private void frmPurchaseOrder_Load(object sender, EventArgs e)
{
DataTable dt = bllss4.getAllSuppliers();
comboBox1.DataSource = dt;
comboBox1.DisplayMember = "SupplyName";
comboBox1.ValueMember = "ID";
DataTable dt1 = bllss4.getAllWareHouses();
comboBox2.DataSource = dt1;
comboBox2.DisplayMember = "WareHouseName";
comboBox2.ValueMember = "ID";
DataTable dt2 = bllss4.getAllPart();
comboBox3.DataSource = dt2;
comboBox3.DisplayMember = "PartName";
comboBox3.ValueMember = "ID";
textBox1.Enabled = false;
}
