@Html.RadioButtonFor(m => m.FALL_HISTORY, "N", new { @id = "Fall_HistoryN", @name = "FALL_HISTORY", data_value = "0" })0-無
 
  @Html.RadioButtonFor(m => m.FALL_HISTORY, "Y", new { @id = "Fall_HistoryY", @name = "FALL_HISTORY", data_value = "25" })25-有

這是我兩個按鈕，點選可以取得datavalue的值

可是我卻取不到

開F12是有看到的

<input data-val="true" data-val-required="請點選" data-value="0" id="Fall_HistoryN" name="FALL_HISTORY" type="radio" value="N">

<input data-value="25" id="Fall_HistoryY" name="FALL_HISTORY" type="radio" value="Y">

這是我取值的JQUERY

$(function () {
     calculateScore();
}
 function getValue(str) {
        if (isNaN(str)) return 0;
        else return parseInt(str, 10);
    }
function calculateScore() {
  var s1 = getValue($('input[name="FALL_HISTORY"]:checked').attr('data-value'));
}

  alert(s1)

這是測試用網頁
http://jsfiddle.net/62h91zeb/