Repeater简单分页

<asp:Panel ID="Panel1" runat="server" >
             <table class="imagetable">
            <tr>
                <th>ID</th>
                <th>银行名称</th>
                <th>是否停用</th>
                <th>操作</th>
            </tr>
    <asp:Repeater ID="list" runat="server" OnItemCommand="list_ItemCommand">
        <ItemTemplate>
            <tr>
                <td><%# Eval("id")%></td>
                <td><%# Eval("name")%></td>
                
                <td><asp:LinkButton ID="LinkButton1" runat="server" CommandArgument='<%#Eval("id") %>' CommandName="update"><%# Set_jinyong(Eval("id").ToString(),Eval("is_rec").ToString()) %></asp:LinkButton></td>
                <td>
                    <%--<a href="#">添加下级地区</a>|--%>
                    <a href="Bank_update.aspx?id=<%#Eval("id") %>">编辑</a>
                    |<asp:LinkButton ID="LinkButton2" runat="server" CommandArgument='<%#Eval("id") %>' CommandName="dele" OnClientClick= "return confirm( '你确定要删除这条记录? '); ">删除</asp:LinkButton>
                </td>
            </tr>
        </ItemTemplate>
    </asp:Repeater>
        </table>
            <br />
                    <asp:Button ID="BtnUp" runat="server" onclick="BtnUp_Click" Text="上一页" />
                    <asp:Button ID="BtnDown" runat="server" onclick="BtnDown_Click" Text="下一页" />
                    跳到第<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>页
                    <asp:Button ID="Button2" runat="server" Text="GO" OnClick="Button2_Click"/>
                    共<asp:Label ID="Num_Count" runat="server" Text="Label"></asp:Label>页----当前第<asp:Label ID="num" runat="server"></asp:Label>页
            </asp:Panel>

以上是页面

下面是后台代码

protected void Page_Load(object sender, EventArgs e)
        {
            BasePage_Load(new object(), new EventArgs());
            if (!IsPostBack)
            {
                num.Text = "1";
                Data_Bind();
            }
        }
        private void Data_Bind()
        {
            string sqlstr = " 1=1 ";
            if (TextBox1.Text.Trim() != "")
            {
                sqlstr += " and name like '%" + TextBox1.Text + "%'";
            }

            DataSet ds = new DataSet();
            ds = tb_bank.GetList(sqlstr);

            PagedDataSource pds = new PagedDataSource();
            pds.DataSource = ds.Tables[0].DefaultView;
            pds.AllowPaging = true;//允许分页
            pds.PageSize = 20;//单页显示项数
            int i = ds.Tables[0].Rows.Count / pds.PageSize;
            if (i * pds.PageSize < ds.Tables[0].Rows.Count)
            {
                Num_Count.Text = (ds.Tables[0].Rows.Count / pds.PageSize + 1).ToString();
            }
            else
            {
                Num_Count.Text = (ds.Tables[0].Rows.Count / pds.PageSize).ToString();
            }
            int curpage = Convert.ToInt32(num.Text);
            this.BtnDown.Enabled = true;
            this.BtnUp.Enabled = true;
            pds.CurrentPageIndex = curpage - 1;
            if (curpage == 1)
            {
                this.BtnUp.Enabled = false;
            }
            if (curpage == pds.PageCount)
            {
                this.BtnDown.Enabled = false;
            }

            list.DataSource = pds;
            list.DataBind();
        }

        public string Set_jinyong(string id, string is_rec)
        {
            DataSet ds = new DataSet();
            ds = tb_bank.GetList("id=" + id + "");
            if (is_rec == "1")
            {
                return "已停用";
            }
            else
            {
                return "已启用";
            }
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            Data_Bind();
        }

        protected void BtnUp_Click(object sender, EventArgs e)
        {
            this.num.Text = Convert.ToString(Convert.ToInt32(num.Text) - 1);
            Data_Bind();
        }

        protected void BtnDown_Click(object sender, EventArgs e)
        {
            this.num.Text = Convert.ToString(Convert.ToInt32(num.Text) + 1);
            Data_Bind();
        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            int result = -1;   //result 定义为out 用来输出值
            try
            {
                result = Convert.ToInt32(TextBox3.Text);
                if (int.Parse(Num_Count.Text) < int.Parse(TextBox3.Text) || int.Parse(TextBox3.Text) < 0)
                {
                    Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('请输入正确页码！')</script>");
                    return;
                }
                this.num.Text = TextBox3.Text;

            }
            catch
            {
                Page.ClientScript.RegisterStartupScript(this.GetType(), "", "<script>alert('请输入整数！')</script>");
                return;
            }
            Data_Bind();
        }