[ASP.NET] 自定义GridView分页

1. aspx页面端代码：
<div class="gv-footer">
          <asp:LinkButton ID="btFirstPage" runat="server" CommandArgument="first" OnClick ="PagerButton_Click">首页</asp:LinkButton>
        <asp:LinkButton ID="btPrevPage" runat="server" CommandArgument="prev" OnClick ="PagerButton_Click">上一页</asp:LinkButton>
        <asp:LinkButton ID="btNextPage" runat="server" CommandArgument="next" OnClick ="PagerButton_Click">下一页</asp:LinkButton>
        <asp:LinkButton ID="btLastPage" runat="server" CommandArgument="last" OnClick ="PagerButton_Click">尾页</asp:LinkButton>
        页码：
        <asp:Label ID="lbCurrentPage" runat="server" ForeColor="Blue"></asp:Label>
        /
        <asp:Label ID="lbTotalPage" runat="server"></asp:Label>
        <asp:DropDownList ID="ddlPageSelect" runat="server" AutoPostBack="True" OnSelectedIndexChanged="ddlPageSelect_SelectedIndexChanged"> </asp:DropDownList>
      </div>
2. aspx.cs端代码：
#region GridView分页
   /// <summary>
   /// 页面选择操作
   /// </summary>
   /// <param name="sender"></param>
   /// <param name="e"></param>
   protected void PagerButton_Click(object sender, EventArgs e)
   {
       int pageIndex = gvSailingList.PageIndex;
       string arg = ((LinkButton)sender).CommandArgument.ToString().ToLower();
       switch (arg)
     &nb