Use a BindingSource to bind your table to the DataGridView, then use the BindingSource's Sort property to specify the columns and directions to sort. E.g.: bindingSource.Sort = "username, filename"; You can also specify the direction of the sort, e.g.: bindingSource.Sort = "username ASC, filename DESC";

I have try to modify PDF with itextsharp.dll, ReportNet.dll and SharpPDF too. But I don't found any example from those .dll to modify PDF but only to dynamic create PDF.