ajax2.0问题

Question

不要放在同一个UpdatePanel里面，因为，如果你做刷新的时候，它是整个UpdatePanel刷新的，那么你其它的dropdownlist也会刷新的吧。

Answer 1

为什么要把所有的dropdownlist放到一个updatepanel里面？

Answer 2

一个updatepanel可以对应一个trigger。
如果你有两个dropdownlist
要求联动，只要把第二个放到updatepanel里面，trigger设置为第一个updatepanel即可

Answer 3

放在不同的updatepanel，其中一个刷新，其他panel也会刷新的

Answer 4

Updatepanel有2个属性  UpdateMode="Conditional" ChildrenAsTriggers="true"
意思是由该updatepanel中的子控件触发该updatepanel的更新如果要触发更新的控件不在updatepanel中则使用UpdateMode="Conditional" 
然后在updatepanel中添加子节点
<Triggers>
    <asp:AsyncPostBackTrigger ControlID="btnWorkloadAdd" />
    <asp:AsyncPostBackTrigger ControlID="btnWorkloadDele" />
</Triggers>
triggers表示触发updatepanel更新的控件集合

Answer 5

放在不同的updatepanel，其中一个刷新，其他panel也会刷新的
================================不会啊 我都是这样做的啊 没有刷新哦
你说刷新的是它会跳动吧？

Answer 6

放在不同的updatepanel，其中一个刷新，其他panel也会刷新的
--------------------------------------------------
UpdateMode="Conditional" 

Answer 7

 <form id="form1" runat="server" enctype="multipart/form-data">
     <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>     
    <div>
     <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">    
            <ContentTemplate>
                <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="true" Width="154px">
                  <asp:ListItem>1</asp:ListItem>
                    <asp:ListItem>2</asp:ListItem>
                    <asp:ListItem>3</asp:ListItem>
                    <asp:ListItem>4</asp:ListItem>
                </asp:DropDownList>
                <br />
                    <asp:DropDownList ID="DropDownList2" runat="server" AutoPostBack="true" Width="155px">
                    <asp:ListItem>1</asp:ListItem>
                    <asp:ListItem>2</asp:ListItem>
                    <asp:ListItem>3</asp:ListItem>
                    <asp:ListItem>4</asp:ListItem>
                </asp:DropDownList>
                                                            
            </ContentTemplate> 
            </asp:UpdatePanel>                         
              <asp:DropDownList ID="DropDownList3" runat="server" AutoPostBack="true" Width="156px">
               <asp:ListItem>1</asp:ListItem>
                    <asp:ListItem>2</asp:ListItem>
                    <asp:ListItem>3</asp:ListItem>
                    <asp:ListItem>4</asp:ListItem>
                </asp:DropDownList>      
    </div>    
    </form>
点downlist1的时候，downlist2不刷新

Answer 8

  <form   id="form1"   runat="server"   enctype="multipart/form-data"> 
          <asp:ScriptManager   ID="ScriptManager1"   runat="server"> 
                </asp:ScriptManager>           
        <div> 
          <asp:UpdatePanel   ID="UpdatePanel1"   runat="server"   UpdateMode="Conditional">         
                        <ContentTemplate> 
                                <asp:DropDownList   ID="DropDownList1"   runat="server"   AutoPostBack="true"   Width="154px"> 
                                    <asp:ListItem> 1 </asp:ListItem> 
                                        <asp:ListItem> 2 </asp:ListItem> 
                                        <asp:ListItem> 3 </asp:ListItem> 
                                        <asp:ListItem> 4 </asp:ListItem> 
                                </asp:DropDownList> 
                                <br   /> 
                                        <asp:DropDownList   ID="DropDownList2"   runat="server"   AutoPostBack="true"   Width="155px"> 
                                        <asp:ListItem> 1 </asp:ListItem> 
                                        <asp:ListItem> 2 </asp:ListItem> 
                                        <asp:ListItem> 3 </asp:ListItem> 
                                        <asp:ListItem> 4 </asp:ListItem> 
                                </asp:DropDownList> 
                                                                                                                        
