8.设置XML文档中指定节点的属性：
/// <summary>
/// 功能:设置节点的属性值
/// </summary>
/// <param name="path"></param>
/// <param name="xmlNodePath">节点名称</param>
/// <param name="xmlNodeAttribute">属性名称</param>
/// <param name="xmlNodeAttributeValue">属性值</param>
public void SetXmlNodeAttributeValue(string path, string xmlNodePath, string xmlNodeAttribute, string xmlNodeAttributeValue)
{
try
{
var xml = new XmlDocument();
xml.Load(path);
//可以批量为符合条件的节点的属性付值
var xmlNode = xml.SelectNodes(xmlNodePath);
if (xmlNode == null) return;
foreach (var xmlAttr in from XmlNode xn in xmlNode select xn.Attributes)
{
if (xmlAttr == null) return;
for (var i = 0; i < xmlAttr.Count; i++)
{
if (xmlAttr.Item(i).Name != xmlNodeAttribute) continue;
xmlAttr.Item(i).Value = xmlNodeAttributeValue;
break;
}
}
}
catch (XmlException xmle)
{
throw new Exception(xmle.Message);
}
}
9.读取XML文档指定节点的值：
/// <summary>
/// 读取XML资源中的指定节点内容
/// </summary>
/// <param name="source">XML资源</param>
/// <param name="xmlType">XML资源类型：文件，字符串</param>
/// <param name="nodeName">节点名称</param>
/// <returns>节点内容</returns>
public static object GetNodeValue(string source, XmlType xmlType, string nodeName)
{
var xd = new XmlDocument();
if (xmlType == XmlType.File)
{
xd.Load(source);
}
else
{
xd.LoadXml(source);
}
var xe = xd.DocumentElement;
XmlNode xn = null;
if (xe != null)
{
xn= xe.SelectSingleNode("//" + nodeName);
}
return xn.InnerText;
}
10.更新XML文档指定节点的内容：
/// <summary>
/// 更新XML文件中的指定节点内容
/// </summary>
/// <param name="filePath">文件路径</param>
/// <param name="nodeName">节点名称</param>
/// <param name="nodeValue">更新内容</param>
/// <returns>更新是否成功</returns>
public static bool UpdateNode(string filePath, string nodeName, string nodeValue)
{
try
{
bool flag;
var xd = new XmlDocument();
xd.Load(filePath);
var xe = xd.DocumentElement;
if (xe == null) return false;
var xn = xe.SelectSingleNode("//" + nodeName);
if (xn != null)
{
xn.InnerText = nodeValue;
flag = true;
}
else
{
flag = false;
}
return flag;
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
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11.将对象转化为XML文件，并存入指定目录：
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/// <summary>
/// 将对象转化为xml，并写入指定路径的xml文件中
/// </summary>
/// <typeparam name="T">C#对象名</typeparam>
/// <param name="item">对象实例</param>
/// <param name="path">路径</param>
/// <param name="jjdbh">标号</param>
/// <param name="ends">结束符号（整个xml的路径类似如下：C:xmltest201111send.xml，其中path=C:xmltest,jjdbh=201111,ends=send）</param>
/// <returns></returns>
public static string WriteXml<T>(T item, string path, string jjdbh, string ends)
{
if (string.IsNullOrEmpty(ends))
{
//默认为发送
ends = "send";
}
//控制写入文件的次数
var i = 0;
//获取当前对象的类型，也可以使用反射typeof(对象名)
var serializer = new XmlSerializer(item.GetType());
//xml的路径组合
object[] obj = { path, "", jjdbh, ends, ".xml" };
var xmlPath = string.Concat(obj);
while (true)
{
try
{
//用filestream方式创建文件不会出现“文件正在占用中，用File.create”则不行
var fs = System.IO.File.Create(xmlPath);
fs.Close();
TextWriter writer = new StreamWriter(xmlPath, false, Encoding.UTF8);
var xml = new XmlSerializerNamespaces();
xml.Add(string.Empty, string.Empty);
serializer.Serialize(writer, item, xml);
writer.Flush();
writer.Close();
break;
}
catch (Exception)
{
if (i < 5)
{
i++;
continue;
}
break;
}
}
return SerializeToXmlStr<T>(item, true);
}
