DataList 分页

DataSet ds = new  DataSet();
                da.Fill(ds, " asd " );
                PagedDataSource objpage = new  PagedDataSource();
                objpage.DataSource = ds.Tables[ 0 ].DefaultView;
                objpage.AllowPaging = true ;
                objpage.PageSize = 11 ;
                 int  TotalRecord = ds.Tables[ 0 ].Rows.Count;
                 int  pagecount = (TotalRecord + objpage.PageSize - 1 ) / objpage.PageSize;
                 int  curr;
                 if (Request.QueryString[ " page " ] != null )
                 ... {
                    curr=int.Parse(Request.QueryString["page"]);
                }
                 else
                 ... {
                    curr=1;
                }
                objpage.CurrentPageIndex = curr - 1 ;
                 if ( ! objpage.IsFirstPage)
                 ... {
                    this.lnkprv.NavigateUrl=Request.CurrentExecutionFilePath+"?page="+Convert.ToString(curr-1);
                }
                 if ( ! objpage.IsLastPage)
                 ... {
                    this.lnknext.NavigateUrl=Request.CurrentExecutionFilePath+"?page="+Convert.ToString(curr+1);
                }
                 this .firstpage.NavigateUrl = Request.CurrentExecutionFilePath + " ?page= " + Convert.ToString( 1 );
                 this .endpage.NavigateUrl = Request.CurrentExecutionFilePath + " ?page= " + pagecount;
                 this .DataList1.DataSource = objpage;
                 this .DataList1.DataBind();