javascript - Jquery 选择从 javascript 中设置选定值

Question

我正在使用 jquery chosen，我想从 javascript 中设置选定的值

Javascript/Jquery

$(document).ready(function() {
  var selectedUserRole = document.getElementById('SelectedUserRole').value;
  var str_array = selectedUserRole.split(',');

  for (var i = 0; i < str_array.length; i++) {
    // Trim the excess whitespace.
    str_array[i] = str_array[i].replace(/^\s*/, "").replace(/\s*$/, "");
    // Add additional code here, such as:

    $("UserRole").prop('selectedValue', str_array[i]); // Here not working
  }
});

HTML:

 @Html.DropDownList("UserRole", null, new { id = "UserRole", @class = "chosen-select", @multiple = "multiple", @placeholder = "Lütfen Rol Seçiniz", @style = "width: 250px;" })

str_array 的值如下

[5, 1, 7]

我想选择5个值，选择1个值，选择7个值

当我在下面尝试时

$("UserRole").prop('selectedValue', str_array[i]);

它对我不起作用。

Answer 1

设置select值后需要触发chosen:updated事件

$("#UserRole").val(str_array[i]).trigger("chosen:updated");

---

选择多个值

$(document).ready(function () {

    var selectedUserRole = document.getElementById('SelectedUserRole').value;

    var str_array = selectedUserRole.split(',');

    for (var i = 0; i < str_array.length; i++) {
        str_array[i] = str_array[i].replace(/^\s*/, "").replace(/\s*$/, "");
    }

    $("#UserRole").val(str_array).trigger("chosen:updated");
});

演示:Fiddle