c#读取图像保存到数据库中(数据库保存图片)

注:mytools.g_photofield为数据库表中的图象字段名称
//将图片保存到数据库中
    if(this.picphoto.image==null)
    {
     m_datarow[mytools.g_photofield]=dbnull.value;
    }
    else
    {
     try
     {
      memorystream ms = new memorystream ();
      picphoto.image.save (ms, system.drawing.imaging.imageformat.bmp);
      byte [] mydata = new byte [ms.length ];
      ms.position = 0;
      ms.read (mydata,0,convert.toint32 (ms.length ));
      m_datarow[mytools.g_photofield] = mydata;

     }
     catch(system.exception ee)
     {
      messagebox.show(ee.message);
     }
    }//else

//读取图象
    if(this.m_datarow[mytools.g_photofield]!=dbnull.value)
    {
     try
     {
      byte[] byteblobdata =  new byte[0];
      byteblobdata = (byte[])m_datarow[mytools.g_photofield];
      memorystream stmblobdata = new memorystream(byteblobdata);
      this.picphoto.image= image.fromstream(stmblobdata);
     }
     catch(exception ex)
     {
      messagebox.show(ex.message);
     }
    }
    else
    {
     this.picphoto.image= null;
    }