关于ASP.NET AJAX的问题
我最近刚用.NET AJAX。   为什么局部刷新后还是会走页面.CS文件的page_Load事件？    ajax不是局部刷新吗？

代码：

<asp:UpdatePanel ID="UpdatePanel1" runat="server" ChildrenAsTriggers="true" UpdateMode="Always">

        <ContentTemplate>

        <div class="ResultGridView">   

            <asp:GridView runat="server" ID="GridView" style="width:100%; margin:1px;" Height="20" CellPadding="0"

                    CellSpacing="0" AutoGenerateColumns="false" OnRowDataBound="GridView_OnDataBound"

                PageSize="10" CssClass="ResultGridView"  >

                <Columns>

                    <asp:BoundField DataField = "seqID" />

                    <asp:BoundField DataField = "MachineGroup" HeaderText="机器组" />

                    <asp:BoundField DataField = "MachineName" HeaderText="机器名" />

                    <asp:BoundField DataField = "PartID" HeaderText="部材ID" />

                    <asp:BoundField DataField = "PartName" HeaderText="部材名" />

                </Columns>

                <HeaderStyle CssClass="GridView_HeaderStyle" />

                <RowStyle CssClass="GridView_RowStyle" />

            </asp:GridView>

        </div>

        <div runat="server" id="webPage1" style=" display:none">

            <cc1:WebPagingControl ID="WebPagingControl1" runat="server" TargetControlID="GridView" onpagedatabinding="WebPagingControl1_PageDataBinding">

            </cc1:WebPagingControl>

        </div>

        </ContentTemplate>

        </asp:UpdatePanel>