一旦标签都具有值，就动态地对标签的值求和

Question

我有一系列 asp Radiobuttons 可以很好地填充标签的值，但现在使用 jQuery 检查，如果所有标签都有值，那么我想对这些值进行动态求和. 使用 clsTxtToCalculate class 或引用标签值，code/function 会实现此目的吗？

<tr>
  <td>
    <asp:Label ID="lblScore1" CssClass="center clsTxtToCalculate" clientidmode="Static" runat="server" AutoCompleteType="None" />
  </td>
  <td>
    <asp:Label ID="lblScore2" CssClass="center clsTxtToCalculate" clientidmode="Static" runat="server" AutoCompleteType="None" />
  </td>
  <td>
    <asp:Label ID="lblScore3" CssClass="center clsTxtToCalculate" clientidmode="Static" runat="server" AutoCompleteType="None" />
  </td>
  <td>
    <asp:Label ID="lblScore4" CssClass="center clsTxtToCalculate" clientidmode="Static" runat="server" AutoCompleteType="None" />
  </td>
</tr>

Answer 1

您可以遍历标签并对值求和：

function notify() {
  var labels = $(".clsTxtToCalculate");
  var total = 0; 
  $.each(labels, function(index,lbl){
    total += parseInt($(lbl).text());
  });
  alert(total)
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<table>
  <tr>
    <td>
      <Label ID="lblScore1" class="center clsTxtToCalculate">10</label>
    </td>
    <td>
      <Label ID="lblScore2" class="center clsTxtToCalculate">20</label>
    </td>
    <td>
      <Label ID="lblScore3" class="center clsTxtToCalculate">30</label>
    </td>
    <td>
      <Label ID="lblScore4" class="center clsTxtToCalculate">40</label>
    </td>
  </tr>
</table>
<button onclick="notify()">Calculate</button>

Answer 2

在你的收音机更改事件中（我猜你有其中之一来填充标签），你可以在填充标签文本后做这样的事情：

var labels = $('.clsTxtToCalculate'),
    labelsWithText = labels.filter(function() {
      return $(this).text() != '';
    });

if (labels.length == labelsWithText.length) {
  // do calculation here
}

一旦标签都具有值，就动态地对标签的值求和

Dynamically sum the values of labels once they all have values

javascript

asp.net

jquery

aspx-user-control