Question

我构建了一个ASP.NET Web Api。现在，我已将项目更新为MVC 4 RC，但动态对象不再按预期工作了。

我有这个：

var Arr = new JsonArray();

foreach (var Post in Coll)
{
    dynamic Item = new JsonObject();
    Item.Header = Post.Header;
    Item.Body = Post.Body;
    Item.Language = Post.Language;
    Arr.Add(Item);
}

return Request.CreateResponse(HttpStatusCode.OK, Arr);

我得到的结果是（在浏览器中）：

[{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]},{"Header":[],"Body":[],"Language":[]}]

在debugg中我得到:(对象Arr）

{[{"Header":"All distances","Body":"All distances are ","Language":"EN"},{"Header":...

为什么会有所不同？

（Coll是对象列表）

Answer 1

尝试使用它

返回Request.CreateResponse（HttpStatusCode.OK，Arr.ToArray（））;

这只是一个猜测，如果您在调试中可以看到它，那么当您添加到监视列表并且观察者显示它时，您可能会强制计算对象。然后.ToArray（）也应该帮助你。

Answer 2

我猜你没有在客户端解析Arr到json数据。在客户端ajax方法中尝试这个：

 var obj = $.parseJSON(result);

结果是从服务器返回的值。你可以得到如下数组的每个对象：

        $(obj).each(function () {       
      // alert($(this).attr('Header'));  
 });

使用Request.CreateResponse返回JsonArray

2 个答案: