private void frmIventoryReport_Load(object sender, EventArgs e)
{
DataTable dt1 = bllss4.getAllWareHouses();
comboBox1.DataSource = dt1;
comboBox1.DisplayMember = "WareHouseName";
comboBox1.ValueMember = "ID";
dt2 = bllss4.getIventoryReport(int.Parse(comboBox1.SelectedValue.ToString()));
dataGridView1.DataSource = dt2;
}