.net 读取文件数据

//新建一个data.txt    内容如下

169.868592016381,-73.2891742320069
169.388181055691,-73.5364222712322
169.750305089806,-73.6008442380541
169.918029151954,-73.5541793331424
169.868592016381,-73.2891742320069
END
166.631652045891,-77.1728092143666
166.372218060531,-77.2768852946332
166.61984412359,-77.3842371903049
166.217103062991,-77.5354373361399
166.858577993192,-77.6655682271997
166.557771101318,-77.7088312528823
166.873689055903,-77.7293783150887
166.776642039652,-77.8577902454421
167.583618151274,-77.6366872062885
168.940557082799,-77.6402872337091
169.423001996118,-77.4629782976242
167.379696002005,-77.3836162589165
166.631652045891,-77.1728092143666
END

//创建一个类，用来分析与处理文本文件内的数据。
public class XY
{
    public double X;
    public double Y;

    public XY(double x,double y)
    {
        this.X = x;
        this.Y = y;
    }
    public static bool TryParse(string line,out XY xy)
    {
        xy = null;
        if (string.IsNullOrEmpty(line)) return false;
        string[] array = line.Trim().Split(',');
        if (array.Length != 2) return false;

        double a;
        if (!double.TryParse(array[0].ToString(), out a)) return false;
        double b;
        if (!double.TryParse(array[1].ToString(), out b)) return false;
        xy = new XY(a, b);
        return true;
    }
    public override string ToString()
    {
        return string.Format("{0}{1}",X,Y);
    }
}

//在程序中，应用上面写好的类XY:
public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string txt = Server.MapPath("~/data.txt");
        var txtLines = System.IO.File.ReadAllLines(txt);

        var o = new List<XY>();
        foreach (string line in txtLines)
        {
            XY xy;
            if (XY.TryParse(line,out xy))
            {
                o.Add(xy);
            }
        }
        o.ForEach(delegate(XY xy)
        {
            Response.Write(xy.ToString() + "<br/>");
        });
    }
}

//数据全部收集于List<XY>泛型集合中。但在上图中，Insus.NET有输出至网页上。

//创建实例，读取XML

 XmlDocument xmldoc = new XmlDocument();

 string path = HttpContext.Current.Server.MapPath("../XMLFile/ChatInfor.xml");

 xmldoc.Load(path);

 //查找根节点

   XmlNode chat = xmldoc.SelectSingleNode("Chat");

 //创建节点

   XmlElement infor = xmldoc.CreateElement("infor");

 //设置属性

   infor.SetAttribute("id", mid);

 

 XmlElement xuser = xmldoc.CreateElement("userid");

 //插入文本

   xuser.InnerText = uid;

 infor.AppendChild(xuser);

 

 XmlElement xdate = xmldoc.CreateElement("date");

 xdate.InnerText = date;

 infor.AppendChild(xdate);

 

 XmlElement xmess = xmldoc.CreateElement("content");

 xmess.InnerText = mess;

 infor.AppendChild(xmess);

 

 //存入根节点，保存文件

   chat.AppendChild(infor);

 xmldoc.Save(path);