BootStrap select2 动态改变值的方法

var temp=JSON.stringify({ id: "1|所有停车场", name: "所有停车场" });$("#e_pid").attr("value", tempP);              $("#e_pid").select2({                placeholder: "查找停车场名称(多选)",                language: "zh-CN",                minimumInputLength: 1,                allowClear: true,                multiple: true,                ajax: {                  // instead of writing the function to execute the request we use Select2's convenient helper                  url: "/manage/park/index/json/index",                  dataType: 'json',                  data: function (term, page) {                    return {                      parkName: term,// search term                      powerpid: "1"                    };                  },                  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                    for (var i = 0; i < data.length; i++) {                      data[i].id = data[i].id+"|"+data[i].name;                    };                    data.push({ id: "577cb125f8d2c404572413d1|无", name: "无" });                    return {                      results: data                    };                  }                },                initSelection: function (element, callback) {//赋初始值                  // the input tag has a value attribute preloaded that points to a preselected movie's id                  // this function resolves that id attribute to an object that select2 can render                  // using its formatResult renderer - that way the movie name is shown preselected                  var data = [];                  var value = ""                  var str = $(element).val().split('^');                  for (var i = 0; i < str.length; i++) {                    var temp = JSON.parse(str[i]);                    value += temp.id + ",";                    data.push(temp);                  }                  ;                  value = value.substring(0, value.length - 1);                  $(element).val(value);                  callback(data);                },                formatSelection: function (item) {                  return item.name;//注意此处的name，要和ajax返回数组的键值一样                }, // 选择结果中的显示                formatResult: function (item) {                  return item.name;//注意此处的name                },// 搜索列表中的显示                dropdownCssClass: "bigdrop", // apply css that makes the dropdown taller                escapeMarkup: function (m) {                  return m;                }              });

$("#e_pid").attr("value", temp);                          $("#e_pid").trigger('change'); //动态改变值以后必须触发改变时间。否则将不会生效