c#直接读写物理硬盘引导区

其实读写硬盘引导区和是不是c#没有关系，只要能用windows api的语言都可以。

原理就是用createfile这个api，获得物理硬盘的handle，然后用FileStream读取就可以了，FileStream有几个构造函数是以句柄方式初始化的。

\\.\PHYSICALDRIVE0  就是第一个物理硬盘了，其他的就是1、2、3……

using System;
using System.IO;
using System.Runtime.InteropServices;

namespace test
{
    class test
    {
        [DllImport("kernel32", SetLastError = true)]
        static extern IntPtr CreateFile(
        string FileName,
        FileAccess DesiredAccess,
        FileShare ShareMode,
        IntPtr SecurityAttributes,
        FileMode CreationDisposition,
        int FlagsAndAttributes,
        IntPtr hTemplate
        );
        public const int FILE_FLAG_NO_BUFFERING = 0x20000000;
        public static void Main()
        {
            IntPtr handle = CreateFile(@"\\.\PHYSICALDRIVE0", FileAccess.Read, FileShare.None, IntPtr.Zero, FileMode.Open, FILE_FLAG_NO_BUFFERING, IntPtr.Zero);
            FileStream disk = new FileStream(handle, FileAccess.Read);
            byte[] outBuffer = new byte[512];
            byte[] inBuffer = new byte[512];
            outBuffer[0] = 1;
            outBuffer[1] = 0;
            outBuffer[2] = 1;
            disk.Seek(0, SeekOrigin.Begin);
            for (int i = 0; i < 512; i++)
            {
                inBuffer[i] = (byte)disk.ReadByte();
            }
            for (int i = 0; i < 512; i++)
            {
                Console.Write(inBuffer[i].ToString("x2")+" ");
            }
            Console.Read();
        }
    }
}

当然不只是可以读取引导区，整个硬盘都可以啊。

另外，既然获得了硬盘的FileStream了，那么就不止可以Read了，当然也可以Write了，不过FileAccess什么的就得改改了。

 

干脆把改写的也贴上吧，我在虚拟机里实验的，运行后就这样了，没敢在真机试，有兴趣的同学可以在真机运行一下以下代码。

using System;
using System.IO;
using System.Runtime.InteropServices;

namespace test
{
    class test
    {
        [DllImport("kernel32", SetLastError = true)]
        static extern IntPtr CreateFile(
        string FileName,
        uint DesiredAccess,
        uint ShareMode,
        IntPtr SecurityAttributes,
        uint CreationDisposition,
        int FlagsAndAttributes,
        IntPtr hTemplate
        );
        public const int FILE_FLAG_NO_BUFFERING = 0x20000000;
        public static void Main()
        {
            IntPtr handle = CreateFile(@"\\.\PHYSICALDRIVE0", 0x40000000|0x80000000, 0 , IntPtr.Zero, 3, FILE_FLAG_NO_BUFFERING, IntPtr.Zero);
            Console.WriteLine(handle.ToString());
            FileStream disk = new FileStream(handle,FileAccess.ReadWrite);
            byte[] bt = new byte[512];
            Random rnd = new Random();
            rnd.NextBytes(bt);
            for (int i = 0; i < bt.Length; i++)
            {
                Console.Write(bt[i].ToString("x2") + " ");
            }
            disk.Seek(0, SeekOrigin.Begin);
            try
            {
                disk.Write(bt, 0, 512);
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }
        }
    }
}