winforms - rdlc report not showing latest inserted data c# -

i trying show report on same form when user clicks on button insert record in database.

here's situation: below code, data shows when write code on separate form.

private void invoice_load(object sender, eventargs e) {     con.open();     sqlcommand cmd = new sqlcommand(         "select top 1 invoiceid sale order date desc", con);     sqldatareader dr = cmd.executereader();      if (dr.read())     {         int invoiceid = int.parse(dr[0].tostring());         this.saletableadapter.fill(this.estoredbdataset.sale,invoiceid);     }      this.reportviewer1.refreshreport();  } 

however, it's not showing when code in if statement below:

{      //insert record code      this.saletableadapter.fill(this.estoredbdataset.sale,invoiceid);      this.reportviewer1.refreshreport(); }