$('#countryID').select2( { placeholder: "请选择国家", ajax: { dataType: 'json', type: 'POST', delay: 500, data: function (params) { return { SearchKey: params.term //params.term 搜索参数值 }; }, transport: async function (params, success, failure) { //这个params和上个params是不太一样，建议 console.log(params) if (typeof (params.data.SearchKey) == "undefined") { //刚聚焦是参数值是undefined的 var data = await vm.searchCountries({}); //data是返回的绑定数据，json数组 [{"ComapnyDistrictCode":[],"ParentID":"0","Name":"阿富汗伊斯兰国"},{...}] if (data && data.length > 0) { success(data); //插件自带的回调success函数， } else { failure(); } } else if (params.data.SearchKey.length >= 2) { //如果输入的参数值大于等于2，去搜索数据 var data = await vm.searchCountries(params.data); if (data && data.length > 0) { success(data); } else { failure(); } } }, processResults: function (data, page) { var arr = []; data.map(x => arr.push({ id: x.ID, text: x.NameEn + '(' + x.Name + ')' })); //整理绑定格式 ， 放到arr里 return { results: arr, more: false }; }, cache: true }, escapeMarkup: function (markup) { return markup; }, // let our custom formatter work // minimumInputLength: 2, //至少输入多少个字符后才会去调用ajax // maximumInputLength: 20, //最多能输入多少个字符后才会去调用ajax // minimumResultsForSearch: 1, // width: "260px", templateResult: function (data) { if (data.loading) return data.text; return "<div>" + data.text + "</div>"; }, templateSelection: function (data) { return data.text; } }).on('change', function () { //onchange函数回调 // 这里呼叫回调并传入现在选取的 value vm.customFrom.Country = this.value; vm.customFrom.CountryIndex = this.selectedIndex; this.isInitSelect = true; }); } }, searchCountries(params) { //异步请求数据 return new Promise(function (resolve, reject) { $fn.post($api.getCountries, params, ret => { if (ret.ErrorCode == 1 && ret.Data) { resolve(ret.Data); } else { resolve([]); } }); });
