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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Net;

namespace WindowsFormsApplication5
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            this.CenterToScreen();
        }

        private void button1_Click(object sender, EventArgs e)
        {

          
            string http;
            if (textBox1.Text.Substring(0, 7) != "http://")
            {
                http = "http://" + textBox1.Text;
            }
            else
            {
                http = textBox1.Text;
            }
            WebClient heku = new WebClient();
            Stream k = heku.OpenRead(http);
            StreamReader j = new StreamReader(k,Encoding.GetEncoding("gb2312"));
            string ok;
            ok = "";
            string y;
            while ((y=j.ReadLine()) != null)
            {
                ok=ok+y;
            }
            textBox2.Text = ok;
            string u;
            u = "百度一下,你就知道";
       
            MessageBox.Show(ok.Substring(ok.IndexOf(u),u.Length), "提示");

               
            j.Close();
        }
    }
}

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在对txt文件读的操作中貌似没问题。因为代码能实现文件的读操作,但是所读txt文件包含中文的时候就以乱码显示。查了半天资料,看似复杂的问题其实很简单就能解决,稍微改动一下即可:StreamReader sr = new StreamReader(fileName,Encoding.GetEncoding("gb2312"));

对C#读写文件网上的帖子泛滥成灾,百度一下就能轻松找到用C#对文件读写、打开、追加、打开、删除、移动、创建目录等操作。和Java一样,C#提供的类库能够轻松实现对文件的操作。

//C#写入/读出文本文件

string fileName =@"c:\111.txt";
   StreamReader sr = new StreamReader(fileName);                                               string   str=sr.ReadLine   ();                                                                                                                                    sr.close();                                       

   StreamWriterrw=File.CreateText(Server.MapPath(".")+"\\myText.txt");
rw.WriteLine("写入");
rw.WriteLine("abc");
rw.WriteLine(".NET笔记");
rw.Flush();
rw.Close();

//打开文本文件
StreamReadersr=File.OpenText(Server.MapPath(".")+"\\myText.txt");
StringBuilderoutput=newStringBuilder();
stringrl;
while((rl=sr.ReadLine())!=null)
{
   output.Append(rl+"");
}

lblFile.Text=output.ToString();
sr.Close();

 

//C#追加文件
StreamWritersw=File.AppendText(Server.MapPath(".")+"\\myText.txt");
sw.WriteLine("追逐理想");
sw.WriteLine("kzlll");
sw.WriteLine(".NET笔记");
sw.Flush();
sw.Close();

//C#拷贝文件
stringOrignFile,NewFile;
OrignFile=Server.MapPath(".")+"\\myText.txt";
NewFile=Server.MapPath(".")+"\\myTextCopy.txt";
File.Copy(OrignFile,NewFile,true);

//C#删除文件
stringdelFile=Server.MapPath(".")+"\\myTextCopy.txt";
File.Delete(delFile);

//C#移动文件
stringOrignFile,NewFile;
OrignFile=Server.MapPath(".")+"\\myText.txt";
NewFile=Server.MapPath(".")+"\\myTextCopy.txt";
File.Move(OrignFile,NewFile);

//C#创建目录
//创建目录c:\sixAge
DirectoryInfod=Directory.CreateDirectory("c:\\sixAge");
//d1指向c:\sixAge\sixAge1
DirectoryInfod1=d.CreateSubdirectory("sixAge1");
//d2指向c:\sixAge\sixAge1\sixAge1_1
DirectoryInfod2=d1.CreateSubdirectory("sixAge1_1");
//将当前目录设为c:\sixAge
Directory.SetCurrentDirectory("c:\\sixAge");
//创建目录c:\sixAge\sixAge2
Directory.CreateDirectory("sixAge2");
//创建目录c:\sixAge\sixAge2\sixAge2_1
Directory.CreateDirectory("sixAge2\\sixAge2_1");

但是,在对txt文件读的操作中貌似没问题。因为代码能实现文件的读操作,但是所读txt文件包含中文的时候就以乱码显示。查了半天资料,看似复杂的问题其实很简单就能解决,稍微改动一下即可:StreamReader sr = new StreamReader(fileName,Encoding.GetEncoding("gb2312"));

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