用户单击单选按钮时触发事件

Question

我需要根据用户在单选按钮上的选择来使某些控件可见或不可见，但我需要在用户单击后立即使这些控件可见或不可见单选按钮。

我尝试在ASP端添加OnSelectedIndexChanged，但它似乎没有做任何事情。单击其中一个单选按钮后，还有其他方法可以触发代码吗？

目前我有：

<asp:RadioButtonList ID="rblMeasurementSystem" runat="server" OnSelectedIndexChanged="rblMeasurementSystem_SelectedIndexChanged">
  <asp:ListItem Text="Leads" Value="1" />
  <asp:ListItem Text="Audit Thresholds" Value="2" />
  <asp:ListItem Text="Root Cause" Value="3" />
  <asp:ListItem Text="Pend Reasons" Value="4" />
  <asp:ListItem Text="AA Review" Value="5" />
</asp:RadioButtonList>

在代码隐藏中，我有：

protected void rblMeasurementSystem_SelectedIndexChanged(object sender, EventArgs e)
{
  string value = rblMeasurementSystem.SelectedItem.Value.ToString();
  if (value == "1")
    {
        lblLabel1.Visible = true;
        txtText1.Visible = true;
        lblLabel2.Visible = false;
        txtText2.Visible = false;
        lblLabel3.Visible = false;
        txtText3.Visible = false;
        lblLabel4.Visible = false;
        txtText4.Visible = false;
        lblLabel5.Visible = false;
        txtText5.Visible = false;
    }

  if (value == "2")
    {
        lblLabel1.Visible = false;
        txtText1.Visible = false;
        lblLabel2.Visible = true;
        txtText2.Visible = true;
        lblLabel3.Visible = false;
        txtText3.Visible = false;
        lblLabel4.Visible = false;
        txtText4.Visible = false;
        lblLabel5.Visible = false;
        txtText5.Visible = false;
    }

  if (value == "3")
    {
        lblLabel1.Visible = false;
        txtText1.Visible = false;
        lblLabel2.Visible = false;
        txtText2.Visible = false;
        lblLabel3.Visible = true;
        txtText3.Visible = true;
        lblLabel4.Visible = false;
        txtText4.Visible = false;
        lblLabel5.Visible = false;
        txtText5.Visible = false;
    }

    etc...

}

Answer 1

您的代码存在的问题是，代码永远不会回发到服务器（原因是像ASP RadioButton这样的控件，CheckBox控件会公开缓存事件，这意味着它们只会在实际回发时触发例如通过按钮发生）。只需将AutoPostBack属性设置为true即可强制回发： -

<asp:RadioButtonList ID="rblMeasurementSystem" runat="server" AutoPostBack="true" 
     OnSelectedIndexChanged="rblMeasurementSystem_SelectedIndexChanged">

此外，如果您只是根据单选按钮选择显示\隐藏一些控件，则应使用Javascript或jQuery在客户端执行此操作。