using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Xml;
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using CY.Infrastructure.Common;
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using System.Data;
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using System.Text.RegularExpressions;
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namespace CY.Infrastructure.XML
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{
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/// <summary>
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/// XmlDocument扩展类
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///
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/// 目的:用于优化和减少代码书写量
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/// 备注:Element 译为:元素
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/// Document 译为:文档
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/// Node 译为:节点
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/// </summary>
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public class XmlDocumentExtender : XmlDocument
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{
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public XmlDocumentExtender()
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: base()
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{
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}
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#region 扩展的构造函数
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public XmlDocumentExtender(XmlNameTable nt)
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: base(new XmlImplementation(nt))
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{
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}
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#endregion
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/// <summary>
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/// 加载的文件名(含路径)
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/// </summary>
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/// <param name="filename"></param>
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public override void Load(string filename)
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{
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if (Utils.FileExists(filename))
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{
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base.Load(filename);
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}
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else
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{
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throw new Exception("文件: " + filename + " 不存在!");
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}
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}
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/// <summary>
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/// 在指定的Xml元素下,添加子Xml元素
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/// </summary>
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/// <param name="xmlElement">被追加子元素的Xml元素</param>
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/// <param name="childElementName">要添加的Xml元素名称</param>
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/// <param name="childElementValue">要添加的Xml元素值</param>
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/// <returns></returns>
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public bool AppendChildElementByNameValue(ref XmlElement xmlElement, string childElementName, object childElementValue)
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{
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return AppendChildElementByNameValue(ref xmlElement, childElementName, childElementValue, false);
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}
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/// <summary>
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/// 在指定的Xml元素下,添加子Xml元素
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/// </summary>
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/// <param name="xmlElement">被追加子元素的Xml元素</param>
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/// <param name="childElementName">要添加的Xml元素名称</param>
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/// <param name="childElementValue">要添加的Xml元素值</param>
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/// <param name="IsCDataSection">是否是CDataSection类型的子元素</param>
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/// <returns></returns>
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public bool AppendChildElementByNameValue(ref XmlElement xmlElement, string childElementName, object childElementValue, bool IsCDataSection)
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{
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if ((xmlElement != null) && (xmlElement.OwnerDocument != null))
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{
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//是否是CData类型Xml元素
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if (IsCDataSection)
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{
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XmlCDataSection tempdata = xmlElement.OwnerDocument.CreateCDataSection(childElementName);
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tempdata.InnerText = FiltrateControlCharacter(childElementValue.ToString());
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XmlElement childXmlElement = xmlElement.OwnerDocument.CreateElement(childElementName);
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childXmlElement.AppendChild(tempdata);
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xmlElement.AppendChild(childXmlElement);
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}
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else
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{
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XmlElement childXmlElement = xmlElement.OwnerDocument.CreateElement(childElementName);
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childXmlElement.InnerText = FiltrateControlCharacter(childElementValue.ToString());
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xmlElement.AppendChild(childXmlElement);
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}
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return true;
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}
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else
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{
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return false;
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}
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}
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/// <summary>
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/// 在指定的Xml结点下,添加子Xml元素
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/// </summary>
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/// <param name="xmlNode">被追加子元素的Xml节点</param>
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/// <param name="childElementName">要添加的Xml元素名称</param>
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/// <param name="childElementValue">要添加的Xml元素值</param>
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/// <returns></returns>
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public bool AppendChildElementByNameValue(ref XmlNode xmlNode, string childElementName, object childElementValue)
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{
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return AppendChildElementByNameValue(ref xmlNode, childElementName, childElementValue, false);
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}
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/// <summary>
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/// 在指定的Xml结点下,添加子Xml元素
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/// </summary>
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/// <param name="xmlNode">被追加子元素的Xml节点</param>
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/// <param name="childElementName">要添加的Xml元素名称</param>
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/// <param name="childElementValue">要添加的Xml元素值</param>
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/// <param name="IsCDataSection">是否是CDataSection类型的子元素</param>
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/// <returns></returns>
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public bool AppendChildElementByNameValue(ref XmlNode xmlNode, string childElementName, object childElementValue, bool IsCDataSection)
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{
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if ((xmlNode != null) && (xmlNode.OwnerDocument != null))
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{
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//是否是CData类型Xml结点
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if (IsCDataSection)
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{
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XmlCDataSection tempdata = xmlNode.OwnerDocument.CreateCDataSection(childElementName);
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tempdata.InnerText = FiltrateControlCharacter(childElementValue.ToString());
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XmlElement childXmlElement = xmlNode.OwnerDocument.CreateElement(childElementName);
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childXmlElement.AppendChild(tempdata);
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xmlNode.AppendChild(childXmlElement);
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}
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else
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{
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XmlElement childXmlElement = xmlNode.OwnerDocument.CreateElement(childElementName);
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childXmlElement.InnerText = FiltrateControlCharacter(childElementValue.ToString());
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xmlNode.AppendChild(childXmlElement);
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}
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return true;
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}
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else
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{
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return false;
