关于分页控件绑定数据的问题

源代码：
private void BindUserList()
        {


            //int cup = Convert.ToInt32(this.lb_CurrentPage.Text);
            PagedDataSource ps = new PagedDataSource();
            ps.DataSource = Anwerbeformularbll.GetAnwerbeformular();
            ps.AllowPaging = true; ps.PageSize = 10;
            //每页显示的数据的行数
            //ps.CurrentPageIndex = cup - 1;
            //lb_count.Text = ps.DataSourceCount.ToString(); //获取记录总数
            //lb_page.Text = ps.PageCount.ToString(); //获取总页数



            int CurPage;
            if (Request.QueryString["Page"] != null && Request.QueryString["Page"] != "0")
            {
                CurPage = Convert.ToInt32(Request.QueryString["Page"]);
            }
            else
            {
                CurPage = 1;
            }

            ps.CurrentPageIndex = CurPage - 1;
            int Counts = ps.PageCount;
            labPage.Text = "共 " + Counts.ToString() + " 页";
            if (!ps.IsFirstPage && !ps.IsLastPage)
            {
                first.Visible = true;
                first.Enabled = true;
                last.Visible = true;
                last.Enabled = true;
                next.Visible = true;
                next.Enabled = true;
                up.Visible = true;
                up.Enabled = true;
                this.first.NavigateUrl = Request.CurrentExecutionFilePath + "?Page=1";
                this.last.NavigateUrl = Request.CurrentExecutionFilePath + "?Page=" + Convert.ToString(Counts);
                up.NavigateUrl = Request.CurrentExecutionFilePath + "?Page=" + Convert.ToString(CurPage - 1);
                next.NavigateUrl = Request.CurrentExecutionFilePath + "?Page=" + Convert.ToString(CurPage + 1);
                lb_Currentpage.Text = CurPage.ToString();
            }
            else if (!ps.IsFirstPage && ps.IsLastPage)
            {
                last.Visible = false;
                last.Enabled = false;
                up.Visible = true;
                up.Enabled = true;
                next.Visible = false;
                next.Enabled = false;

                this.first.NavigateUrl = Request.CurrentExecutionFilePath + "?Page=1";
                up.NavigateUrl = Request.CurrentExecutionFilePath + "?Page=" + Convert.ToString(CurPage - 1);
                lb_Currentpage.Text = CurPage.ToString();
            }
            else if (ps.IsFirstPage && !ps.IsLastPage)
            {
                first.Visible = false;
                first.Enabled = false;
                next.Visible = true;
                next.Enabled = true;
                up.Visible = false;
                up.Enabled = false;
                this.last.NavigateUrl = Request.CurrentExecutionFilePath + "?Page=" + Convert.ToString(Counts);
                next.NavigateUrl = Request.CurrentExecutionFilePath + "?Page=" + Convert.ToString(CurPage + 1);
                lb_Currentpage.Text = CurPage.ToString();
            }
            else
            {
                first.Visible = false;
                first.Enabled = false;
                next.Visible = false;
                next.Enabled = false;
                up.Visible = false;
                up.Enabled = false;
                last.Visible = false;
                last.Enabled = false;
            }

            UserList.DataSource = ps;

            UserList.DataBind();

        }

现在我想通过点击页面上面的按钮，进行有条件的筛选，但是这个页面数据绑定上面会有问题
比如一页中，最多显示15个数据，但是我查出来有16条，按照正常的话，我点下一页，应该就能看到第16条数据了，但是现在我一点下一页，数据又会因为绑定的问题，变成未点击按钮前的样子
现在我想根据筛选出来的值，在重新绑定数据，应该就可以解决掉了，但是不会写，希望大家帮我看下怎么改好哦 --------------------编程问答-------------------- 参考

 public void dlBind()

    {

        int curpage = Convert.ToInt32(this.labPage.Text);

        PagedDataSource ps = new PagedDataSource();

        sqlconn = myCon.getCon();

        sqlconn.Open();

        string sqlstr = "select a.*,b.* from tb_Card as a join tb_Module as b on a.ModuleID=b.ModuleID";

        SqlDataAdapter MyAdapter = new SqlDataAdapter(sqlstr, sqlconn);

        DataSet ds = new DataSet();

        MyAdapter.Fill(ds, "tb_Card");

        ps.DataSource = ds.Tables["tb_Card"].DefaultView;

        ps.AllowPaging = true; //是否可以分页

        ps.PageSize = 2; //显示的数量

        ps.CurrentPageIndex = curpage - 1; //取得当前页的页码

        this.lnkbtnUp.Enabled = true;

        this.lnkbtnNext.Enabled = true;

        this.lnkbtnBack.Enabled = true;

        this.lnkbtnOne.Enabled = true;

        if (curpage == 1)

        {

            this.lnkbtnOne.Enabled = false;//不显示第一页按钮

            this.lnkbtnUp.Enabled = false;//不显示上一页按钮

        }

        if (curpage == ps.PageCount)

        {

            this.lnkbtnNext.Enabled = false;//不显示下一页

            this.lnkbtnBack.Enabled = false;//不显示最后一页

        }

        this.labBackPage.Text = Convert.ToString(ps.PageCount);

        this.dlContent.DataSource = ps;

        this.dlContent.DataKeyField = "CardID";

        this.dlContent.DataBind();

    }

    protected void lnkbtnOne_Click(object sender, EventArgs e)

    {

        this.labPage.Text = "1";

        this.dlBind();

    }

    protected void lnkbtnUp_Click(object sender, EventArgs e)

    {

        this.labPage.Text = Convert.ToString(Convert.ToInt32(this.labPage.Text) - 1);

        this.dlBind();

    }

    protected void lnkbtnNext_Click(object sender, EventArgs e)

    {

        this.labPage.Text = Convert.ToString(Convert.ToInt32(this.labPage.Text) + 1);

        this.dlBind();

    }

    protected void lnkbtnBack_Click(object sender, EventArgs e)

    {

        this.labPage.Text = this.labBackPage.Text;

        this.dlBind();

    }

补充：.NET技术 ,  ASP.NET