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我遇到一个问题，json jquery 调用仅在页面加载后刷新页面时起作用。即在页面加载时不刷新数据，在刷新页面时刷新数据。它提供一个选择列表。我有以下 jquery ajax 设置：

$(document).ready(function() { 
    $.ajaxSetup({'async': false, 'cache':false});

以下是我的 json 声明：

    $.getJSON('ajax.cfm?action=refresh_bsu&site='+site+'&BaseLineYear='+BaselineYear+'&item=EnergyData', function(EnergyData) {
        SiteEnergyData = EnergyData; //Make it a global variable        
    });

这是完整的功能：

function GetEnergyData(){
    var site = $("#busUnitSubGroup").val();
    var BaselineYear = $("#BaselineYear").val();

    SiteEnergyData = "";

    $.getJSON('ajax.cfm?action=refresh_bsu&site='+site+'&BaseLineYear='+BaselineYear+'&item=EnergyData', function(EnergyData) {
        SiteEnergyData = EnergyData; //Make it a global variable        
    }); 
}

任何人都可以帮我解决这个问题吗？

谢谢JC

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2 回答 2

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I believe you might need define the function outside of doc ready, so that it is defined by the time the doc.ready event fires:

$(document).ready(function(){   

    GetEnergyData();          

    ...

});

function GetEnergyData(){
  ....
}

However, it seems like you should be getting some javascript errors if that is the problem. You should check the F12->console to see if there are any errors and what line it is saying the error is on.

于 2013-03-29T22:20:22.290 回答
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(a)SiteEnergyData在函数外部定义GetEnergyData()（因为您已经注意到它是一个全局变量）。如果没有，它将仅在该函数中可见。

(b) 你GetEnergyData()准备好在文档中的某个地方打电话了吗？我假设是这样，因为（出于某种原因）它适用于重新加载但不适用于初始加载。

$(document).ready(function(){

    var SiteEnergyData = "";  // (a) global variable... well, within doc ready
    GetEnergyData();          // (b) calls function once page is loaded

    ...

    function GetEnergyData(){
        ....
    }
});
于 2013-03-28T23:03:49.167 回答