如何返回 AJAX 响应文本? [英] How to return AJAX response Text?

问题描述

我使用原型来做我的 AJAX 开发，我使用这样的代码:

I use prototype to do my AJAX development, and I use the code like this:

somefunction: function(){
    var result = "";
    myAjax = new Ajax.Request(postUrl, {
        method: 'post',
        postBody: postData,
        contentType: 'application/x-www-form-urlencoded',
        onComplete: function(transport){
            if (200 == transport.status) {
                result = transport.responseText;
            }
        }
    });
    return result;
}

我发现结果"是一个空字符串.所以，我试过这个:

And I find that the "result" is an empty string. So, I tried this:

somefunction: function(){
    var result = "";
    myAjax = new Ajax.Request(postUrl, {
        method: 'post',
        postBody: postData,
        contentType: 'application/x-www-form-urlencoded',
        onComplete: function(transport){
            if (200 == transport.status) {
                result = transport.responseText;
                return result;
            }
        }
    });

}

但它也不起作用.如何获取 responseText 以供其他方法使用?

But it didn't work also. How can I get the responseText for other method to use?

推荐答案

请记住，在 someFunction 完成工作后很长一段时间内都会调用 onComplete.您需要做的是将回调函数作为参数传递给 somefunction.当进程完成工作(即onComplete)时将调用此函数:

remember that onComplete is called long after the someFunction is done working. What you need to do is pass a callback function to the somefunction as a parameter. This function will be called when the process is done working (ie, onComplete):

somefunction: function(callback){
    var result = "";
    myAjax = new Ajax.Request(postUrl, {
        method: 'post',
        postBody: postData,
        contentType: 'application/x-www-form-urlencoded',
        onComplete: function(transport){
            if (200 == transport.status) {
                result = transport.responseText;
                callback(result);
            }
        }
    });

}
somefunction(function(result){
  alert(result);
});

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