促进回调的onSuccess返回值的调用函数返回值 [英] Promote callback onSuccess return value to the Caller Function return value

问题描述

我有一个JavaScript函数来调用一个通用的功能进行AJAX调用服务器。我需要从Ajax调用回调函数检索结果（真/假），但结果我得到的总是未定义。

I have a javascript function that calls a generic function to make an ajax call to the server. I need to retrieve a result (true/false) from the callback function of the ajax call, but the result I get is always 'undefined'.

通用功能的超简化的版本，而我所有的逻辑是：

A super-simplified version of the generic function without all my logic would be:

function CallServer(urlController) {
    $.ajax({
        type: "POST",
        url: urlController,
        async: false,
        data: $("form").serialize(),
        success:
            function(result) {
                if (someLogic)
                   return true;
                else
                   return false;
            },
        error:
            function(errorThrown) {
                return false;
            }
    });
}

和函数调用它会是这样的：

And the function calling it would be something like:

function Next() {
        var result = CallServer("/Signum/TrySave");
        if (result == true) {
            document.forms[0].submit();
        }
    }

结果变量始终是未定义，并调试它，我可以看到，回归真正的行回调函数正在执行。

The "result" variable is always 'undefined', and debugging it I can see that the "return true" line of the callback function is being executed.

为什么发生这种情况的任何想法？我怎么能的泡沫的从回调函数的返回值的CallServer功能？

Any ideas of why this is happening? How could I bubble the return value from the callback function to the CallServer function?

感谢

推荐答案

刚刚找到如何做到这一点:)声明一个变量，然后从回调函数相应地更新它。后来我可以返回变量。我把code为未来的读者：

Just found how to do it :) Declaring a variable and updating it accordingly from the callback function. Afterwards I can return that variable. I place the code for future readers:

function CallServer(urlController) {
    var returnValue = false;
    $.ajax({
        type: "POST",
        url: urlController,
        async: false,
        data: $("form").serialize(),
        success:
            function(result) {
                if (someLogic){
                    returnValue = true;
                    return;
                }
            },
        error:
            function(errorThrown) {
                alert("Error occured: " + errorThrown);
            }
        });

        return returnValue;
}

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