unable to upload image..

try
            {
                FileUpload img = (FileUpload)imgUpload;
                if (imgUpload.HasFile)
                {
                    string contentType = img.PostedFile.ContentType;
                    byte[] fileData = new byte[img.PostedFile.InputStream.Length];
                    img.PostedFile.InputStream.Read(fileData, 0, fileData.Length);
                    SqlConnection con = new SqlConnection();
                    con.ConnectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
                    con.Open();
                    string sql = "INSERT INTO image(img_name,img_photo) VALUES(@enm, @eimg) SELECT @@IDENTITY";
                    SqlCommand cmd = new SqlCommand(sql, con);
                    cmd.Parameters.AddWithValue("@enm", txtEName.Text.Trim());
                    cmd.Parameters.AddWithValue("@eimg", fileData);
                    int id = Convert.ToInt32(cmd.ExecuteScalar());
                    lblResult.Text = String.Format("Product ID is {0}", id);
                }
            }
            catch
            {
                lblResult.Text = "There was an error";
            }