XML文件读取工具类
2024-10-15 09:49:38
/// <summary>
/// Author: jiangxiaoqiang
/// </summary>
public class XmlReader
{
//========================================================= // #region 获取XmlDocument对象 /// <summary>
/// 根据XML文件内容获取XmlDocument对象
/// </summary>
/// <param name="xmlFileContent"></param>
/// <returns></returns>
public static XmlDocument GetXmlDocByXmlContent(string xmlFileContent)
{
if (string.IsNullOrEmpty(xmlFileContent))
{
return null;
} var xDoc = new XmlDocument();
try
{
xDoc.LoadXml(xmlFileContent);
}
catch
{
xDoc = null;
} return xDoc;
} /// <summary>
/// 根据XML文件路径获取XmlDocument对象
/// </summary>
/// <param name="xmlFilePath"></param>
/// <returns></returns>
public static XmlDocument GetXmlDocByFilePath(string xmlFilePath)
{
if (string.IsNullOrEmpty(xmlFilePath) || !File.Exists(xmlFilePath))
{
return null;
} var xDoc = new XmlDocument();
try
{
xDoc.Load(xmlFilePath);
}
catch
{
throw new Exception(string.Format("请确认该XML文件格式正确，路径为：{0}", xmlFilePath));
} return xDoc;
} #endregion //========================================================= // //========================================================= // #region 获取XML节点（或节点列表） /// <summary>
/// 获取父节点下指定节点名称的第一个子节点
/// </summary>
/// <param name="parentXmlNode"></param>
/// <param name="childNodeName"></param>
/// <returns></returns>
public static XmlNode GetFirstChildNodeByName(XmlNode parentXmlNode, string childNodeName)
{
var childXmlNodes = GetChildNodesByName(parentXmlNode, childNodeName);
if (childXmlNodes != null && childXmlNodes.Count > )
{
return childXmlNodes[];
} return null;
} /// <summary>
/// 获取父节点下指定节点名称的子节点列表
/// </summary>
/// <param name="parentXmlNode">父节点</param>
/// <param name="nodeName">节点名称</param>
/// <returns></returns>
public static XmlNodeList GetChildNodesByName(XmlNode parentXmlNode, string nodeName)
{
if (parentXmlNode == null || string.IsNullOrEmpty(nodeName))
{
return null;
} return GetChildNodesByXPathExpr(parentXmlNode, string.Format(".//{0}", nodeName));
} /// <summary>
/// 获取父节点下满足xpathExpr表达式的XML子节点列表
/// </summary>
/// <param name="parentXmlNode">父节点</param>
/// <param name="xpathExpr"></param>
/// <returns></returns>
public static XmlNodeList GetChildNodesByXPathExpr(XmlNode parentXmlNode, string xpathExpr)
{
if (parentXmlNode == null || string.IsNullOrEmpty(xpathExpr))
{
return null;
} return parentXmlNode.SelectNodes(xpathExpr);
} /// <summary>
/// 获取父节点下的第一个子节点
/// </summary>
/// <param name="parentXmlNode"></param>
/// <returns></returns>
public static XmlNode GetFirstChildNode(XmlNode parentXmlNode)
{
var childXmlNodes = GetChildNodes(parentXmlNode);
if (childXmlNodes != null && childXmlNodes.Count > )
{
return childXmlNodes[];
} return null;
} /// <summary>
/// 获取父节点的子节点列表
/// </summary>
/// <param name="parentXmlNode">父节点</param>
/// <returns></returns>
public static XmlNodeList GetChildNodes(XmlNode parentXmlNode)
{
return parentXmlNode == null ? null : parentXmlNode.ChildNodes;
} #endregion
//========================================================= // //========================================================= // #region 读取节点属性值 /// <summary>
/// 读取某个XML节点的属性值（根据属性名）
/// </summary>
/// <param name="xmlNode"></param>
/// <param name="attrName"></param>
/// <returns></returns>
public static string ReadAttrValue(XmlNode xmlNode, string attrName)
{
var xmlElement = xmlNode as XmlElement; return xmlElement == null ? null : xmlElement.GetAttribute(attrName);
} /// <summary>
/// 读取父节点下指定节点名和属性名的第一个子节点的属性值
/// </summary>
/// <param name="parentXmlNode">XML父节点</param>
/// <param name="childNodeName">节点名称</param>
/// <param name="attrName">属性名</param>
