如何手动创建Ajax请求？ [英] How create ajax request manually?

问题描述

我需要发送请求的动作/主页/启动

I need send request to action /Home/Start

在元素IDjs_script。

Response set in element id 'js_script'.

我找不到如何做到这一点。

I can not find how to do it.

推荐答案

如果你想要的是一个基本要求，那么你可以很容易地做到这一点，而不与任何功能的图书馆在这里找到的 http://www.quirksmode.org/js/xmlhttp.html

If all you want is a basic request then you can do it easily without any libraries with the functions find here http://www.quirksmode.org/js/xmlhttp.html

function sendRequest(url,callback,postData) {
    var req = createXMLHTTPObject();
    if (!req) return;
    var method = (postData) ? "POST" : "GET";
    req.open(method,url,true);
    req.setRequestHeader('User-Agent','XMLHTTP/1.0');
    if (postData)
        req.setRequestHeader('Content-type','application/x-www-form-urlencoded');
    req.onreadystatechange = function () {
        if (req.readyState != 4) return;
        if (req.status != 200 && req.status != 304) {
//          alert('HTTP error ' + req.status);
            return;
        }
        callback(req);
    }
    if (req.readyState == 4) return;
    req.send(postData);
}

var XMLHttpFactories = [
    function () {return new XMLHttpRequest()},
    function () {return new ActiveXObject("Msxml2.XMLHTTP")},
    function () {return new ActiveXObject("Msxml3.XMLHTTP")},
    function () {return new ActiveXObject("Microsoft.XMLHTTP")}
];

function createXMLHTTPObject() {
    var xmlhttp = false;
    for (var i=0;i<XMLHttpFactories.length;i++) {
        try {
            xmlhttp = XMLHttpFactories[i]();
        }
        catch (e) {
            continue;
        }
        break;
    }
    return xmlhttp;
}

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