Asp.net读取和写入txt文件方法（实例）！

Asp.net读取和写入txt文件方法（实例）！

====================================================== 【程序第一行的引入命名空间文件 - 参考】

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.IO;

 string strfile;
        strfile = "asp.txt";
        
        string strout;
        strout = "";
        if (!File.Exists(System.Web.HttpContext.Current.Server.MapPath(strfile)))
        {
        }
        else
        {
            StreamReader sr = new StreamReader(System.Web.HttpContext.Current.Server.MapPath(strfile), System.Text.Encoding.Default);
            String input = sr.ReadToEnd();
            sr.Close();
            strout = input;
        }

        Response.Write("ssss");

====================================================== 【写入 - 参考】

System.IO.File.WriteAllText("e:\\asp_1.txt", "I LOVE YOU!wang na");  // 一定要绝对路径