单击 SelectAllOption 多选时未触发 onChange 事件

Question

我使用 bootstrap multiselect ，根据 selected 选项获取数据。此过滤器数据将在 onChange 触发时起作用，但在尝试 select 时所有 onChange 不起作用：

function getOptions(node, isFilter) {
    var isChanged = false;
    return {
        enableCaseInsensitiveFiltering: isFilter,
        includeSelectAllOption: true,
        filterPlaceholder: 'Search ...',
        nonSelectedText: node,
        numberDisplayed: 1,
        buttonWidth: '100%',
        maxHeight: 400,
        onChange: function () {
            alert('Changes');
            isChanged = true;
        },
        onDropdownHide: function (event) {
            if (isChanged) {
                filterData(node);
                isChanged = false;
            }

        }
    }
}
$('#myselect').multiselect(getOptions('myselect', true));

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-multiselect/0.9.13/js/bootstrap-multiselect.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-multiselect/0.9.13/css/bootstrap-multiselect.css" />
<!-- Build your select: -->
<select id="myselect" multiple="multiple">
    <option value="1">Option 1</option>
    <option value="2">Option 2</option>
    <option value="3">Option 3</option>
    <option value="4">Option 4</option>
    <option value="5">Option 5</option>
    <option value="6">Option 6</option>
</select>

Answer 1

Bootstrap multiselect 提供一个名为 "onSelectAll" 的函数。此函数将用于 select 所有选项。您需要将 onSelectAll 函数与 onChange 函数一起使用。

function getOptions(node, isFilter) {
var isChanged = false;
return {
    enableCaseInsensitiveFiltering: isFilter,
    includeSelectAllOption: true,
    filterPlaceholder: 'Search ...',
    nonSelectedText: node,
    numberDisplayed: 1,
    buttonWidth: '100%',
    maxHeight: 400,
    onChange: function () {
        isChanged = true;
    },
    onSelectAll: function() {
        isChanged = true;
    },
    onDropdownHide: function (event) {
        if (isChanged) {
            filterData(node);
            isChanged = false;
        }

    }
}
}
$('#DDLCity').multiselect(getOptions('City', true));

Answer 2

Bootstrap multiselect为此提供了事件，那就是onSelectAll。当您的 Select all 被选中时，您需要使用 onSelectAll。这是您的代码中缺少的一段代码：

onSelectAll: function() {
    alert("SELECT ALL");
    isChanged = true;
},

下面是您的代码的更新工作版本：

function getOptions(node, isFilter) {
  var isChanged = false;
  return {
    enableCaseInsensitiveFiltering: isFilter,
    includeSelectAllOption: true,
    filterPlaceholder: 'Search ...',
    nonSelectedText: node,
    numberDisplayed: 1,
    buttonWidth: '100%',
    maxHeight: 400,
    onChange: function() {
      alert('Changes');
      isChanged = true;
    },
    onSelectAll: function() {
      alert("SELECT ALL");
      isChanged = true;
    },
    onDropdownHide: function(event) {
      if (isChanged) {
        filterData(node);
        isChanged = false;
      }

    }
  }
}
$('#myselect').multiselect(getOptions('myselect', true));

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-multiselect/0.9.13/js/bootstrap-multiselect.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-multiselect/0.9.13/css/bootstrap-multiselect.css" />
<!-- Build your select: -->
<select id="myselect" multiple="multiple">
    <option value="1">Option 1</option>
    <option value="2">Option 2</option>
    <option value="3">Option 3</option>
    <option value="4">Option 4</option>
    <option value="5">Option 5</option>
    <option value="6">Option 6</option>
</select>

单击 SelectAllOption 多选时未触发 onChange 事件

onChange event not triggered when while clicking on SelectAllOption multiselect

javascript

jquery

bootstrap-multiselect