c# XML读取

System.Xml 命名空间

https://msdn.microsoft.com/zh-cn/library/gg145036(v=vs.110).aspx

一、读取

1.通过 XmlDocument获取稳定内容

2.通过XmlNodeList 找到节点数据

private void List_Click(object sender, RoutedEventArgs e)
        { 
            string xmlStr = getData();

            StringBuilder rtn = new StringBuilder();
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.LoadXml(xmlStr);
            XmlNodeList xmlNodeList = xmlDoc.GetElementsByTagName("root");
            foreach (XmlNode xmlNode in xmlNodeList)
            {
                //家长节点
                XmlNodeList childXmlNodes1 = xmlNode.ChildNodes;
                foreach (XmlNode childXmlNode1 in childXmlNodes1)
                {
                    if (childXmlNode1.Name == "resultInfo")
                    {
                        //成员列表
                        XmlNodeList childXmlNodes2 = childXmlNode1.ChildNodes; 
                        
                        foreach (XmlNode childXmlNode2 in childXmlNodes2)
                        {
                            if (childXmlNode2.Name == "NAME")
                            { 
                                rtn.Append(childXmlNode2.InnerText);
                            } 
                        }
                    } 
                }
            }



        }

private string getData()
        {
            return "<?xml version="1.0" encoding="utf-8"?>" + @"
<root>
 <resultInfo>
   <NAME>姓名</NAME>
   <SEX>性别</SEX> 
   <error_msg> 成功！或者error:xxx </error_msg>
   <remark>备注</remark>
 </resultInfo>
</root>
";
        }

读取方法扩充

public static LoginResponse GetLoginResponse(string xmlStr)
{
    LoginResponse response = new LoginResponse();

    XmlDocument xmlDoc = new XmlDocument();
    xmlDoc.LoadXml(xmlStr);
    
    XmlNode errorNode = xmlDoc.SelectSingleNode("//Error");
     if (errorNode != null)
     {
         response.ResultErrorCode = (errorNode.SelectSingleNode("ErrorCode")).InnerText;
         response.ResultErrorText = (errorNode.SelectSingleNode("ErrorText")).InnerText;
         response.ResultErrorDescription = (errorNode.SelectSingleNode("ErrorDescription")).InnerText;
     } 
    
    return response;
}

数据：
<?xml version="1.0" encoding="UTF-8"?>
<RESULT>
<Error>
<ErrorCode>-1</ErrorCode>
<ErrorText>ErrorText</ErrorText>
<ErrorDescription>ErrorDescription</ErrorDescription>
</Error></RESULT>

二、设置

三、常见问题

 1.XmlDocument加载xml文件时，有中文可能会报错，提示配置错误？

因为编码问题造成的，解决方法：

修改XML头部为：<?xml version='1.0' encoding="GB2312"?>