4.修改XML文档中的数据：
/// <summary>
/// 修改数据
/// </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>
/// <returns></returns>
public static void Update(string path, string node, string attribute, string value)
{
try
{
var doc = new XmlDocument();
doc.Load(path);
var xn = doc.SelectSingleNode(node);
var xe = (XmlElement)xn;
if (attribute.Equals(""))
{
if (xe != null) xe.InnerText = value;
}
else
{
xe?.SetAttribute(attribute, value);
}
doc.Save(path);
}
catch (Exception er)
{
throw new Exception(er.ToString());
}
}
5.删除XML文档中数据：
/// <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>
/// <returns></returns>
public static void Delete(string path, string node, string attribute)
{
try
{
var doc = new XmlDocument();
doc.Load(path);
var xn = doc.SelectSingleNode(node);
var xe = (XmlElement)xn;
if (attribute.Equals(""))
{
xn?.ParentNode?.RemoveChild(xn);
}
else
{
xe?.RemoveAttribute(attribute);
}
doc.Save(path);
}
catch (Exception er)
{
throw new Exception(er.ToString());
}
}
6.读取XML文档中指定节点数据：
/// <summary>
/// 获得xml文件中指定节点的节点数据
/// </summary>
/// <param name="path"></param>
/// <param name="nodeName"></param>
/// <returns></returns>
public static string GetNodeInfoByNodeName(string path, string nodeName)
{
var xmlString = string.Empty;
try
{
var xml = new XmlDocument();
xml.Load(path);
var root = xml.DocumentElement;
if (root == null) return xmlString;
var node = root.SelectSingleNode("//" + nodeName);
if (node != null)
{
xmlString = node.InnerText;
}
}
catch (Exception er)
{
throw new Exception(er.ToString());
}
return xmlString;
}
7.获取XML指定节点的属性：
/// <summary>
/// 功能:读取指定节点的指定属性值
/// </summary>
/// <param name="path"></param>
/// <param name="strNode">节点名称</param>
/// <param name="strAttribute">此节点的属性</param>
/// <returns></returns>
public string GetXmlNodeAttributeValue(string path, string strNode, string strAttribute)
{
var strReturn = "";
try
{
var xml = new XmlDocument();
xml.Load(path);
//根据指定路径获取节点
var xmlNode = xml.SelectSingleNode(strNode);
if (xmlNode != null)
{
//获取节点的属性，并循环取出需要的属性值
var xmlAttr = xmlNode.Attributes;
if (xmlAttr == null) return strReturn;
for (var i = 0; i < xmlAttr.Count; i++)
{
if (xmlAttr.Item(i).Name != strAttribute) continue;
strReturn = xmlAttr.Item(i).Value;
break;
}
}
}
catch (XmlException xmle)
{
throw new Exception(xmle.Message);
}
return strReturn;
}
