ازاین ارور میگیره



dataGridView1.DataBind();

این هم کد عکس




 private void button2_Click(object sender, EventArgs e)

        {

            if (txtn.Text != "" & txtfn.Text != "" & txtshsh.Text != "" & txtid.Text != "" & radf.Text != "" & txtin.Text != "" & txtsal.Text != "" & txtnu.Text != "" & txtem.Text != "" & txtav.Text != "" & txtj.Text != "" & txtadd.Text != "" )

            {

                cn.Open();

                cmd.CommandText = "insert into student (name,fname,shsh,id,field,input,year,tnumber,email  ,average,jensiat,address,image)  values (N'" + txtn.Text + "',N'" + txtfn.Text + "',N'" + txtshsh.Text + "',N'" + txtid.Text + "',N'" + radf.Text + "',N'" + txtin.Text + "',N'" + txtsal.Text + "',N'" + txtnu.Text + "',N'" + txtem.Text + "',N'" + txtav.Text + "',N'" + txtj.Text + "',N'" + txtadd + "',@image)";

                cmd.Parameters.AddWithValue("@image", ImageToByte(pictureBox1.Image));

                cmd.ExecuteNonQuery();

                cmd.Clone();

                MessageBox.Show("اطلاهات با موفقیت ثبت شد", "ثبت اطلاعات");

                cn.Close();

                txtn.Text = "";

                txtfn.Text = "";

                txtshsh.Text = "";

                txtid.Text = "";

                radf.Text = "";

                txtin.Text = "";

                txtsal.Text = "";

                txtnu.Text = "";

                txtem.Text = "";

                txtav.Text = "";

                txtj.Text = "";

                txtadd.Text = "";

                loadlist();



////////////دکمه انتخاب عکس

  OpenFileDialog OpenFileDialog1 = new OpenFileDialog();

            openFileDialog1.Filter = "Image Files|*.bmp;*.jpg;*.jpeg;*.png;*.gif ";

            if (openFileDialog1.ShowDialog() == DialogResult.OK)

            {

                pictureBox1.Image = new Bitmap(openFileDialog1.FileName);



               txtimage.Text = openFileDialog1.SafeFileName;

                pictureBox1.ImageLocation = openFileDialog1.FileName;

            }

این هم تبدیلش به باینری


 public static byte[] ImageToByte(Image img)

        {

            ImageConverter converter = new ImageConverter();

            return (byte[])converter.ConvertTo(img, typeof(byte[]));





        }