What piece of code is missing when navigating to next/previous page in Gridview page-index_changing event?

protected void grid_employee_pageindexchanging(object sender, GridViewPageEventArgs e)
{
try
{
grid_employee.pageindex = e.newpageindex;
}
catch(exception ex)
{
throw ex;
}
}

Note :- Bindgridview Function is nothing but writing binding code inside Bindgridview Function like select statement,fill dataset and assign dataset to gridview datasource and bind it.

If you write only grid_employee.databind() after grid_employee.pageindex = e.newpageindex. and when you are changing page, then in that case it will not work means your page will not navigate to next page.