在客户端设置CascadingDropDown的值 [英] Set CascadingDropDown's values on client side

问题描述

大家好，我有一个关于级联中的3个DropDownList的问题（与3个CascadingDropDown相关联。）

 <   asp：DropDownList     ID   =  List_1    runat   =  server    AppendDataBoundItems   =  true >  
 <   / asp：DropDownList  >  
 <   cc1：CascadingDropDown   
   
       ID   =  CDD_1  
   
         runat   =  server  
   
      类别  =  Costruttore  
   
       PromptText   =  Seleziona il Costruttore ......  
   
       ServiceMethod   =   GetCostruttoreAntenna  
   
       ServicePath  < span class =code-keyword> = 〜/ webServices / wsAjax.asmx  
   
       TargetControlID   =  Get_Costruttore  
   
       LoadingText   =  Caricamento costruttori ...  /  < span class =code-keyword>>  
 
 <   asp ：DropDownList     ID   =  List_2    runat   =  server    AppendDataBoundItems   =  true >  
 <   / asp：DropDownList  >  
 <   cc1：CascadingDropDown   
   
  < span class =code-attribute>     ID   =  CDD_2  
   
         runat   =  server < span class =code-attribute> 
   
      类别  =  Modello  
   
       PromptText   =  Seleziona il Modello ...  
   
       ServiceMethod   =  GetModelloAntenna  
   
       ServicePath   = 〜/ webServices / wsAjax.asmx  
   
       TargetControlID  < span class =code-keyword> =  List_2  
  < span class =code-attribute> 
       ParentControlID   =  List_1  
   
       LoadingText   =  Caricamento modelli。 ..    /  >  
 
 <   asp： DropDownList     ID   =  List_3    runat   =  server    AppendDataBoundItems   =  true >  
 <   / asp：DropDownList  >  
 <   cc1：CascadingDropDown   
   
       ID   =  CDD_3  
   
         runat   =  server  
   
      类别  = 模式   
   
       PromptText   =  Seleziona il Pattern ...  
   
       ServiceMethod   =  GetPattern  
   
       ServicePath   = 〜/ webServices / wsAjax.asmx  
   
       TargetControlID   =  List_3  
   
       ParentControlID   =  List_2  
   
       LoadingText   =  Caricamento pattern ...    /  >  

Everithing在服务器端工作正常，但我需要在客户端设置DropDownList的初始值。

 $（ ＃List_1）。val（Value_1 ）; 
 $（ ＃List_1）。change（）; 
 
 $（ ＃List_2）。val（Value_2）; 
 $（ ＃List_2）。change（）; 
 
 $（ ＃List_3）。val（Value_3）; 
 $（ ＃List_3）。change（）; 

根据这些说明，我只能设置第一个DropDownList的值，而不是其他2，因此保持为空并禁用。

是有可能（用Javascript）截取DropDownList完成加载的事件来设置初始值并触发DropDownList的下一个事件吗？



TIA。

Alder

解决方案

（ ＃List_1 ）。val（Value_1）;

（ ＃List_1 ）。change（）;

（ ＃List_2 ）VAL（_2）;

Hi all, I have a problem about 3 DropDownList in cascade (with 3 CascadingDropDown associated).

<asp:DropDownList ID="List_1" runat="server" AppendDataBoundItems="true">
</asp:DropDownList>
<cc1:CascadingDropDown

  ID="CDD_1"

   runat="server"

  Category="Costruttore"

  PromptText="Seleziona il Costruttore..."

  ServiceMethod="GetCostruttoreAntenna"

  ServicePath="~/webServices/wsAjax.asmx"

  TargetControlID="Get_Costruttore"

  LoadingText="Caricamento costruttori..."/>

<asp:DropDownList ID="List_2" runat="server" AppendDataBoundItems="true">
</asp:DropDownList>
<cc1:CascadingDropDown

  ID="CDD_2"

   runat="server"

  Category="Modello"

  PromptText="Seleziona il Modello..."

  ServiceMethod="GetModelloAntenna"

  ServicePath="~/webServices/wsAjax.asmx"

  TargetControlID="List_2"

  ParentControlID="List_1"

  LoadingText="Caricamento modelli..." />

<asp:DropDownList ID="List_3" runat="server" AppendDataBoundItems="true">
</asp:DropDownList>
<cc1:CascadingDropDown

  ID="CDD_3"

   runat="server"

  Category="Pattern"

  PromptText="Seleziona il Pattern..."

  ServiceMethod="GetPattern"

  ServicePath="~/webServices/wsAjax.asmx"

  TargetControlID="List_3"

  ParentControlID="List_2"

  LoadingText="Caricamento pattern..." />

Everithing works fine on server side but I need to set DropDownList's initial values on client side.

$("#List_1").val(Value_1);
$("#List_1").change();

$("#List_2").val(Value_2);
$("#List_2").change();

$("#List_3").val(Value_3);
$("#List_3").change();

With these instructions I can only set the first DropDownList's value, not the other 2, which therefore remain empty and disabled.
Is it possible (with Javascript) to intercept the DropDownList completed loading's event to set the initial value and trigger the next event of the DropDownList?

TIA.
Alder

解决方案

("#List_1").val(Value_1);

("#List_1").change();

("#List_2").val(Value_2);

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