use this in your code:

CrystalReportViewer1.ShowFirstPage(); // for first page

CrystalReportViewer1.ShowLastPage(); //for Last page

CrystalReportViewer1.ShowNextPage(); // for Next page

CrystalReportViewer1.ShowPreviousPage(); // for Previous Page

you should enable the autopostback property of your Dropdownlist and then you can write something like this. protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)

{

if (DropDownList1.SelectedItem.Value == "1")

{

CrystalReportViewer1.ShowFirstPage();

}

 

}

thanks