GridView 自定义分页--DropDownList翻页与保存状态问题

今天搞CMS的时候又遇到一个问题：由于新闻列表页面用的是GridView，觉得自带的分页不怎么样，就加入了DropDownList，感觉会人性化一些，但是，也出了问题！
艰难的为DropDownList动态绑定了值，但是，Change事件却不能翻页，而且不能保存状态，于是，百度，Google搜罗了一箩筐，问题还没解决，看来我真的很笨，这个问题都这么拗口.

先贴出部分源码，以后解决了再贴上解决方法.
页面部分：

<PagerTemplate>
                                                    <asp:LinkButton ID="FirstPage" runat="server" CommandArgument="First" ForeColor="AntiqueWhite" CommandName="Page" Enabled=" <%# ((GridView)Container.NamingContainer).PageIndex != 0%>">首页</asp:LinkButton>
                                                    <asp:LinkButton ID="PreviousPage" runat="server" CommandArgument="Prev" ForeColor="AntiqueWhite" CommandName="Page" Enabled=" <%# ((GridView)Container.NamingContainer).PageIndex != 0 %>">上一页</asp:LinkButton>
                                                    <asp:LinkButton ID="NextPage" runat="server" CommandArgument="Next" ForeColor="AntiqueWhite" CommandName="Page" Enabled=" <%# ((GridView)Container.NamingContainer).PageIndex != ((GridView)Container.NamingContainer).PageCount - 1 %>">下一页</asp:LinkButton>
                                                    <asp:LinkButton ID="LastPage" runat="server" CommandArgument="Last" ForeColor="AntiqueWhite" CommandName="Page" Enabled=" <%# ((GridView)Container.NamingContainer).PageIndex != ((GridView)Container.NamingContainer).PageCount - 1 %>">尾页</asp:LinkButton>
                                                    共 <font color="red"><%=RecordCount%></font> 条记录   当前第 <font color="red"><%#((GridView)Container.NamingContainer).PageIndex+1%></font> 页/共 <font color="red"><%#((GridView)Container.NamingContainer).PageCount %></font> 页    每页 <font color="red"><%#((GridView)Container.NamingContainer).PageSize %></font> 条记录   转到：
                                                    <asp:DropDownList runat="server" ID="ChangePage" AutoPostBack="true" OnSelectedIndexChanged="ChangePage_SelectedIndexChanged">
                                                    </asp:DropDownList>
                                                </PagerTemplate>

CS:

protected void GridView1_DataBound(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                if (this.GridView1.Rows.Count > 0)
                {
                    GridViewRow pagerRow = this.GridView1.BottomPagerRow;
                    DropDownList pageList = (DropDownList)pagerRow.Cells[0].FindControl("ChangePage");
                    for (int i = 1; i <= this.GridView1.PageCount; i++)
                    {
                        pageList.Items.Add(new ListItem("第" + i.ToString() + "页", i.ToString()));
                        //if ((this.GridView1.PageIndex + 1) == i)
                        //    pageList.SelectedIndex = i;
                    }
                    pageList.SelectedValue = Convert.ToString(this.GridView1.PageIndex);
                }
            }
        }

DropDownList事件：

protected void ChangePage_SelectedIndexChanged(object sender, EventArgs e)
        {

            GridViewRow pagerRow = this.GridView1.BottomPagerRow;
            DropDownList pageList = (DropDownList)pagerRow.Cells[0].FindControl("ChangePage");
            Session["NewsPage"] = pageList.SelectedValue;
            BindNewsWithClassID();
        }

 protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
2         {
3             this.GridView1.PageIndex = e.NewPageIndex;
4             BindNewsWithClassID();
5         }