public void bindsuppliername()
    {
        try
        {
            cbl_supplier.Items.Clear();

            ds = queryObject.BindVendorNamevendorpk_inv();
            if (ds.Tables[0].Rows.Count > 0)
            {
                cbl_supplier.DataSource     = ds;
                cbl_supplier.DataTextField  = "VendorCompName";
                cbl_supplier.DataValueField = "VendorPK";
                cbl_supplier.DataBind();

                if (cbl_supplier.Items.Count > 0)
                {
                    for (i = 0; i < cbl_supplier.Items.Count; i++)
                    {
                        cbl_supplier.Items[i].Selected = true;
                    }
                    txt_supplier.Text   = "Supplier Name(" + cbl_supplier.Items.Count + ")";
                    cb_supplier.Checked = true;
                }
            }
            else
            {
                txt_supplier.Text   = "--Select--";
                cb_supplier.Checked = false;
            }
        }
        catch
        {
        }
    }