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();