C#教程之C# XML创建解析、XML格式化

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C#教程之C# XML创建解析、XML格式化

导入命名空间：

VS需要在项目中添加引用system.XML; 代码中添加 using System.XML和using System.IO;

XML范例：

<?xml version="1.0" encoding="UTF-8"?>

<MSG>

  <HEADINFO>

    <TYPE>ValidFlight</TYPE>

  </HEADINFO>

  <ValidFlight>

    <Flight>

      <Runway>3</Runway>

      <Stand>27</Stand>

      <FlightID>436179</FlightID>

    </Flight>

    <Flight>

      <Runway>3</Runway>

      <FlightID>436180</FlightID>

    </Flight>

</ValidFlight>

</MSG>

XML解析：

方法一：

XmlNode rootNode = XDoc.SelectSingleNode("/MSG/ValidFlight");

foreach (XmlNode Xnode in rootNode.ChildNodes)
{
        int FlightId = Convert.ToInt32(Xnode.SelectSingleNode("FlightID").InnerText);

        string RunWay = Xnode.SelectSingleNode("Runway") == null ? null : Xnode.SelectSingleNode("Runway").InnerText;

       string Stand = Xnode.SelectSingleNode("Stand") == null ? null : Xnode.SelectSingleNode("Stand").InnerText;
}

方法二：

XmlNode nodelist= XDoc.SelectSingleNode("MSG/ValidFlight");

foreach (XmlNode Xnode in nodelist)
{
     int FlightId = Convert.ToInt32(Xnode["FlightID"].InnerText);

    string RunWay = Xnode["Runway"]== null ? null : Xnode.Xnode["Runway"].InnerText;

    string Stand = Xnode["Stand"] == null ? null :Xnode["Stand"].InnerText;
}

XML创建

XmlDocument xmlDoc = new XmlDocument();

//创建根节点

xmlDoc.LoadXml("<?xml version = '1.0' encoding='UTF-8'?><MSG></MSG>");

XmlElement root = xmlDoc.DocumentElement; 

//创建一级节点

XmlElement flight = xmlDoc.CreateElement("flight");

//创建第二级节点

XmlElement flightPlan = xmlDoc.CreateElement("flightPlan");

XmlElement fpid = xmlDoc.CreateElement("fpid");

fpid.InnerText = 32;

flightPlan.AppendChild(fpid);

//创建第二个节点

XmlElement fpflag = xmlDoc.CreateElement("fpflag");
fpflag.InnerText = 1;

fpflag.SetAttribute("name","fpflag");

flightPlan.AppendChild(fpflag);

flight.AppendChild(flightPlan);

root.AppendChild(flight);

XML格式化

private static string formatXml(XmlDocument xml)
{
XmlDocument xd = xml as XmlDocument;
StringBuilder sb = new StringBuilder();
StringWriter sw = new StringWriter(sb);
XmlTextWriter xtw = null;
try
{
xtw = new XmlTextWriter(sw);
xtw.Formatting = Formatting.Indented;
xtw.Indentation = 1;
xtw.IndentChar = '\t';
xd.WriteTo(xtw);
}
finally
{
if (xtw == null)
xtw.Close();
}
return sb.ToString();
}

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