/// <returns></returns>
public static string ReadFirstAttrValue(XmlNode parentXmlNode, string childNodeName, string attrName)
{
var attrVals = ReadAttrValues(parentXmlNode, childNodeName, attrName);
return (attrVals == null || attrVals.Length == ) ? null : attrVals[];
} /// <summary>
/// 读取父节点下指定节点名和属性名的所有子节点的该属性值的数组
/// </summary>
/// <param name="parentXmlNode">XML文档</param>
/// <param name="childNodeName">节点名称</param>
/// <param name="attrName">属性名</param>
/// <returns></returns>
public static string[] ReadAttrValues(XmlNode parentXmlNode, string childNodeName, string attrName)
{
if (parentXmlNode == null || string.IsNullOrEmpty(childNodeName) || string.IsNullOrEmpty(attrName))
{
return null;
} var xpathExpr = string.Format("//{0}[@{1}]", childNodeName, attrName);
var nodes = GetChildNodesByXPathExpr(parentXmlNode, xpathExpr);
if (nodes != null && nodes.Count > )
{
var nodeCount = nodes.Count;
var attrVals = new string[nodeCount];
for (var i = ; i < nodeCount; i++)
{
attrVals[i] = ((XmlElement)nodes[i]).GetAttribute(attrName);
} return attrVals;
} return null;
} #endregion //========================================================= // //========================================================= // #region 读取父节点下的子节点的文本内容 /// <summary>
/// 读取父节点下指定节点名的第一个子节点的文本
/// </summary>
/// <param name="parentXmlNode"></param>
/// <param name="childNodeName"></param>
/// <returns></returns>
public static string ReadFirstChildNodeTextByName(XmlNode parentXmlNode, string childNodeName)
{
var childNodeTexts = ReadChildNodeTextsByName(parentXmlNode, childNodeName);
if (childNodeTexts != null && childNodeTexts.Length > )
{
return childNodeTexts[];
} return null;
} /// <summary>
/// 读取父节点下指定节点名的所有子节点的文本数组
/// </summary>
/// <param name="parentXmlNode"></param>
/// <param name="childNodeName"></param>
/// <returns></returns>
public static string[] ReadChildNodeTextsByName(XmlNode parentXmlNode, string childNodeName)
{
if (parentXmlNode == null || string.IsNullOrEmpty(childNodeName))
{
return null;
} var xpathExpr = string.Format(".//{0}", childNodeName);
var childNodes = GetChildNodesByXPathExpr(parentXmlNode, xpathExpr);
if (childNodes != null && childNodes.Count > )
{
var nodeCount = childNodes.Count;
var nodeTexts = new string[nodeCount];
for (var i = ; i < nodeCount; i++)
{
nodeTexts[i] = childNodes[i].InnerText;
} return nodeTexts;
} return null;
} /// <summary>
/// 读取父节点下的第一个子节点的文本
/// </summary>
/// <param name="parentXmlNode"></param>
/// <returns></returns>
public static string ReadFirstChildNodeText(XmlNode parentXmlNode)
{
var childNodeTexts = ReadChildNodeTexts(parentXmlNode);
if (childNodeTexts != null && childNodeTexts.Length > )
{
return childNodeTexts[];
} return null;
} /// <summary>
/// 读取父节点下的所有子节点的文本数组
/// </summary>
/// <param name="parentXmlNode"></param>
/// <returns></returns>
public static string[] ReadChildNodeTexts(XmlNode parentXmlNode)
{
if (parentXmlNode == null)
{
return null;
} var childNodes = GetChildNodes(parentXmlNode);
if (childNodes != null && childNodes.Count > )
{
var nodeCount = childNodes.Count;
var nodeTexts = new string[nodeCount];
for (var i = ; i < nodeCount; i++)
{
nodeTexts[i] = childNodes[i].InnerText;
} return nodeTexts;
} return null;
} /// <summary>
/// 读取XML节点文本
/// </summary>
/// <param name="xmlNode"></param>
/// <returns></returns>
public static string ReadNodeText(XmlNode xmlNode)
{
if (xmlNode == null)
{
return null;
} return xmlNode.InnerText;
} #endregion //========================================================= //
}
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