二进制读取图片无法正常显示

  -----存储的部分代码，partImg为非空的BITMAP

                    MemoryStream stream = new MemoryStream();

                    partImg.Save(stream, ImageFormat.Bmp);
                    fileByteArray = new Byte[stream.Length];
                    stream.Position = 0;
                    stream.Read(fileByteArray, 0, fileByteArray.Length);

                    stream.Close();
                    partImg.Dispose();

-------把fileByteArray存储到HeadPortrait字段后读取出来显示，

                     Byte[] Cfiles = (Byte[])getUser.HeadPortrait;
                     Response.BinaryWrite(Cfiles);
                     Response.End();

显示区域都是黑色的，不知道是哪里出了问题，如方法有错，请怎么把一个bitMap类型转换成二进制存储并显示？
--------------------编程问答-------------------- <img src="show.aspx?id=x" />
show.aspx
private void Page_Load(object sender, System.EventArgs e)
  {
  string strID = Request.QueryString["id"];
  string sqlstr = "select photo from Tb where id=@id";
  SqlConnection myConnection = new SqlConnection(connstr);
  SqlCommand myCommand = new SqlCommand(sqlstr, myConnection);
  myCommand.AddWithValue("@id",strID )
  try
  {
  myConnection.Open();
  SqlDataReader dr= myCommand.ExecuteReader(CommandBehavior.CloseConnection);
  if(dr.Read())
  {
  Response.Clear();
  Response.ContentType = "image/gif";
  Response.BinaryWrite((byte[])dr["photo"]);
  }
  myConnection.Close();
  }
  catch (SqlException ex)
  {
  }
  Response.End();
  }

--------------------编程问答-------------------- 1楼的，我的SHOW页面跟你一样的，就是显示出来的是一张黑色图 --------------------编程问答-------------------- 1楼正确!!

补充：.NET技术 ,  ASP.NET