本文實例講述了C#自定義處理xml數據類。分享給大家供大家參考。具體分析如下：
這個C#類專門用戶處理xml數據，可以大大簡化xml的操作，類中封裝了常用的xml操作，包括打開、讀取xml數據，讀取、寫入節點數據，通過xpath讀取節點數據，導出節點數據等等，還可以根據需要自己擴充類的功能。
using System;using System.Data;using System.IO;using System.Xml;namespace DotNet.Utilities{ public class XMLProcess { #region 構造函數 public XMLProcess() { } public XMLProcess(string strPath) { this._XMLPath = strPath; } #endregion #region 公有屬性 private string _XMLPath; public string XMLPath { get { return this._XMLPath; } } #endregion #region 私有方法 /// <summary> /// 導入XML文件 /// </summary> /// <param name="XMLPath">XML文件路徑</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> /// 導入XML文件 /// </summary> /// <param name="XMLPath">XML文件路徑</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> /// 返回完整路徑 /// </summary> /// <param name="strPath">Xml的路徑</param> private static string GetXmlFullPath(string strPath) { if (strPath.IndexOf(":") > 0) { return strPath; } else { return System.Web.HttpContext.Current.Server.MapPath(strPath); } } #endregion #region 讀取數據 /// <summary> /// 讀取指定節點的數據 /// </summary> /// <param name="node">節點</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> /// 讀取指定路徑和節點的串聯值 /// </summary> /// <param name="path">路徑</param> /// <param name="node">節點</param> /// <param name="attribute">屬性名，非空時返回該屬性值，否則返回串聯值</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> /// 讀取指定路徑和節點的屬性值 /// </summary> /// <param name="path">路徑</param> /// <param name="node">節點</param> /// <param name="attribute">屬性名，非空時返回該屬性值，否則返回串聯值</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> /// 獲取某一節點的所有孩子節點的值 /// </summary> /// <param name="node">要查詢的節點</param> public string[] ReadAllChildallValue(string node) { int i = 0; string[] str = { }; XmlDocument doc = XMLLoad(); XmlNode xn = doc.SelectSingleNode(node); XmlNodeList nodelist = xn.ChildNodes; //得到該節點的子節點 if (nodelist.Count > 0) { str = new string[nodelist.Count]; foreach (XmlElement el in nodelist)//讀元素值 { str[i] = el.Value; i++; } } return str; } /// <summary> /// 獲取某一節點的所有孩子節點的值 /// </summary> /// <param name="node">要查詢的節點</param> public XmlNodeList ReadAllChild(string node) { XmlDocument doc = XMLLoad(); XmlNode xn = doc.SelectSingleNode(node); XmlNodeList nodelist = xn.ChildNodes; //得到該節點的子節點 return nodelist; } /// <summary> /// 讀取XML返回經排序或篩選后的DataView /// </summary> /// <param name="strWhere">篩選條件，如:"name='kgdiwss'"</param> /// <param name="strSort"> 排序條件，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]); //創建DataView來完成排序或篩選操作 if (strSort != null) { dv.Sort = strSort; //對DataView中的記錄進行排序 } if (strWhere != null) { dv.RowFilter = strWhere; //對DataView中的記錄進行篩選，找到我們想要的記錄 } return dv; } catch (Exception) { return null; } } /// <summary> /// 讀取XML返回DataSet /// </summary> /// <param name="strXmlPath">XML文件相對路徑</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 插入數據 /// <summary> /// 插入數據 /// </summary> /// <param name="path">路徑</param> /// <param name="node">節點</param> /// <param name="element">元素名，非空時插入新元素，否則在該元素中插入屬性</param> /// <param name="attribute">屬性名，非空時插入該元素屬性值，否則插入元素值</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> /// 插入數據 /// </summary> /// <param name="path">路徑</param> /// <param name="node">節點</param> /// <param name="element">元素名，非空時插入新元素，否則在該元素中插入屬性</param> /// <param name="strList">由XML屬性名和值組成的二維數組</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> /// 插入一行數據 /// </summary> /// <param name="strXmlPath">XML文件相對路徑</param> /// <param name="Columns">要插入行的列名數組，如：string[] Columns = {"name","IsMarried"};</param> /// <param name="ColumnValue">要插入行每列的值數組，如：string[] ColumnValue={"XML大全","false"};</param> /// <returns>成功返回true,否則返回false</returns> public static bool WriteXmlByDataSet(string strXmlPath, string[] Columns, string[] ColumnValue) { try { //根據傳入的XML路徑得到.XSD的路徑，兩個文件放在同一個目錄下 string strXsdPath = strXmlPath.Substring(0, strXmlPath.IndexOf(".")) + ".xsd"; DataSet ds = new DataSet(); ds.ReadXmlSchema(GetXmlFullPath(strXsdPath)); //讀XML架構，關系到列的數據類型 ds.ReadXml(GetXmlFullPath(strXmlPath)); DataTable dt = ds.Tables[0]; DataRow newRow = dt.NewRow(); //在原來的表格基礎上創建新行 for (int i = 0; i < Columns.Length; i++) //循環給一行中的各個列賦值 { 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 修改數據 /// <summary> /// 修改指定節點的數據 /// </summary> /// <param name="node">節點</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> /// 修改指定節點的數據 /// </summary> /// <param name="path">路徑</param> /// <param name="node">節點</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> /// 修改指定節點的屬性值(靜態) /// </summary> /// <param name="path">路徑</param> /// <param name="node">節點</param> /// <param name="attribute">屬性名，非空時修改該節點屬性值，否則修改節點值</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> /// 更改符合條件的一條記錄 /// </summary> /// <param name="strXmlPath">XML文件路徑</param> /// <param name="Columns">列名數組</param> /// <param name="ColumnValue">列值數組</param> /// <param name="strWhereColumnName">條件列名</param> /// <param name="strWhereColumnValue">條件列值</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));//讀XML架構，關系到列的數據類型 ds.ReadXml(GetXmlFullPath(strXmlPath)); //先判斷行數 if (ds.Tables[0].Rows.Count > 0) { for (int i = 0; i < ds.Tables[0].Rows.Count; i++) { //如果當前記錄為符合Where條件的記錄 if (ds.Tables[0].Rows[i][strWhereColumnName].ToString().Trim().Equals(strWhereColumnValue)) { //循環給找到行的各列賦新值 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));//重新寫入XML文件 return true; } } } return false; } catch (Exception) { return false; } } #endregion #region 刪除數據 /// <summary> /// 刪除節點值 /// </summary> /// <param name="path">路徑</param> /// <param name="node">節點</param> /// <param name="attribute">屬性名，非空時刪除該節點屬性值，否則刪除節點值</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> /// 刪除數據 /// </summary> /// <param name="path">路徑</param> /// <param name="node">節點</param> /// <param name="attribute">屬性名，非空時刪除該節點屬性值，否則刪除節點值</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> /// 刪除所有行 /// </summary> /// <param name="strXmlPath">XML路徑</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> /// 通過刪除DataSet中指定索引行，重寫XML以實現刪除指定行 /// </summary> /// <param name="iDeleteRow">要刪除的行在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> /// 刪除指定列中指定值的行 /// </summary> /// <param name="strXmlPath">XML相對路徑</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) { //判斷行多還是刪除的值多，多的for循環放在里面 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 }}希望本文所述對大家的C#程序設計有所幫助。
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