asp.net ajax 技巧5

  继续章立民asp.net ajax 168范例的读书笔记
1） 比如有两个updatepannel1和updatepannel2,如果要在updatepannel1中点按钮，去更新updatepannel2中的内容，但updatepanel1中的内容不变，其主要设置好各updatepannel的childrenastriggers属性为false，以及updatemode属性为conditional即可
  <form id="form1" runat="server">
        <div>
            <asp:ScriptManager ID="ScriptManager1" runat="server">
            </asp:ScriptManager>
        </div>
        <table border="1" style="width: 440px">
            <tr>
                <td valign="top" style="width: 100px; height: 13px">
                    <asp:Panel ID="Panel1" runat="server" Height="120px" Width="320px" GroupingText="UpdatePanel1">
                        <asp:UpdatePanel ID="UpdatePanel1" runat="server" ChildrenAsTriggers="False" UpdateMode="Conditional">
                            <ContentTemplate>
                                <br />
                                <asp:Button ID="Button1" runat="server" Text="异步局部更新 UpdatePanel2" />
                                <br />
                                <%=DateTime.Now.ToString()%>
                            </ContentTemplate>
                            <Triggers>
                                <asp:AsyncPostBackTrigger ControlID="Button2" EventName="Click" />
                            </Triggers>
                        </asp:UpdatePanel>
                        <br />
                    </asp:Panel>
                </td>
                <td valign="top" style="width: 100px; height: 13px">
                    <asp:Panel ID="Panel2" runat="server" Height="176px" Width="320px" GroupingText="UpdatePanel2">
                        <asp:UpdatePanel ID="UpdatePanel2" runat="server" ChildrenAsTriggers="False" UpdateMode="Conditional">
                            <ContentTemplate>
                                <br />
                                <asp:Button ID="Button2" runat="server" Text="异步局部更新 UpdatePanel1" />
                                <br />
                                <%=DateTime.Now.ToString()%>
                            </ContentTemplate>
                            <Triggers>
                                <asp:AsyncPostBackTrigger ControlID="Button1" EventName="Click" />
                            </Triggers>
                        </asp:UpdatePanel>
                        <br />
                    </asp:Panel>
                </td>
            </tr>
        </table>
    </form>

2 如果一个上传控件fileupload放在updatepannel中，由于其不兼容updatepannel,所以必须在triggers属性中添加postbacktrigger触发器，以说明是引发全局更新