using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Xml; namespace CommonUtil
{
/// <summary>
/// Xml通用操作类
/// </summary>
public class XmlHelper
{
public XmlHelper()
{
} /// <summary>
/// 创建XML文件
/// </summary>
/// <param name="path">路径</param>
/// <param name="filename">xml文件名称（包含后缀名）</param>
/// <param name="rootname">根节点名称</param>
/**************************************************
* 使用示列:
* XmlHelper.CreateXmlFile(path, "text.xml", "root")
************************************************/
public static void CreateXmlFile(string path, string filename, string rootname)
{
try
{
if (path.Equals(""))
throw new Exception("路径不能为空！"); if (filename.Equals(""))
throw new Exception("文件名称不能为空！"); if (!filename.Split('.').GetValue(filename.Split('.').Length - 1).ToString().ToLower().Equals("xml"))
throw new Exception("文件后缀名称必须为xml！"); if (rootname.Equals(""))
throw new Exception("根节点名称不能为空！"); if (!Directory.Exists(path)) //如果路径不存在，则创建路径
Directory.CreateDirectory(path); StringBuilder builder = new StringBuilder();
builder.AppendLine("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
if (!rootname.Equals(""))
{
builder.AppendLine("<" + rootname + ">");
builder.AppendLine("</" + rootname + ">");
} string fullpath = string.Empty;
XmlDocument doc = new XmlDocument();
doc.LoadXml(builder.ToString());
if (path.LastIndexOf('\\') == path.Length - 1)
fullpath = path + filename;
else
fullpath = path + "\\" + filename;
doc.Save(fullpath); //保存xml文件
}
catch
{
throw;
}
} /// <summary>
/// 读取数据
/// </summary>
/// <param name="path">全路径</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>
/// <returns>string</returns>
/**************************************************
* 使用示列:
* XmlHelper.Read(path, "/Node", "")
* XmlHelper.Read(path, "/Node/Element[@Attribute='Value']", "Attribute")
************************************************/
public static string Read(string path, string node, string attribute)
{
string value = "";
try
{
if (!File.Exists(path))
throw new Exception("xml文件不存在！"); if (node.Equals(""))
throw new Exception("节点名称不能为空！"); XmlDocument doc = new XmlDocument();
doc.Load(path);
XmlNode xn = doc.SelectSingleNode(node);
value = (attribute.Equals("") ? xn.InnerText : xn.Attributes[attribute].Value);
}
catch
{
throw;
}
return value;
} /// <summary>
/// 读取数据
/// </summary>
/// <param name="path">全路径</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>
/// <returns></returns>
public static List<string> ReadToList(string path, string node, string attribute)
{
List<string> nodelist = new List<string>(); try
{
if (!File.Exists(path))
throw new Exception("xml文件不存在！"); if (node.Equals(""))
throw new Exception("节点名称不能为空！"); XmlDocument doc = new XmlDocument();
doc.Load(path);
XmlNodeList nodes = doc.SelectNodes(node);
if (nodes != null && nodes.Count > 0)
{
foreach (XmlNode n in nodes)
{
if (attribute.Equals(""))
nodelist.Add(n.InnerText);
else
nodelist.Add(n.Attributes[attribute].Value);
}
}
else
{
nodelist = null;
}
}
catch
{
throw;
} return nodelist;
} /// <summary>
/// 插入数据
/// </summary>
/// <param name="path">全路径</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>
/// <returns></returns>
/**************************************************
* 使用示列:
* XmlHelper.Insert(path, "/Node", "Element", "", "Value")
* XmlHelper.Insert(path, "/Node", "Element", "Attribute", "Value")
* XmlHelper.Insert(path, "/Node", "", "Attribute", "Value")
* XmlHelper.Insert(path, "/Node/Element[@Attribute='Value']", "Element", "Attribute", "Value");
************************************************/
public static void Insert(string path, string node, string element, string attribute, string value)
{
try
{
if (!File.Exists(path))
throw new Exception("xml文件不存在！"); if (node.Equals(""))
throw new Exception("节点名称不能为空！"); if (element.Equals("") && attribute.Equals(""))
throw new Exception("元素名和属性名不能同时为空！"); XmlDocument doc = new XmlDocument();
doc.Load(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(path);
}
catch
{
throw;
}
} /// <summary>
/// 修改数据
/// </summary>
/// <param name="path">全路径</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>
/// <returns></returns>
/**************************************************
* 使用示列:
* XmlHelper.Insert(path, "/Node", "", "Value")
* XmlHelper.Insert(path, "/Node", "Attribute", "Value")
************************************************/
public static void Update(string path, string node, string attribute, string value)
{
try
{
if (!File.Exists(path))
throw new Exception("xml文件不存在！"); if (node.Equals(""))
throw new Exception("节点名称不能为空！"); XmlDocument doc = new XmlDocument();
doc.Load(path);
XmlNode xn = doc.SelectSingleNode(node);
XmlElement xe = (XmlElement)xn;
if (attribute.Equals(""))
xe.InnerText = value;
else
xe.SetAttribute(attribute, value);
doc.Save(path);
}
catch
{
throw;
}
} /// <summary>
/// 删除数据
/// </summary>
/// <param name="path">全路径</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>
/// <returns></returns>
/**************************************************
* 使用示列:
* XmlHelper.Delete(path, "/Node", "")
* XmlHelper.Delete(path, "/Node", "Attribute")
************************************************/
public static void Delete(string path, string node, string attribute)
{
try
{
if (!File.Exists(path))
throw new Exception("xml文件不存在！"); if (node.Equals(""))
throw new Exception("节点名称不能为空！"); XmlDocument doc = new XmlDocument();
doc.Load(path);
XmlNodeList nodes = doc.SelectNodes(node);
if (nodes != null && nodes.Count > 0)
{
foreach (XmlNode xn in nodes)
{
XmlElement xe = (XmlElement)xn;
if (attribute.Equals(""))
xn.ParentNode.RemoveChild(xn);
else
xe.RemoveAttribute(attribute);
}
doc.Save(path);
}
}
catch
{
throw;
}
}
}
}