单击PICTUREBOX，把图片弄到这个空间里面去。
如何把picturebox里面的图片存入数据库。又如何从数据库中读取这个图片。

我发过这个帖子，解决拉。查下~

                OpenFileDialog FDup = new OpenFileDialog ();
                FDup.Filter = "Image(*.jpg)|*.jpg|(*.bmp)|*.bmp|(*.png)|*.png";
                if (FDup.ShowDialog() == DialogResult.OK)
                {
                    FilePath = FDup.FileName;
                    this.txbPath.Text = FilePath;
                }

            //把图片转换为数据流
                        FileName = this.txbPath.Text;
                        FileStream Fstream = new FileStream(FileName, FileMode.Open, FileAccess.Read);
                        Byte[] mybtye = new Byte[Fstream.Length];
                        int bt = Fstream.Read(mybtye, 0, Convert.ToInt32(Fstream.Length));//必需的.把数据流转换为int
                        Fstream.Close();
 
                        F_str_str = "insert into Document_Image (Document_ID,Image) values('" + this.txbDocument_ID.Text.ToString().Trim() + "',@Image)";
                        SqlConnection sqlcon = basoprate.GetCon();
                        sqlcon.Open();
                        SqlCommand mycmd = new SqlCommand(F_str_str, sqlcon);
                        //设置变量@Image值
                        SqlParameter sqlptr = new SqlParameter("@Image", SqlDbType.Image);
                        sqlptr.Value = mybtye;
                        mycmd.Parameters.Add(sqlptr);
                        mycmd.ExecuteNonQuery();
************************************************************************************
            string F_str_str = "Select Image from Document_Image";
            byte[] mybyte = new byte[0];
            SqlDataReader myread = basOprt.GetRead(F_str_str);
            while (myread.Read())
            {
                mybyte = (byte[])myread["Image"];//转换为进制数
                MemoryStream Mstream = new MemoryStream(mybyte);//把数据转换为数据流
                Image img = Image.FromStream(Mstream, true);//把数据流转换为图片
                //设置图片显示格式
                Bitmap map = new Bitmap(img);
                Point pot = new Point(map.Size);
                if (pot.X > pictureBox.Width || pot.Y > pictureBox.Height)
                {
                    pictureBox.SizeMode = PictureBoxSizeMode.Zoom;
                }
                else
                {
                    pictureBox.SizeMode = PictureBoxSizeMode.CenterImage;
                }
                pictureBox.Image = img;
            }