protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
Load_Data_Grid();
load_dropdown();
SaleInvoice s = new SaleInvoice();
tblSaleInvoice salesinvoice = new tblSaleInvoice();
int maxid = s.GetId();
lblInvoiceNo.Text = (maxid + 1).ToString();
}
}
