easyui combobox 多选及全选功能（XTHS_实测可行）

代码如下：

$("#DepartmentCode").comboex({
    data: [{
        "value": "",
        "text": "全部"
    },
    {
        "value": "001",
        "text": "部门1"
    },
    {
        "value": "002",
        "text": "部门2"
    },
    {
        "value": "003",
        "text": "部门3"
    }],
    valueField: 'value',
    textField: 'text',
    panelHeight: 200,
    editable: false,
    multiple: true,
    formatter: function (row) { //formatter方法就是实现了在每个下拉选项前面增加checkbox框的方法
        var opts = $(this).combobox('options');
        return '<input type="checkbox" class="combobox-checkbox">' + row[opts.textField]
    },
    onLoadSuccess: function (record) {
        if (comboboxParams == null) {
            comboboxParams = PTLocalStorage.get(window.document.URL, false);
        }
        if (comboboxParams) {
            var tmpPara = comboboxParams.state;
            if (tmpPara && tmpPara != "") {
                $(this).combobox('setValue', tmpPara);
            }
        }
    },
    onClick: function (record) {
        var valueField = $(this).combobox("options").valueField;
        if (!record[valueField]) {
            var data = $(this).combobox("getData");
            var values = $(this).combobox("getValues");
            var selectVaues = [];
            if ((data.length - 1) != values.length) {
                data.reduce(function (prev, current, index, array) {
                    selectVaues.push(current[valueField]);
                }, selectVaues);
            } else {
                selectVaues.push(record[valueField]);
            }
            $(this).combobox('setValues', selectVaues);
        }
    },
    onSelect: function (row) { //选中一个选项时调用
        var opts = $(this).combobox('options');
        //设置选中值所对应的复选框为选中状态
        var el = opts.finder.getEl(this, row[opts.valueField]);
        el.find('input.combobox-checkbox')._propAttr('checked', true);
    },
    onUnselect: function (row) {//不选中一个选项时调用
        var opts = $(this).combobox('options');
        var el = opts.finder.getEl(this, row[opts.valueField]);
        el.find('input.combobox-checkbox')._propAttr('checked', false);
    }
});