为什么整个页面都回传和单选失去了它的价值呢？ [英] Why does the whole page do postback and RadioButton loses its value?

问题描述

我想从一个单选按钮选择运行一个查询来填充一个DropDownList。我不想整个页面做了回发。我的整个页面回发。

此外，当我这个页面复制到一个测试页面，单选按钮的值丢失。我需要的单选按钮来驱动他们查询哪些填充下拉列表。

我是什么做错了，这是造成一个完整的回发？

（该方法 FillAppointmentTypes_SelectedIndexChanged 永远不会执行。）

 ＆LT; ASP：的ScriptManager ID =ScriptManager1=服务器＆GT;
＆LT; / ASP：ScriptManager的＆GT;
＆LT; ASP：的UpdatePanel ID =updatePanelToggle=服务器＆GT;  ＆LT;＆的ContentTemplate GT;
    ＆LT; D​​IV CLASS =表单组＆GT;
      ＆LT;标签=radDoctors级=COL-MD-3控制标签＆GT;
        选择你的医生：LT;跨度ID =ASDF＆GT;＆LT; / SPAN＆GT;
      ＆LT; /标签＆gt;
      ＆LT; D​​IV CLASS =COL-MD-9＆GT;
        ＆LT; ASP：RadioButtonList的ID =radDoctors=服务器的CssClass =
          OnSelectedIndexChanged =FillAppointmentTypes_SelectedIndexChanged
          的AutoPostBack =真＆GT;
        ＆LT; / ASP：RadioButtonList的＆GT;
      ＆LT; / DIV＆GT;
    ＆LT; / DIV＆GT;
    ＆LT; D​​IV CLASS =表单组＆GT;
      ＆LT;标签=ddAppointmentTypes级=COL-MD-3控制标签＆GT;
        原因访问：LT;跨度ID =Span1＆GT;＆LT; / SPAN＆GT;
      ＆LT; /标签＆gt;
      ＆LT; D​​IV CLASS =COL-MD-9＆GT;
        ＆LT; ASP：DropDownList的ID =ddAppointmentTypes=服务器＆GT;
        ＆LT; / ASP：DropDownList的＆GT;
      ＆LT; / DIV＆GT;
    ＆LT; / DIV＆GT;
  ＆LT; /＆的ContentTemplate GT;
＆LT; / ASP：的UpdatePanel＆GT;
 

我曾尝试updatedatePanel内容模板内部和外部触发器，没有爱情：

 ＆LT;＆触发器GT;
  ＆LT; ASP：AsyncPostBackTrigger控件ID =radDoctors事件名称=的SelectedIndexChanged/＆GT;
＆LT; /触发器＆GT;
 

解决方案

把...

 如果（page.ispostback）
{
返回;
}
 

在你的页面加载事件的顶部。

希望这有助于

另外也许设置ChildAsTrigger =真上的UpdatePanel

I want a selection from a radio button to run a query to populate a DropDownList. I do not want the whole page to do a postback. My whole page is posting back.

Also, when I copy this page to a test page, the value of the radio button is lost. I need the radio button to drive they query which populates the dropdown.

What am I doing wrong which is causing a full postback?

(The method "FillAppointmentTypes_SelectedIndexChanged" is never executed.)

<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>


<asp:UpdatePanel ID="updatePanelToggle" runat="server">

  <ContentTemplate>
    <div class="form-group">
      <label for="radDoctors" class="col-md-3 control-label">
        Choose your doctor: <span id="asdf"></span>
      </label>
      <div class="col-md-9">
        <asp:RadioButtonList ID="radDoctors" runat="server" CssClass="" 
          OnSelectedIndexChanged="FillAppointmentTypes_SelectedIndexChanged"
          AutoPostBack="True">
        </asp:RadioButtonList>
      </div>
    </div>
    <div class="form-group">
      <label for="ddAppointmentTypes" class="col-md-3 control-label">
        Reason for Visit: <span id="Span1"></span>
      </label>
      <div class="col-md-9">
        <asp:DropDownList ID="ddAppointmentTypes" runat="server">
        </asp:DropDownList>
      </div>
    </div>
  </ContentTemplate>
</asp:UpdatePanel>

I have tried a trigger inside the updatedatePanel and outside the content template, no love:

<Triggers>
  <asp:AsyncPostBackTrigger ControlID="radDoctors" EventName="SelectedIndexChanged" />
</Triggers>

解决方案

Put...

if(page.ispostback) 
{
return;
}

At the top of your page load event..

Hope this helps

Also maybe set the ChildAsTrigger="true" on the updatepanel

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