asp.net-web-api – mvc webapi cross domain post

Possible Duplicate:
07000

我正在尝试在我的webApi项目中实现跨域ajax文章.我几乎没有麻烦：
我一直在得到204错误,直到更改了我的webapi操作

public void submit(Submission model)

至

public bool submit(Submission model)

不知道为什么,但现在我得到200 OK状态
还是我的ajax发射错误回调.
很久以前,我通过添加解决了这种跨域发布的错误

HttpContext.Response.AddHeader("Access-Control-Allow-Origin","*");

给我的控制器但现在在webApi我固有的：ApiController和这个技巧不起作用.显示编译器错误对象引用是非静态字段,方法或属性“System.Web.HttpContext.Response.get”所必需的
我尝试通过dataType：’JSONP’发布,但是我得到空模型.
这里是Javascript请求：

var model = {
        "type": $("#model-type").val(),"subject": $("#subject-text").val(),"body": $("#body-text").val()
    };

    $.ajax({
        type: "POST",dataType: 'JSONP',url: $("#submit-url").val(),data: model,success: function () {
            alert("Succesfully submitted");
        },error: function () {
            alert("Error...");
        }
    });

我做错了什么？

解决了

感谢大家帮助我.我在一个评论链接中找到了解决方案.我使用以下方法,我觉得很简单.
资源：
Implementing CORS support in ASP.NET Web APIs

我做了什么
1.在我的项目中创建新的类：CorsHandler.cs,只是复制粘贴以下代码：

public class CorsHandler : DelegatingHandler
    {
        const string Origin = "Origin";
        const string AccessControlRequestMethod = "Access-Control-Request-Method";
        const string AccessControlRequestHeaders = "Access-Control-Request-Headers";
        const string AccessControlAllowOrigin = "Access-Control-Allow-Origin";
        const string AccessControlAllowMethods = "Access-Control-Allow-Methods";
        const string AccessControlAllowHeaders = "Access-Control-Allow-Headers";

        protected override Task SendAsync(HttpRequestMessage request,CancellationToken cancellationToken)
        {
            bool isCorsRequest = request.Headers.Contains(Origin);
            bool isPreflightRequest = request.Method == HttpMethod.Options;
            if (isCorsRequest)
            {
                if (isPreflightRequest)
                {
                    return Task.Factory.StartNew(() =>
                    {
                        HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
                        response.Headers.Add(AccessControlAllowOrigin,request.Headers.GetValues(Origin).First());

                        string accessControlRequestMethod = request.Headers.GetValues(AccessControlRequestMethod).FirstOrDefault();
                        if (accessControlRequestMethod != null)
                        {
                            response.Headers.Add(AccessControlAllowMethods,accessControlRequestMethod);
                        }

                        string requestedHeaders = string.Join(",",request.Headers.GetValues(AccessControlRequestHeaders));
                        if (!string.IsNullOrEmpty(requestedHeaders))
                        {
                            response.Headers.Add(AccessControlAllowHeaders,requestedHeaders);
                        }

                        return response;
                    },cancellationToken);
                }
                else
                {
                    return base.SendAsync(request,cancellationToken).ContinueWith(t =>
                    {
                        HttpResponseMessage resp = t.Result;
                        resp.Headers.Add(AccessControlAllowOrigin,request.Headers.GetValues(Origin).First());
                        return resp;
                    });
                }
            }
            else
            {
                return base.SendAsync(request,cancellationToken);
            }
        }
    }

>打开我的Global.asax并修改Application_Start：

protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();

            RegisterGlobalFilters(GlobalFilters.Filters);
            RegisterRoutes(RouteTable.Routes);

            GlobalConfiguration.Configuration.MessageHandlers.Add(new CorsHandler());
        }

注意行动的最后一行.
此方法与MVC3和.NET 4.0兼容.工作很好,现在我可以处理ajax中的“成功”和“错误”回调.