private void button1_Click(object sender, EventArgs e)
{
if (string.IsNullOrEmpty(textBox1.Text) || string.IsNullOrEmpty(textBox2.Text) || string.IsNullOrEmpty(textBox3.Text) || string.IsNullOrEmpty(textBox4.Text))
{
MessageBox.Show("One or more required fields are missing", "Missing Field", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
return;
}
Supplier supplier = new Supplier(textBox1.Text, textBox2.Text, textBox3.Text, textBox4.Text);
supplier.addSupplier(textBox1.Text, textBox2.Text, textBox3.Text, textBox4.Text, db.con);
this.Refresh();
this.DialogResult = DialogResult.OK;
this.Close();
}