如何找到检查单选直放站项目里面呢？ [英] How to find checked RadioButton inside Repeater Item?

问题描述

我有这样定义的ASPX页面上Repeater控件：

I have a Repeater control on ASPX-page defined like this:

<asp:Repeater ID="answerVariantRepeater" runat="server"
    onitemdatabound="answerVariantRepeater_ItemDataBound">
    <ItemTemplate>
        <asp:RadioButton ID="answerVariantRadioButton" runat="server"
            GroupName="answerVariants" 
            Text='<%# DataBinder.Eval(Container.DataItem, "Text")%>'"/>
    </ItemTemplate>
</asp:Repeater>

要允许只选择一个时间我用一招形式的这篇文章。

To allow select only one radio button in time I have used a trick form this article.

但现在提交表单时，我想，以确定哪个单选按钮被选中。

But now when form is submitted I want to determine which radio button is checked.

我可以这样做：

RadioButton checkedButton = null;

foreach (RepeaterItem item in answerVariantRepeater.Items)
{
    RadioButton control=(RadioButton)item.FindControl("answerVariantRadioButton");
    if (control.Checked)
    {
        checkedButton = control;
        break;
    }
}

但希望能以某种方式simplier做（也许通过LINQ的对象）。

but hope it could be done somehow simplier (maybe via LINQ to objects).

推荐答案

由于您使用JavaScript已经来处理客户端的单选按钮点击事件，你可以在同一时间选择的值更新的隐藏字段。

Since You are using javascript already to handle the radio button click event on the client, you could update a hidden field with the selected value at the same time.

您的服务器code随后将刚刚从隐藏字段访问选择的值。

Your server code would then just access the selected value from the hidden field.

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