C++/c#修改hosts文件

c++

#include<iostream>

#include<fstream>

#include <WTypes.h>

#include <Winbase.h>

using namespace std;

int main()

{

ofstream outf;

char * lpFileName="C:\\Windows\\System32\\drivers\\etc\\hosts";

DWORD   dwAttribute   =   ::GetFileAttributes(lpFileName);

if(dwAttribute   &   FILE_ATTRIBUTE_READONLY)

dwAttribute   &=   ~FILE_ATTRIBUTE_READONLY;

SetFileAttributes(lpFileName,dwAttribute);

}

outf.open("C:\\Windows\\System32\\drivers\\etc\\hosts" , ifstream::in);//要覆盖文件，把最后一个参数去掉

outf<<"\n# Copyright (c) 1993-1999 Microsoft Corp.";

outf<<"\n#";

outf<<"\n# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.";

outf<<"\n# This file contains the mappings of IP addresses to host names. Each";

outf<<"\n# entry should be kept on an individual line. The IP address should";

outf<<"\n# be placed in the first column followed by the corresponding host name.";

outf<<"\n# The IP address and the host name should be separated by at least one";

outf<<"\n# space.";

outf<<"\n# Additionally, comments (such as these) may be inserted on individual";

outf<<"\n# lines or following the machine name denoted by a '#' symbol.";

outf<<"\n# For example:";

outf<<"\n# 102.54.94.97 rhino.acme.com # source server";

outf<<"\n# 38.25.63.10 x.acme.com # x client host";

outf<<"\n127.0.0.1 localhost";

outf<<"\n";

outf.close();

return 0;

////追加

#include <STRING>

#include <WTypes.h>

#include <Winbase.h>

    {

    ofstream outf;

    ifstream inf;

    cout<<" 开始设置本地域名，如果杀毒软件弹出窗口，请选择允许/信任\n";

    char * lpFileName="C:\\Windows\\System32\\drivers\\etc\\hosts";

    DWORD   dwAttribute   =   ::GetFileAttributes(lpFileName);

    DWORD   wrAttribute=dwAttribute;

    if(dwAttribute   &   FILE_ATTRIBUTE_READONLY)

        wrAttribute   =   dwAttribute&~FILE_ATTRIBUTE_READONLY;

        SetFileAttributes(lpFileName,wrAttribute);//去掉只读属性

    }

    inf.open(lpFileName,ios::in);

    string line;

    bool haskinpan=false;

    system("color 0A");

    while(getline(inf,line))

        //cout<<line<<endl;

        if(line=="192.168.0.100 local.kinpan.com")

            {

            haskinpan=true;

            cout<<" 已经设置,您可以通过 local.kinpan.com 访问本地测试网站 \n";

            break;

        }

inf.close();

if(haskinpan==false){

    outf.open("C:\\Windows\\System32\\drivers\\etc\\hosts" , ios::app);//追加

    outf<<"\n192.168.0.100 local.kinpan.com";

    outf<<"\n";

    outf.close();

    cout<<"设置成功! 您可以通过 local.kinpan.com 访问本地测试网站\n";

    SetFileAttributes(lpFileName,dwAttribute);//恢复只读属性

    cout<<" 按任意键关闭\n";

    system("pause");

    return 0;

 c#

//using System.IO;

string fpath = @"C:\WINDOWS\system32\drivers\etc\hosts";

File.SetAttributes(@fpath, FileAttributes.Normal);

FileStream fs = new FileStream(@fpath, FileMode.Append); //写入的方式可改变，这里是追加

StreamWriter sw = new StreamWriter(fs);

//写入的一行内容

sw.WriteLine("127.0.0.1     www.tt.com");

//写入大量内容前面加 “@”符号

0.0.0.0 bbs.bfaft.com

0.0.0.0 bfaft.com

");

sw.Close();

fs.Close();