convert gridview data into pdf according to selected date

When you select date pass that to query retrieve data bind to datatable then no need to change your gridview code Go through below https://www.c-sharpcorner.com/article/datatable-to-pdf-in-c-sharp/ Grid view to PDF https://www.c-sharpcorner.com/UploadFile/009464/how-to-export-gridview-to-pdf-using-itextsharp-library/ https://www.c-sharpcorner.com/UploadFile/raj1979/export-grid-view-data-to-pdf-using-itextsharp/