Question

我正在寻找一种方法，将var selectedId = []中的.change(function{})值传递给全局var globalId = []。因此，每次selectedId中的值发生变化时，我都希望使用selectedId.update(globalId)或selectedId = globalId.update()这样的函数来更新全局ID，但我不知道如何写这部分。最后，我可以在其他更改功能中使用最新的globalId。这是我的代码

$(function(){
    var globalId = [];

    $("#listbox1").change(function(){
        var selectedId =[];
        //get each selection
        $.each(selectedId , function (fIndex, fValue) {
            $.each(this.options, function (value, option) {
                if (this.selected) {
                    selectedId.push(option.value);
                }
            });
        });
        // send value to globalId 
        selectedId = globalId; // how to keep globalId up-to-date 
        // for everytime selectedId changes
        $.ajax({
            //....
            traditional: true, 
            data:{"// id in the controller": selectedId},
            success{...},
            error{...}
        });//end ajax

    });//end listbox1 change

    $("#listbox2").change(function(){
        var selectedId2 = [];
        // same each function to get selected <option>s as listbox1
        $.each{...
            $each{...
            };
        };
        $.ajax({
            //...
            data:{
                "//id1 in the controller": selectedId2, 
                "//id2 in the controller": globalId 
            },// this is the reason why I want to pass those values from listbox1  
            //to globalId so that I can use these two arrays in my controller function
            success{...},  
            error{}              
        });
    })//end listbox2 change
});//end ready

如果有人有想法解决这个问题，我将深表感谢。

谢谢！

凯文

Answer 1

你可以这样做。

function GlobalIds(){
   var globalIds;
   return{
     getGlobalIds: function(){ return globalIds;},
     setGlobalIds: function(ids){ globalIds = ids}
    }
}

var globalIds = new GlobalIds();
globalIds.setGlobalIds([1,2]);
console.log(globalIds.getGlobalIds());
globalIds.setGlobalIds([3,4]);
console.log(globalIds.getGlobalIds());

此外，您似乎已经以错误的方式完成了任务。而不是

// send value to globalId 
          selectedId = globalId; // how to keep globalId up-to-date 
                                // for everytime selectedId changes

应该是

 globalId = selectedId;

将.change函数中的变量传递并更新为全局变量Jquery

1 个答案: