[置顶] GridView分页（第一页、上一页、下一页、最后页、当前页数/总页数）

 前台GridView页脚代码：
<PagerTemplate>
                                                                    <table width="100%">
                                                                        <tr>
                                                                            <td width="75%">
                                                                                <asp:ImageButton ID="imgBtnFirst" runat="server" CommandArgument="First" CommandName="Page"
                                                                                    ImageUrl="~/Images/First.gif" ToolTip="第一页" />
                                                                                <asp:ImageButton ID="imgBtnPrev" runat="server" CommandArgument="Prev" CommandName="Page"
                                                                                    ImageUrl="~/Images/Previous.gif" ToolTip="上一页" />
                                                                                <asp:ImageButton ID="imgBtnNext" runat="server" CommandArgument="Next" CommandName="Page"
                                                                                    ImageUrl="~/Images/Next.gif" ToolTip="下一页" />
                                                                                <asp:ImageButton ID="imgBtnLast" runat="server" CommandArgument="Last" CommandName="Page"
                                                                                    ImageUrl="~/Images/Last.gif" ToolTip="最后页" />
                                                                            </td>
                                                                            <td align="right" width="25%">
                                                                                页数：<asp:Label ID="lblCurrentPage" runat="server"></asp:Label>
                                                                            </td>
                                                                        </tr>
                                                                    </table>
                                                                </PagerTemplate> 后台绑定事件：
    protected void GridView1_DataBound(object sender, EventArgs e)
    {
        // 取得显示页数的那一列。
        GridViewRow pagerRow = GridView1.BottomPagerRow;
        if (pagerRow != null)
        {
            // 取得显示目前所在页数的 Label 控件。
            Label pageLabel = (Label)(pagerRow.Cells[0].FindControl("lblCurrentPage"));

            // 取得 第一页、上一页、下一页、最后页 的按钮。
            ImageButton imgBtnFirst =
              (ImageButton)(pagerRow.Cells[0].FindControl("imgBtnFirst"));
            ImageButton imgBtnPrev =
              (ImageButton)(pagerRow.Cells[0].FindControl("imgBtnPrev"));
            ImageButton imgBtnNext =
              (ImageButton)(pagerRow.Cells[0].FindControl("imgBtnNext"));
            ImageButton imgBtnLast =
              (ImageButton)(pagerRow.Cells[0].FindControl("imgBtnLast"));

            // 设定何时应该显示 第一页、上一页、下一页、最后页 的按钮。
            if (GridView1.PageIndex == 0)
            {
                imgBtnFirst.Style.Add(HtmlTextWriterStyle.Visibility, "hidden");
                imgBtnPrev.Style.Add(HtmlTextWriterStyle.Visibility, "hidden");
            }
            else if (GridView1.PageIndex == GridView1.PageCount - 1)
            {
                imgBtnLast.Style.Add(HtmlTextWriterStyle.Visibility, "hidden");
                imgBtnNext.Style.Add(HtmlTextWriterStyle.Visibility, "hidden");
            }
            else if (GridView1.PageCount <= 0)
            {
                imgBtnFirst.Style.Add(HtmlTextWriterStyle.Visibility, "hidden");
                imgBtnPrev.Style.Add(HtmlTextWriterStyle.Visibility, "hidden");
                imgBtnNext.Style.Add(HtmlTextWriterStyle.Visibility, "hidden");
                imgBtnLast.Style.Add(HtmlTextWriterStyle.Visibility, "hidden");
            }

            if (pageLabel != null)
            {
                // 计算目前所在的页数。
                int currentPage = GridView1.PageIndex + 1;

                pageLabel.Text = currentPage.ToString() +
                    " / " + GridView1.PageCount.ToString();
            }
        }
    }
    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridView1.PageIndex = e.NewPageIndex;
        bind_gv();
    }