當ajax出錯時，自動跳轉到在web.cofing中設定的錯誤頁

aspx    <form id="form1" runat="server">
        <asp:ScriptManager ID="ScriptManager1" runat="server" AllowCustomErrorsRedirect="true">
        </asp:ScriptManager>

        <asp:UpdatePanel ID="UpdatePanel1" runat="server">
            <ContentTemplate>
                <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
            </ContentTemplate>
        </asp:UpdatePanel>
        

    </form>

cs    protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        throw new Exception();
    }

在web.config中<system.web>內加入<customErrors mode="On" defaultRedirect="~/Error.aspx"></customErrors>