伊のspace～芳香精油＊美容保養＊程式設計

※只能適用於GirdView的換頁，如果是轉跳到不同url的頁面，則[上一頁]的history功能一樣失效。
實驗的結果，轉跳不同url也可成功"回上一頁"。
但如果GridView有做ajax篩選，則一樣會失敗。
目前解決辦法是，不要做ajax篩選，只有ajax換頁。

aspx File

<asp:ScriptManager ID="ScriptManager1" runat="server" EnableHistory="true">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
    <ContentTemplate>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" >
        </asp:SqlDataSource>
        <asp:GridView ID="GridView1" runat="server" AllowPaging="True" DataSourceID="SqlDataSource1">
        </asp:GridView>
    </ContentTemplate>
</asp:UpdatePanel>

vb File

Protected Sub GridView1_PageIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles GridView1.PageIndexChanged
    '換頁時把頁碼加入歷史紀錄
    If ScriptManager1.IsInAsyncPostBack And Not ScriptManager1.IsNavigating Then
        Dim index As Integer = GridView1.PageIndex
        ScriptManager1.AddHistoryPoint("PageIndex", index, "第 " & index + 1 & " 頁")
    End If
End Sub
Protected Sub ScriptManager1_Navigate(ByVal sender As Object, ByVal e As System.Web.UI.HistoryEventArgs) Handles ScriptManager1.Navigate
    '按上一頁會進到歷史紀錄的功能
    Dim indexString As String = e.State("PageIndex")
    Page.Title = "第 " & indexString & " 頁"
    GridView1.PageIndex = CType(indexString, Integer)
    GridView1.DataSourceID = SqlDataSource1.ID
End Sub