BootStrap select2 动态改变值的方法

vartemp=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

                  vardata = [];

                  varvalue =""

                  varstr = $(element).val().split('^');

                  for(vari = 0; i < str.length; i++) {

                    vartemp = 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) {

                  returnitem.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) {

                  returnitem.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) {

                  returnm;

                }

              });

$("#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