private void GetPostPageWise(int pageIndex)
{
posts = new PostBLL();
string catID = RouteData.Values["Id"].ToString();
rptPostItem.DataSource = posts.GetListPostsByCategoryIDPageWise(pageIndex, PageSize, Convert.ToInt32(catID));
rptPostItem.DataBind();
this.PopulatePager(rptPager, posts.CountListPostsByCategoryIDPageWise(Convert.ToInt32(catID)), pageIndex, PageSize);
}