如何返回AJAX响应文本?

时间:2009-08-04 03:55:28

标签: ajax prototypejs javascript

我使用原型进行AJAX开发,我使用这样的代码:

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:

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。如何获取其他方法的responseText?

2 个答案:

答案 0 :(得分:28)

请记住,在someFunction完成工作后很久就会调用onComplete。您需要做的是将回调函数作为参数传递给somefunction。当过程完成工作时(即onComplete),将调用此函数:

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);
});

答案 1 :(得分:3)

如何在代码中添加“asynchronous:false”?就我而言,它运作良好:)