                        </ContentTemplate>   
                        </asp:UpdatePanel>                                                   
                            <asp:DropDownList   ID="DropDownList3"   runat="server"   AutoPostBack="true"   Width="156px"> 
                              <asp:ListItem> 1 </asp:ListItem> 
                                        <asp:ListItem> 2 </asp:ListItem> 
                                        <asp:ListItem> 3 </asp:ListItem> 
                                        <asp:ListItem> 4 </asp:ListItem> 
                                </asp:DropDownList>             
        </div>         
        </form>

Answer 9

    <form id="form1" runat="server" enctype="multipart/form-data">
        <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
        <div>
            <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional" ChildrenAsTriggers="true">
                <ContentTemplate>
                    <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="true" Width="154px">
                        <asp:ListItem> 1 </asp:ListItem>
                        <asp:ListItem> 2 </asp:ListItem>
                        <asp:ListItem> 3 </asp:ListItem>
                        <asp:ListItem> 4 </asp:ListItem>
                    </asp:DropDownList>
                    <br />
                </ContentTemplate>
            </asp:UpdatePanel>
            <asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional"  ChildrenAsTriggers="true">
                <ContentTemplate>
                    <asp:DropDownList ID="DropDownList2" runat="server" AutoPostBack="true" Width="155px">
                        <asp:ListItem> 1 </asp:ListItem>
                        <asp:ListItem> 2 </asp:ListItem>
                        <asp:ListItem> 3 </asp:ListItem>
                        <asp:ListItem> 4 </asp:ListItem>
                    </asp:DropDownList>
                </ContentTemplate>
            </asp:UpdatePanel>
            <asp:DropDownList ID="DropDownList3" runat="server" AutoPostBack="true" Width="156px">
                <asp:ListItem> 1 </asp:ListItem>
                <asp:ListItem> 2 </asp:ListItem>
                <asp:ListItem> 3 </asp:ListItem>
                <asp:ListItem> 4 </asp:ListItem>
            </asp:DropDownList>
        </div>
    </form>

Answer 10

不要放到同一个UpdatePanel中 只把需要刷新的控件放到UpdatePanel中就好了 

Answer 11

<form   id="form1"   runat="server"   enctype="multipart/form-data"> 
                <asp:ScriptManager   ID="ScriptManager1"   runat="server"> 
                </asp:ScriptManager> 
                <div> 
                        <asp:UpdatePanel   ID="UpdatePanel1"   runat="server"   UpdateMode="Conditional"   ChildrenAsTriggers="true"> 
                                <ContentTemplate> 
                                        <asp:DropDownList   ID="DropDownList1"   runat="server"   AutoPostBack="true"   Width="154px"> 
                                                <asp:ListItem>   1   </asp:ListItem> 
                                                <asp:ListItem>   2   </asp:ListItem> 
                                                <asp:ListItem>   3   </asp:ListItem> 
                                                <asp:ListItem>   4   </asp:ListItem> 
                                        </asp:DropDownList> 
                                        <br   /> 
                                </ContentTemplate> 
                        </asp:UpdatePanel> 
                        <asp:UpdatePanel   ID="UpdatePanel2"   runat="server"   UpdateMode="Conditional"     ChildrenAsTriggers="true"> 
                                <ContentTemplate> 
                                        <asp:DropDownList   ID="DropDownList2"   runat="server"   AutoPostBack="true"   Width="155px"> 
                                                <asp:ListItem>   1   </asp:ListItem> 
                                                <asp:ListItem>   2   </asp:ListItem> 
                                                <asp:ListItem>   3   </asp:ListItem> 
                                                <asp:ListItem>   4   </asp:ListItem> 
                                        </asp:DropDownList> 
                                </ContentTemplate> 
                        </asp:UpdatePanel> 
                        <asp:DropDownList   ID="DropDownList3"   runat="server"   AutoPostBack="true"   Width="156px"> 
                                <asp:ListItem>   1   </asp:ListItem> 
                                <asp:ListItem>   2   </asp:ListItem> 
                                <asp:ListItem>   3   </asp:ListItem> 
                                <asp:ListItem>   4   </asp:ListItem> 
                        </asp:DropDownList> 
                </div> 
        </form>  
 
放不同的Panel
 

Answer 12

放在不同的updatepanel里面.设置更新模式就好!