1

我想将从 ajax 调用获得的结果转换为 JavaScript 数组。如何在不使用 jQuery 的情况下做到这一点？

或者也可以只循环 json 数组而不转换为 JavaScript 数组。

现在我只需要提醒我从 ASMX 服务获得的结果。使用 jQuery 不是任何选择。

来自请求的数据：

string xmlns="http://tempuri.org/"
[{"Action":"Test1","Target":"#cTarget","Payload":"Hello"},{"Action":"Test2","Target":"#cTarget","Payload":"World"}]
string

      [
           {
                 "Action":"Test1",
                 "Target":"#cTarget",
                 "Payload":"Hello"
           },         
           {
                 "Action":"Test2",
                 "Target":"#cTarget",
                 "Payload":"World"
           }
      ]

JavaScript 代码

  var httpRequest;

    function makeRequest(url, input) {
        if (window.XMLHttpRequest) { // Mozilla, Safari, ...
            httpRequest = new XMLHttpRequest();
        } else if (window.ActiveXObject) { // IE
            try {
                httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
            } 
            catch (e) {
                try {
                    httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
                } 
                catch (e) {}
            }
        }

        if (!httpRequest) {
            alert('Giving up :( Cannot create an XMLHTTP instance');
            return false;
        }
        httpRequest.onreadystatechange = function(){
            if (httpRequest.readyState === 4) {
                if (httpRequest.status === 200) {
                    var results = httpRequest.responseText;
                        var asJavaScriptArray = JSON.parse(results);

                    }
                }
            //}
        };

        httpRequest.open('POST', url);
        httpRequest.setRequestHeader('Content-Type', 'application/json');
        httpRequest.send(input);
    }

    var endpointAddress = "Core/RecipeDemo.asmx";
    var url = endpointAddress + "/Base";
    makeRequest(url, "{}");`

C# 代码

[System.Web.Script.Services.ScriptService]
public class RecipeDemo : System.Web.Services.WebService
{

    [WebMethod]
    public string Base()
    {

        List<Recipe> listOfRecipe = new List<Recipe>();
        JavaScriptSerializer  jss = new JavaScriptSerializer();

        listOfRecipe.Add(new Recipe {Action = "Test1", Payload = "Hello", Target = "#cTarget"});
        listOfRecipe.Add(new Recipe {Action = "Test2", Payload = "World", Target = "#cTarget"});

        return jss.Serialize(listOfRecipe);
                }
}
4

2 回答 2

4

您应该已经有一些东西可以将 JSON 字符串作为对象

JSON.parse(myJsonString)

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse

从一个对象返回到字符串JSON.stringify(myObject)

于 2013-09-04T21:48:30.187 回答
-1

您确实意识到 JSON 是 javascript 的有效子集，不是吗？

这意味着将 JSON 字符串反序列化为 Javascript 对象非常简单：

var json = MakeAjaxRequestHere() ;
var deseralizedJsonObject = eval( '(' + json + ')' ) ;

One should note, though, that unless you trust the source of the JSON, eval has some risks as it will evaluate any javascript program. See http://www.json.org/js.html for more.

于 2013-09-04T22:02:38.523 回答