Question

WebForms 4.5.1，WebAPI 2
基于ABP Boilerplate（http://aspnetboilerplate.com/版本0.4.1.0）的项目

我有一个Web API控制器定义如下：

[HttpPost]
public class EmailActivitiesController : ApiController
{
    public HttpResponseMessage EmailAClientWithNewMailMessage(FormDataCollection aFormData)
    {
    }
}

使用以下jQuery调用：

    var aFormData =  {};
    $.support.cors = true;
    $.ajax({
        cache: false,
        url: '/api/EmailActivities/EmailAClientWithNewMailMessage',
        type: "POST",
        dataType: "json",
        data: aFormData,
        success: function (callback) {
            //Platform.LoadingPanelHide();
            alert("Successfully sent the email.");
        },
        error: function (data) {
            var errorObject = JSON.parse(data);

            //Platform.LoadingPanelHide();
            alert('There was a problem sending the email message to the individual selected.\n\n' + errorObject.responseText.message);
        }
    });

并且所有工作和API方法都已达成。但是，只要我填充aFormData如下：

    var aFormData =  {};

    aFormData['aMessageInfo'] = "test";

    //And sending via form data
    $.support.cors = true;
    $.ajax({
        cache: false,
        url: '/api/EmailActivities/EmailAClientWithNewMailMessage',
        type: "POST",
        dataType: "json",
        data: aFormData,
        success: function (callback) {
            //Platform.LoadingPanelHide();
            alert("Successfully sent the email.");
        },
        error: function (data) {
            var errorObject = JSON.parse(data);

            //Platform.LoadingPanelHide();
            alert('There was a problem sending the email message to the individual selected.\n\n' + errorObject.responseText.message);
        }
    });

然后没有达到该方法，我接受了一个带有以下JSON响应的HttpResonseCode.OK：

{
"result": null,
"success": false,
"error": {
"code": 0,
"message": "An internal error occured during your request!",
"details": null,
"validationErrors": null
},
"unAuthorizedRequest": false
}

对于我的生活，我无法弄清楚为什么会这样。有没有人有任何见解。

更新

这是POST请求。 enter image description here

异常日志：

    ERROR 2015-01-29 15:51:08,250 [17   ] Default                                  - Processing of the HTTP request resulted in an exception. Please see the HTTP response returned by the 'Response' property of this exception for details.
System.Web.Http.HttpResponseException: Processing of the HTTP request resulted in an exception. Please see the HTTP response returned by the 'Response' property of this exception for details.
   at System.Web.Http.ModelBinding.FormatterParameterBinding.ReadContentAsync(HttpRequestMessage request, Type type, IEnumerable`1 formatters, IFormatterLogger formatterLogger, CancellationToken cancellationToken)
   at System.Web.Http.ModelBinding.FormatterParameterBinding.ReadContentAsync(HttpRequestMessage request, Type type, IEnumerable`1 formatters, IFormatterLogger formatterLogger)
   at System.Web.Http.ModelBinding.FormatterParameterBinding.<ExecuteBindingAsyncCore>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at System.Web.Http.Controllers.HttpActionBinding.<ExecuteBindingAsyncCore>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at System.Web.Http.Controllers.ExceptionFilterResult.<ExecuteAsync>d__0.MoveNext()

更新＃2

我现在已经采用了如下建议的使用DTO的方法：

var aMessageInfo = {
            subject: Base64.encode($("#txtSendEmailSubject").val()),
            body: Base64.encode($("#txtSendEmailBody").val())
        };

 $.support.cors = true;
        $.ajax({
            cache: false,
            url: '/api/EmailActivities/Dono2',
            type: "POST",
            dataType: "json",
            contentType: "application/json; charset=utf-8",
            data: JSON.stringify(aMessageInfo),
            success: function (callback) {
                //Platform.LoadingPanelHide();
                alert("Successfully sent the email.");
            },
            error: function (data) {
                var errorObject = JSON.parse(data);

                //Platform.LoadingPanelHide();
                alert('There was a problem sending the email message to the individual selected.\n\n' + errorObject.responseText.message);
            }
        });

然后在WebAPI中它可以工作，如果我只有：

   public class EmailActivitiesController : ApiController
    {
    [HttpPost]
        public HttpResponseMessage Dono2(MessageInfo aMessageInfo)
        {
        }
    }

但是，只要我还有 EmailAClientWithNewMailMessage 作为方法：

   public class EmailActivitiesController : ApiController
    {
    [HttpPost]
        public HttpResponseMessage Dono2(MessageInfo aMessageInfo)
        {
        }


  [HttpPost]
        public HttpResponseMessage EmailAClientWithNewMailMessage(FormDataCollection aFormData)
        {
}

