private void sal_srch_name_SelectedIndexChanged(object sender, EventArgs e)
{
DataSet ds = null;
ds = lgic.search("perchas", "saller_name", sal_srch_sal_name.Text);
sal_gridview.DataSource = ds.Tables[0];
count(ds);
}
private void invn_srch_cst_name_SelectedIndexChanged(object sender, EventArgs e)
{
DataSet ds = null;
ds = lgic.search("invoice", "customer_name", invn_srch_cst_name.Text);
invn_gridview.DataSource = ds.Tables[0];
count(ds);
}