;
      }
    }
    #endregion
  }
}

希望本文所述对大家的C#程序设计有所帮助。