小弟写了一个分页用户控件，有关问题是不知道如何刷新父页面的Gridview

小弟写了一个分页用户控件，问题是不知道怎么刷新父页面的Gridview


用户控件样子如上

用户控件页面代码

<asp:UpdatePanel ID="UpdatePanel1" runat="server">

<ContentTemplate>

<table width="100%">

<td style="height: 25px" >

<asp:linkbutton id="lkbtnFirst" onclick="PagerButtonClick" CommandArgument="0" runat="server"><span style="font-weight:bold">首页</span></asp:linkbutton>

<asp:linkbutton id="lkbtnUP" onclick="PagerButtonClick" CommandArgument="prev" runat="server"><span style="font-weight:bold">上一页</span></asp:linkbutton >

<asp:linkbutton id="lkbtnNext" onclick="PagerButtonClick" CommandArgument="next" runat="server"><span style="font-weight:bold">下一页</span></asp:linkbutton>

<asp:linkbutton id="lkbtnLast" onclick="PagerButtonClick" CommandArgument="last" runat="server"><span style="font-weight:bold">尾页</span></asp:linkbutton>

&nbsp;&nbsp;<span style="font-weight:bold; color:Red"> 第<asp:label id="lblCurrentIndex" runat="server">1</asp:label>页/总<asp:label id="lblSumPageCount" runat="server"></asp:label>页</span>&nbsp;&nbsp; 跳转&nbsp;&nbsp;<asp:TextBox ID="txtJump" runat="server" Width="30px">1</asp:TextBox><asp:linkbutton id="btnGo" runat="server" causesvalidation="False" text="GO" OnClick="btnGo_Click" />

</td></tr></table>

</ContentTemplate>

</asp:UpdatePanel>

用户控件后台代码

public partial class UserContorl_PagingContorl : System.Web.UI.UserControl

{

    private int _pageindex;//当前页数


    public int Pageindex

    {

        get { return _pageindex; }

        set { _pageindex = value; }

    }


    private int _sumpage;//总页数


    public int SumPage

    {

        get { return _sumpage; }

        set { _sumpage = value; }

    }

    public UserContorl_PagingContorl() //初始化页数

    {

        Pageindex = 1;

    }


    protected void Page_Load(object sender, EventArgs e)

    {

        lblSumPageCount.Text = Convert.ToString(SumPage);

    }


    public void PagerButtonClick(object sender, EventArgs e) //上一页，下一页等事件

    {

        LinkButton linkbtn = (LinkButton)sender;

        Page p = this.Parent.Page;

        switch (linkbtn.ID.Trim())

        {

            case "lkbtnFirst":

                Pageindex = 1;

                //--

                this.lblCurrentIndex.Text = "1";

                txtJump.Text = lblCurrentIndex.Text;

                

                break;

            case "lkbtnUP":

                Pageindex = Convert.ToInt32(this.lblCurrentIndex.Text) - 1;

                //--

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

                txtJump.Text = lblCurrentIndex.Text;

                break;

            case "lkbtnNext":

                Pageindex = Convert.ToInt32(this.lblCurrentIndex.Text) + 1;

               //--

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