我收到错误：

{  
   "message":"An error has occurred.",
   "exceptionMessage":"Multiple actions were found that match the request: \r\nDono2 on type MakersLane.WebApi.Controllers.EmailActivitiesController\r\nEmailAClientWithNewMailMessage on type MakersLane.WebApi.Controllers.EmailActivitiesController",
   "exceptionType":"System.InvalidOperationException",
   "stackTrace":"   at System.Web.Http.Controllers.ApiControllerActionSelector.ActionSelectorCacheItem.SelectAction(HttpControllerContext controllerContext)\r\n   at System.Web.Http.Controllers.ApiControllerActionSelector.SelectAction(HttpControllerContext controllerContext)\r\n   at Abp.WebApi.Controllers.Dynamic.Selectors.AbpApiControllerActionSelector.SelectAction(HttpControllerContext controllerContext)\r\n   at System.Web.Http.ApiController.ExecuteAsync(HttpControllerContext controllerContext, CancellationToken cancellationToken)\r\n   at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()"
}

现在虽然控制器Dono2和EmailClientWithNewMessage上有两个动作，但我不明白为什么它们不能被分开，因为它们显然有不同的名称，虽然它们都有一个参数，但它们的名称不同，并且属于不同类型。

任何人都可以解释为什么会这样吗？

Answer 1

我不在Windows机器上，因此现在无法测试此写入，但我将在下面提供替代解决方案。从POST中发送的查询字符串到FormDataCollection的映射存在问题，并且我认为它可以通过使用这样的JSON对象来解决：

{ aFormData : { aMessageInfo : "test" } }

但我无法证实。我相信以下解决方案会更好，所以除非必须使用FormDataCollection，否则请使用它。

我建议使用视图模型而不是FormDataCollection，因为值的映射变得乏味：

public class Message
{
    public string Client { get; set; }
    public string Content { get; set; }
}

然后将您的控制器更改为：

public HttpResponseMessage EmailAClientWithNewMailMessage(Message data)
{
    // use the deserialised object here
    return data.Client;
}

你的jquery看起来像这样（注意添加了content-type参数和JSON.stringify调用）：

var aFormData =  {};

aFormData['aMessageInfo'] = "test";

//And sending via form data
$.support.cors = true;
$.ajax({
    cache: false,
    url: '/api/EmailActivities/EmailAClientWithNewMailMessage',
    type: "POST",
    dataType: "json",
    contentType: "application/json; charset=utf-8",
    data: JSON.stringify(aFormData),
    success: function (callback) {
        //Platform.LoadingPanelHide();
        alert("Successfully sent the email.");
    },
    error: function (data) {
        var errorObject = JSON.parse(data);

        //Platform.LoadingPanelHide();
        alert('There was a problem sending the email message to the individual selected.\n\n' + errorObject.responseText.message);
    }
});

Answer 2

https://github.com/aspnetboilerplate/aspnetboilerplate/blob/593c47050c345cfa4617e06bc7f4ac19f5b81a15/src/Abp.Web.Api/WebApi/Controllers/Dynamic/Selectors/DyanamicHttpActionDescriptor.cs

我认为这段代码覆盖了结果。

try
                    {
                        if (task.Result == null)
                        {
                            return new AjaxResponse();
                        }

                        if (task.Result is AjaxResponse)
                        {
                            return task.Result;
                        }

                        return new AjaxResponse(task.Result);
                    }

Answer 3

你看过Logs / logs.txt文件了吗？它会抛出异常。

干杯杰夫

Answer 4

我觉得乔尔是对的。我有问题作为参数传递字符串，因此将我的所有输入包装在DTO对象中，它工作正常。

干杯杰夫

Answer 5

问题是：ABP系统配置为仅使用JSON数据。当您更改这样的代码时，它可以工作：

$.ajax({
    cache: false,
    url: '/api/EmailActivities/EmailAClientWithNewMailMessage',
    type: "POST",
    contentType: 'application/json',
    dataType: "json",
    data: JSON.stringify({ aMessageInfo: 'test' }),
    success: function (callback) {
        //Platform.LoadingPanelHide();
        alert("Successfully sent the email.");
    },
    error: function (data) {
        var errorObject = JSON.parse(data);

        //Platform.LoadingPanelHide();
        alert('There was a problem sending the email message to the individual selected.\n\n' + errorObject.responseText.message);
    }
});

我添加了contentType。以这种方式调用方法，但是表单数据不会出现在方法中。也许FormDataCollection不喜欢JSON帖子。

为什么你不使用简单的DTO类而不是FormDataCollection？这对于ABP项目来说更为自然。

在AbpWebApiModule中，它清除所有格式化程序并添加JSON和纯文本。

        private static void InitializeFormatters()
        {
            GlobalConfiguration.Configuration.Formatters.Clear();
            var formatter = new JsonMediaTypeFormatter();
            formatter.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
            GlobalConfiguration.Configuration.Formatters.Add(formatter);
            GlobalConfiguration.Configuration.Formatters.Add(new PlainTextFormatter());
        }

也许您可以使用GlobalConfiguration.Configuration.Formatters.Add添加其他格式化程序。

我是如何找到问题的？ ABP定义了一个处理异常的事件（从v0.3.2开始）：

enter image description here

这可以帮助您找到错误。

EventBus.Default.Register<AbpHandledExceptionData>(
    data =>
    {
        //use data.Exception to see exception details
    });

WebAPI中未访问带有FormData的HTTP Post

5 个答案: