private void btnSave_Click(object sender, EventArgs e)
        {
            int er = 0;

            ep.Clear();

            if (cmbProduct.SelectedValue == null || cmbProduct.SelectedValue == null)
            {
                er++;
                ep.SetError(cmbProduct, "Product Required");
            }

            if (txtTitle.Text == "")
            {
                er++;
                ep.SetError(txtTitle, "Title Required");
            }

            if (pbImage.Image == null)
            {
                er++;
                ep.SetError(pbImage, "Image Required");
            }

            if (er > 0)
            {
                return;
            }

            ProductImage productImage = new ProductImage();

            productImage.ProductId = Convert.ToInt32(cmbProduct.SelectedValue);
            productImage.Title     = txtTitle.Text;
            productImage.Image     = FileImage.ImageToByte(pbImage.Image);

            if (productImage.Insert())
            {
                MessageBox.Show(@"Image Saved");
                cmbProduct.SelectedValue = -1;
                txtTitle.Text            = "";
                pbImage.Image            = null;
                cmbProduct.Focus();
            }

            else
            {
                MessageBox.Show(productImage.Error);
            }
        }
        private void buttonSave_Click(object sender, EventArgs e)
        {
            int error = 0;

            errorProvider.Clear();

            if (comboBoxProduct.Text == "")
            {
                error++;
                errorProvider.SetError(comboBoxProduct, "Required");
            }

            if (textBoxTitle.Text == "")
            {
                error++;
                errorProvider.SetError(textBoxTitle, "Required");
            }

            if (pictureBoxImage.Image == null)
            {
                error++;
                errorProvider.SetError(pictureBoxImage, "Required");
            }

            if (error > 0)
            {
                return;
            }

            DAL.ProductImage productImage = new ProductImage();
            productImage.ProductId = Convert.ToInt32(comboBoxProduct.SelectedValue);
            productImage.Title     = textBoxTitle.Text;
            productImage.Image     = DAL.FileImage.ImageToByte(pictureBoxImage.Image);

            if (productImage.Insert())
            {
                MessageBox.Show("Product Image save");
                comboBoxProduct.SelectedValue = -1;
                textBoxTitle.Text             = "";
                pictureBoxImage.Image         = null;
                comboBoxProduct.Focus();
            }
            else
            {
                MessageBox.Show(productImage.Error);
            }
        }