UPDATE command returning null :(.. why?

protected void GVImages_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {

            string ID = ((Label)GVImages.Rows[e.RowIndex].FindControl("lblID")).Text;

            string Name = ((TextBox)GVImages.Rows[e.RowIndex].FindControl("txtName")).Text;
            FileUpload f = ((FileUpload)GVImages.Rows[e.RowIndex].FindControl("FileUpload2"));
           
            byte[] imageBytes = null;
           
            if (f.HasFile)
            {
                //variable to store the image content
                imageBytes = new byte[f.PostedFile.ContentLength];
              
                HttpPostedFile uploadImage = f.PostedFile;
                //read the image stream from the post and store it in imageBytes
                uploadImage.InputStream.Read(imageBytes, 0, (int)f.PostedFile.ContentLength);
            }

            con.Open();
          MySqlCommand cmd = new MySqlCommand("Update images set Name=@Name,Content=@Content where ID="+ID, con);
      
            cmd.Parameters.Add("@ID", MySqlDbType.Int16).Value = ID;
  
            cmd.Parameters.Add("@Name", MySqlDbType.VarChar).Value= Name;

            cmd.Parameters.Add("@Content", MySqlDbType.LongBlob).Value = imageBytes;

            cmd.Connection = con;
            cmd.ExecuteNonQuery();
            
            GVImages.EditIndex = -1;
            con.Close();
            databind();
      
        }