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选择2个多个初始预选选项

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我正在努力让select2使用多个预先选择的选项 . 我正在使用它让用户选择几个选项，然后保存它们然后能够返回并编辑它们 . 但是我无法使select2 initSelection正常工作以填充用户已选择的现有选项 . 这里是我尝试使用的代码与警报，以显示什么时候已经发出警报（“完成”）;从来没有发射过警报（$（元素）.val（0）触发两次 . 一次是输入中的值，然后是空白 .

<input type="text" id="Commissioners" name="Commissioners" value="test" />

$("#Commissioners").select2({
                placeholder: 'Select Commissioners',
                minimumInputLength: 2,
                allowClear: true,
                multiple: true,
                width: 'resolve',
                ajax: {
                    url: "/Commissioner/CommissionerAutoComplete/",
                    dataType: 'json',
                    data: function (term, page) {
                        return {
                            search: term // search term
                        };
                    },
                    results: function (data) {
                        return { results: data };
                    }
                },
                initSelection: function (element, callback) {
                    // the input tag has a value attribute preloaded that points to a preselected make's id
                    // this function resolves that id attribute to an object that select2 can render
                    // using its formatResult renderer - that way the make text is shown preselected
                    alert($(element).val());
                    $.ajax({
                        url: "/UserProfile/LoadServiceTypeAndCommissioners",
                        type: "GET",
                        dataType: "json",
                        data: { UserId: '@Model.UserID', serviceTypeId: id}                            
                    }).done(function (data) {
                        alert("done");
                        callback(data.results);
                    });

                },
                formatResult: s2FormatResult,
                formatSelection: s2FormatSelection
            }).select2('val', []);



I figured out that the second alert fires for the .select2('val', []); at the end. however removing this causes the placeholder to not work and adding in a value here like ["1"] does not result in a selected item
javascript jquery jquery-select2

2 回答

  • 0

    事实证明，这是导致它不起作用的事物的组合 . 我没有将ajax调用中的代码作为json对象返回，但仅此一项并没有修复它 . 我必须在成功回调时向ajax调用添加成功和错误选项 . 奇怪的是，我仍然需要保持.done的回调 .

    $("#Commissioners").select2({
                placeholder: 'Select Commissioners',
                minimumInputLength: 2,
                allowClear: true,
                multiple: true,
                width: 'resolve',
                ajax: {
                    url: "/Commissioner/CommissionerAutoComplete/",
                    dataType: 'json',
                    data: function (term, page) {
                        return {
                            search: term // search term
                        };
                    },
                    results: function (data) {
                        return { results: data };
                    }
                },
                initSelection: function (element, callback) {
                    // the input tag has a value attribute preloaded that points to a preselected make's id
                    // this function resolves that id attribute to an object that select2 can render
                    // using its formatResult renderer - that way the make text is shown preselected
                    //alert($(element).val());
                    $.ajax({
                        url: "/UserProfile/LoadServiceTypeAndCommissioners",
                        type: "GET",
                        dataType: "json",
                        data: { UserId: '@Model.UserID', serviceTypeId: id },
                        success: function (data) {                                
                            callback(data);
                        },
                        error: function (data) {

                        }
                    }).done(function (data) {                            
                        callback(data.results);
                    });

                },
                formatResult: s2FormatResult,
                formatSelection: s2FormatSelection
            }).select2('val', ["1"]);
    回复于
  • 1

    这是我在这里看到的问题： $.ajax 调用需要时间来接收数据， select2 构造函数不等待 initSelection 设置 .

    尝试将ajax调用从select2初始化移到函数，并在select2初始化后立即调用它

    回复于

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