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}
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}
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/// <summary>
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/// 通过数据行向当前XML元素下追加子元素
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/// </summary>
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/// <param name="xmlElement">被追加子元素的Xml元素</param>
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/// <param name="dcc">当前数据表中的列集合</param>
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/// <param name="dr">当前行数据</param>
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/// <returns></returns>
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public bool AppendChildElementByDataRow(ref XmlElement xmlElement, DataColumnCollection dcc, DataRow dr)
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{
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return AppendChildElementByDataRow(ref xmlElement, dcc, dr, null);
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}
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/// <summary>
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/// 通过数据行向当前XML元素下追加子元素
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/// </summary>
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/// <param name="xmlElement">被追加子元素的Xml元素</param>
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/// <param name="dcc">当前数据表中的列集合</param>
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/// <param name="dr">当前行数据</param>
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/// <param name="removecols">不会被追加的列名</param>
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/// <returns></returns>
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public bool AppendChildElementByDataRow(ref XmlElement xmlElement, DataColumnCollection dcc, DataRow dr, string removecols)
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{
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if ((xmlElement != null) && (xmlElement.OwnerDocument != null))
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{
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foreach (DataColumn dc in dcc)
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{
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if ((removecols == null) ||
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(removecols == "") ||
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(("," + removecols + ",").ToLower().IndexOf("," + dc.Caption.ToLower() + ",") < 0))
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{
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XmlElement tempElement = xmlElement.OwnerDocument.CreateElement(dc.Caption);
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tempElement.InnerText = FiltrateControlCharacter(dr[dc.Caption].ToString().Trim());
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xmlElement.AppendChild(tempElement);
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}
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}
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return true;
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}
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else
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{
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return false;
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}
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}
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/// <summary>
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/// 实始化节点, 当节点存在则清除当前路径下的所有子结点, 如不存在则直接创建该结点
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/// </summary>
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/// <param name="xmlpath"></param>
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/// <returns></returns>
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public XmlNode InitializeNode(string xmlpath)
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{
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XmlNode xmlNode = this.SelectSingleNode(xmlpath);
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if (xmlNode != null)
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{
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xmlNode.RemoveAll();
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}
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else
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{
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xmlNode = CreateNode(xmlpath);
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}
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return xmlNode;
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}
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/// <summary>
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/// 删除指定路径下面的所有子结点和自身
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/// </summary>
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/// <param name="xmlpath">指定路径</param>
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public void RemoveNodeAndChildNode(string xmlpath)
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{
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XmlNodeList xmlNodeList = this.SelectNodes(xmlpath);
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if (xmlNodeList.Count > 0)
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{
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foreach (XmlNode xn in xmlNodeList)
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{
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xn.RemoveAll();
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xn.ParentNode.RemoveChild(xn);
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}
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}
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}
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/// <summary>
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/// 创建指定路径下的节点
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/// </summary>
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/// <param name="xmlpath">节点路径</param>
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/// <returns></returns>
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public XmlNode CreateNode(string xmlpath)
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{
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string[] xpathArray = xmlpath.Split('/');
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string root = "";
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XmlNode parentNode = this;
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//建立相关节点
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for (int i = 1; i < xpathArray.Length; i++)
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{
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XmlNode node = this.SelectSingleNode(root + "/" + xpathArray[i]);
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// 如果当前路径不存在则建立,否则设置当前路径到它的子路径上
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if (node == null)
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{
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XmlElement newElement = this.CreateElement(xpathArray[i]);
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parentNode.AppendChild(newElement);
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}
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//设置低一级的路径
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root = root + "/" + xpathArray[i];
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parentNode = this.SelectSingleNode(root);
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}
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return parentNode;
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}
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/// <summary>
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/// 得到指定路径的节点值
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/// </summary>
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/// <param name="xmlnode">要查找节点</param>
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/// <param name="path">指定路径</param>
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/// <returns></returns>
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public string GetSingleNodeValue(XmlNode xmlnode, string path)
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{
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if (xmlnode == null)
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{
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return null;
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}
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if (xmlnode.SelectSingleNode(path) != null)
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{
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if (xmlnode.SelectSingleNode(path).LastChild != null)
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{
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return xmlnode.SelectSingleNode(path).LastChild.Value;
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}
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else
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{
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return "";
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}
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}
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return null;
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}
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/// <summary>
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/// 过滤控制字符,包括0x00 - 0x08,0x0b - 0x0c,0x0e - 0x1f
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/// </summary>
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/// <param name="content">要过滤的内容</param>
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/// <returns>过滤后的内容</returns>
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private string FiltrateControlCharacter(string content)
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{
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return Regex.Replace(content, "[\x00-\x08|\x0b-\x0c|\x0e-\x1f]", "");
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}
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}
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}
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