20150410---GridView分页（备忘）

GridView自带分页功能，但是模板单一，试用较少数据。

AllowPaging="true"

PageSize="10"

启用分页设置。默认每页数量为10

添加分页触发事件：
OnPageIndexChanging="GridView1_PageIndexChanging"

<PagerTemplate>
    当前第:
<%--((GridView)Container.NamingContainer)就是为了得到当前的控件--%>
    <asp:Label ID="LabelCurrentPage" runat="server" Text="<%# ((GridView)Container.NamingContainer).PageIndex + 1 %>"></asp:Label>
    页/共:
<%-- //得到分页页面的总数--%>
    <asp:Label ID="LabelPageCount" runat="server" Text="<%# ((GridView)Container.NamingContainer).PageCount %>"></asp:Label>
    页
<%--//如果该分页是首分页，那么该连接就不会显示了.同时对应了自带识别的命令参数CommandArgument--%>
    <asp:LinkButton ID="LinkButtonFirstPage" runat="server" CommandArgument="First"

     CommandName="Page" Visible='<%#((GridView)Container.NamingContainer).PageIndex != 0 %>'>首页</asp:LinkButton>
    <asp:LinkButton ID="LinkButtonPreviousPage" runat="server" CommandArgument="Prev"
     CommandName="Page" Visible='<%# ((GridView)Container.NamingContainer).PageIndex != 0 %>'>上一页</asp:LinkButton>
<%-- //如果该分页是尾页，那么该连接就不会显示了--%>
    <asp:LinkButton ID="LinkButtonNextPage" runat="server" CommandArgument="Next" CommandName="Page"
     Visible='<%# ((GridView)Container.NamingContainer).PageIndex != ((GridView)Container.NamingContainer).PageCount - 1 %>'>下一页</asp:LinkButton>
    <asp:LinkButton ID="LinkButtonLastPage" runat="server" CommandArgument="Last" CommandName="Page"
     Visible='<%# ((GridView)Container.NamingContainer).PageIndex != ((GridView)Container.NamingContainer).PageCount - 1 %>'>尾页</asp:LinkButton>
    转到第

<asp:TextBox ID="txtNewPageIndex" runat="server" Width="20px" Text='<%# ((GridView)Container.Parent.Parent).PageIndex + 1 %>' BorderStyle="None" />页
<%--//这里将CommandArgument即使点击该按钮e.newIndex 值为3--%>
    <asp:LinkButton ID="btnGo" runat="server" CausesValidation="False" CommandArgument="-3" CommandName="Page" Text="GO"/>

</PagerTemplate>

下面是添加分页触发事件（C#后台代码）：
GridView1_PageIndexChanging

protected void GridView2_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        // 得到该控件
        GridView theGrid = sender as GridView;
        int newPageIndex = 0;
        if (e.NewPageIndex == -3)//点击了Go按钮
        {
            TextBox txtNewPageIndex = null;

            //GridView较DataGrid提供了更多的API，获取分页块可以使用BottomPagerRow 或者TopPagerRow，当然还增加了HeaderRow和FooterRow
            GridViewRow pagerRow = theGrid.BottomPagerRow;

            if (pagerRow != null)
            {
                //得到text控件
                txtNewPageIndex = pagerRow.FindControl("txtNewPageIndex") as TextBox;
            }
            if (txtNewPageIndex != null)
            {
                //得到索引
                newPageIndex = int.Parse(txtNewPageIndex.Text) - 1;
            }
        }
        else //点击了其他的按钮
        {
            newPageIndex = e.NewPageIndex;
        }
        //防止新索引溢出
        newPageIndex = newPageIndex < 0 ? 0 : newPageIndex;
        newPageIndex = newPageIndex >= theGrid.PageCount ? theGrid.PageCount - 1 : newPageIndex;

        //得到新的值
        theGrid.PageIndex = newPageIndex;

        //重新绑定
        bind();
    }

最终分页样式：