Insert/update specific row in SQL database for an image?

I am using two ways:

private void button_Upload_Click(object sender, EventArgs e)
        {
            string EventNumber = comboBox_EventNumber.Text;
            OpenFileDialog dialog = new OpenFileDialog();
            dialog.Filter = "png Files(*.png)|*.png|jpg Files (*.jpg)|*.jpg|All Files(*.*)|*.*";
            if(dialog.ShowDialog() == DialogResult.OK)
            {
                imgLocation = dialog.FileName.ToString();
                pictureBox1.ImageLocation = imgLocation;
                Filename = dialog.FileName;
               
            }
            DialogResult result = new DialogResult();
            result = MessageBox.Show("A you sure u want to save this Picture", "Saving Picture", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
            if (result == DialogResult.Yes)
            {
                try
                {
                    byte[] images = null;
                    FileStream stream = new FileStream(imgLocation, FileMode.Open, FileAccess.Read);
                    BinaryReader br = new BinaryReader(stream);
                    images = br.ReadBytes((int)stream.Length);

                    string query = "Update Events SET FileName = '" + @Filename + "', Cover = '" + @images + "'where ID = '" + EventNumber + "'";
                    SqlCommand updateCommand = new SqlCommand(query);
                    updateCommand.Parameters.AddWithValue("@Filename", Filename);
                    updateCommand.Parameters.AddWithValue("@images", @images);

                    int row = dataBase.executeQuery(updateCommand);

                    if (row >= 1)
                    {
                        MessageBox.Show("Image Uploaded Successfully");
                    }
                    else
                    {
                        MessageBox.Show("Error occured");
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
        }

It works but not as I should can specific the row where I want to insert/update ,but when the data is inserted instead of getting "0xFFD8FFE000104A46494600010101000000000000FFE20240494....."(a lot of more characters) i get "0x53797374656D2E427974655B5D".
The problem is when I try to retrieve the image from the database I can not retrieve it from the second one only from the first one.

using (OpenFileDialog openFileDialog = new OpenFileDialog() { Filter = "JPEG|*.jpg|PNG|*.PNG|ALL|*.*", ValidateNames = true, Multiselect = false })
           {
               if (openFileDialog.ShowDialog() == DialogResult.OK)
               {
                   Filename = openFileDialog.FileName;
                   pictureBox1.Image = Image.FromFile(Filename);
                   using (AmericanCornerMembersEntities1 ACME = new AmericanCornerMembersEntities1())
                   {
                       MyPic pic = new MyPic() { Filename = Filename, Data = ConvertImageToBinary(pictureBox1.Image) };
                       ACME.MyPics.Add(pic);
                       await ACME.SaveChangesAsync();
                       MessageBox.Show("Succusfully Saved");

Here it is saved as it should the data but I can not specific which row it should update/insert.

byte[] ConvertImageToBinary (Image img)
        {
            using (MemoryStream ms = new MemoryStream())
            {
                img.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
                return ms.ToArray();
            }

        }

What I have tried:

What I tried to make it work is:
<pre>        /* byte[] images = null;
     FileStream stream = new FileStream(imgLocation, FileMode.Open,FileAccess.Read);
              BinaryReader br = new BinaryReader(stream);
              images = br.ReadBytes((int)stream.Length);*/
              var images = ConvertImageToBinary(pictureBox1.Image);

Still same results even with or without commenting out that part.