长二进制数据输出乱码问题 求大神帮忙！

Question

string strCnn = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|\att2000.mdb;Persist Security Info=True";
OleDbConnection myConnection = new OleDbConnection(strCnn);
myConnection.Open();
OleDbCommand command = new OleDbCommand("select * from Template ", myConnection);
OleDbDataReader dr = command.ExecuteReader();

        byte[] buff = null;
        string aaa = "";
        string bbb = "";
        if (dr.Read())
        {
            buff = (byte[])dr["Template4"];
        }
        //System.IO.MemoryStream ms = new System.IO.MemoryStream(buff);
        ////通过流对象建立Bitmap
        //System.Drawing.Bitmap bmp = new Bitmap(ms);
        //bmp.Save("e:\\SampImag.jpg");
        myConnection.Close();
        System.IO.FileStream stream = new System.IO.FileStream(Server.MapPath("m.txt"),System.IO.FileMode.CreateNew, System.IO.FileAccess.Write);
        System.IO.BinaryWriter bw = new System.IO.BinaryWriter(stream);
        bw.Write(buff);
        bw.Close();
        stream.Close();

取的是别人数据库上的数据，也不知道原来什么格式。谁能帮忙指点下！

Answer 1

//System.Drawing.Bitmap bmp = new Bitmap(ms);
//bmp.Save("e:\SampImag.jpg");

那您试试注释掉的代码，看能否保存成功？？、