.no-search .select2-search {
    display:none
}

$("#test").select2({
    dropdownCssClass : 'no-search'
}); 

你可以为minimumResultsForSearch选项设置无穷大或-1

解决方案1

裁判:https://select2.org/searching # limiting-display-of-the-search-box-to-large-result-sets

$('select').select2({
    minimumResultsForSearch: -1
});

解决方案2

裁判:https://select2.org/searching # hiding-the-search-box

$('select').select2({
   minimumResultsForSearch: Infinity
});

如果你想隐藏在初始打开，你正在通过ajax调用填充下拉列表，在你的select2声明的ajax块中添加以下内容:

beforeSend: function () 
  {
    $('.select2-search--dropdown').addClass('hidden');
  }

然后在ajax请求成功后再次显示它(并聚焦):

  success: function() {
      $('.select2-search--dropdown').removeClass('select2-search--hide'); // show search bar then focus
      $('.select2-search__field')[0].focus();
  }

$(document).ready(function() { $(".select2").select2(); }); <link href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/css/select2.min.css" rel="stylesheet" /> <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/js/select2.min.js"></script> <label>without search box</label> <select class="select2" data-width="100%" data-minimum-results-for-search="Infinity"> <option>one</option> <option>two</option> </select> <label>with search box</label> <select class="select2" data-width="100%"> <option>one</option> <option>two</option> </select>

如果选择显示结果，必须使用这个:

$('#yourSelect2ControlId').select2("close").parent().hide();

它关闭搜索结果框，然后设置控件不可见

对于多选你必须写js代码，没有设置属性。

$('#js-example-basic-hide-search-multi').select2();

$('#js-example-basic-hide-search-multi').on('select2:opening select2:closing', function( event ) {
    var $searchfield = $(this).parent().find('.select2-search__field');
    $searchfield.prop('disabled', true);
});

这一点在他们的页面上提到了:https://select2.org/searching#multi-select