Question

我有一个简单的select2框，可以加载下拉菜单。

但是每次使用AJAX调用的结果打开选择菜单时，重新加载下拉菜单的最佳方法是什么？ ajax调用将返回

<option value=1>
<option value=2>

等等

我查看了select2文档中的AJAX示例，但它看起来有点过于复杂，无法满足我的需求。 TIA

Answer 1

假设你有html

   <p>
    Hidden field value set in the following format:
    <br />
    <em>'34:Donnie Darko,54:Heat,27:No Country for Old Men'
    </em></p>
<input type='hidden' id="e6" style="width: 500px;" value="34:Donnie Darko,54:Heat,27:No Country for Old Men"  />
<br /> <button id="save">Save</button>
<p>
After it's initialised, the hidden field value will change to:<br />
<em>'34,54,27'</em>
<br />
That is the value sent to the server
</p>

和select2 Ajax

function MultiAjaxAutoComplete(element, url) {
    $(element).select2({
        placeholder: "Search for a movie",
        minimumInputLength: 1,
        multiple: true,
        id: function(e) { return e.id+":"+e.title; },
        ajax: {
            url: url,
            dataType: 'json',
            data: function(term, page) {

                return {
                    q: term,
                    page_limit: 10,
                    apikey: "z4vbb4bjmgsb7dy33kvux3ea" //my own apikey
                };
            },
            results: function(data, page) {
                alert(data);
                return {
                    results: data.movies
                };
            }
        },
        formatResult: formatResult,
        formatSelection: formatSelection,
        initSelection: function(element, callback) {
            var data = [];
            $(element.val().split(",")).each(function(i) {
                var item = this.split(':');
                data.push({
                    id: item[0],
                    title: item[1]
                });
            });
            //$(element).val('');
            callback(data);
        }
    });
};

function formatResult(movie) {
    return '<div>' + movie.title + '</div>';
};

function formatSelection(data) {
    return data.title;
};



MultiAjaxAutoComplete('#e6', 'http://api.rottentomatoes.com/api/public/v1.0/movies.json');

$('#save').click(function() {
    alert($('#e6').val());
});

尝试使用此方法进行multiajax调用！请参阅 - http://jsfiddle.net/JpvDt/112/

Answer 2

试试这个：

    $(document).ready(function () {
        $('#Registration').select2({
            placeholder: 'Select a registration',
            allowClear: true,
            ajax: {
                quietMillis: 10,
                cache: false,
                dataType: 'json',
                type: 'GET',
                url: '@Url.Action("GetItems", "ItemsController")', //This asp.net mvc -> use your own URL
                data: function (registration, page) {
                    return {
                        page: page,
                        pageSize: 100,
                        registration: registration,
                        otherValue: $("#OtherValue").val() // If you have other select2 dropdowns you can get this value
                    };
                },
                results: function (data, page) {
                    var more = (page * pageSize) < data.total; // whether or not there are more results available
                    return { results: data.dataItems, more: more }; // notice we return the value of more so Select2 knows if more results can be loaded
                }
            },
            formatResult: FormatResult,
            formatSelection: FormatSelection,
            escapeMarkup: function (m) { return m; }
        });
    });

    function FormatResult(item) {
        var markup = "";
        if (item.name !== undefined) {
            markup += "<option value='" + item.id + "'>" + item.name + "</option>";
        }
        return markup;
    }

    function FormatSelection(item) {
        return item.name;
    }

Answer 3

请参阅Select2 webpage上的加载远程数据示例。

每次打开时，它都会使用ajax动态加载选择列表中的选项。

$("#e6").select2({
        placeholder: "Search for a movie",
        minimumInputLength: 1,
        ajax: { // instead of writing the function to execute the request we use Select2's convenient helper
            url: "http://api.rottentomatoes.com/api/public/v1.0/movies.json",
            dataType: 'jsonp',
            data: function (term, page) {
                return {
                    q: term, // search term
                    page_limit: 10,
                    apikey: "ju6z9mjyajq2djue3gbvv26t" // please do not use so this example keeps working
                };
            },
            results: function (data, page) { // parse the results into the format expected by Select2.
                // since we are using custom formatting functions we do not need to alter remote JSON data
                return {results: data.movies};
            }
        }
    });

Answer 4

如果您在默认情况下尝试使用预加载的JSON显示下拉列表，那么当您点击提交的那一刻，您希望下拉并显示已填充的数据，而无需键入单个字母，请设置 minimumInputLength：0 ，就像一个魅力。

它会触发JSON，就像你的任务是“使用select2在焦点上加载JSON”一样。

我添加了代码，但由于无法使用AJAX在代码段中远程检索JSON，因此无法使代码段工作。

请记住，这是您添加到代码中的解决方案，请勿使用下面列出的解决方案。我用它来描述修复。

  $(".myContainer").select2({
    ajax: {
      url: 'myJSONpath',
      dataType: 'json',
      delay: 250,
      data: function(params) {
       return {
         q: params.term, // search term
         page: params.page
       };
      },
     minimumInputLength: 0, // so here is a trick 0 will trigger ajax call right when you click on field
     processResults: function(data, params) {
       //process your results  
     },

....所以继续你的其他财产...

Answer 5

这将为您提供帮助

$(document).ready(function(){

 $("#selUser").select2({
  ajax: { 
   url: "getData.php",
   type: "post",
   dataType: 'json',
   delay: 250,
   data: function (params) {
    return {
      searchTerm: params.term // search term
    };
   },
   processResults: function (response) {
     return {
        results: response
     };
   },
   cache: true
  }
 });
});

Select2下拉列表如何通过AJAX加载结果

5 个答案: