BootStrap select2 动态改变值的方法

1,selec2动态赋值

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;
  }
});

2，动态改变值                                             

$("#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

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