更新到5.1.0后将数据发布到WebApi失败

Question

我有一个使用webapi加载/保存数据的Web应用程序所有用于工作正常/今天我发现有一个更新到ASP.NET MVC/webapi,我安装了更新但是之后使用jquery的POSTing数据不再有效.我在客户端代码或webapi控制器中没有做任何更改.

我的典型POSt语句如下所示:

showProgress(true, self.PanelID(), 'Saving...')
j$.ajax({
    type: "POST",
    url: uri,
    data: dataObj,
    error: function (jqXHR, status, error) {
        showProgress(false);
        GLOBAL.setMessage(self, 'Error saving ' + opType + '<br>' + error, true);
    },
    success: function (data, status, jqXHR) {
        showProgress(false);
        if (status === 'success') {
        GLOBAL.setMessage(self, opType + " saved ok");
        //....

$ .ajax代码收到以下错误

"An error has occurred."

ExceptionMessage
    "This method or property is not supported after HttpRequest.Form, Files, InputStream, or BinaryRead has been invoked."

ExceptionType
    "System.Web.HttpException"

StackTrace
at System.Web.HttpRequest.GetInputStream(Boolean persistEntityBody, Boolean disableMaxRequestLength) 
at System.Web.HttpRequestWrapper.GetBufferedInputStream() 
at System.Web.Http.WebHost.SeekableBufferedRequestStream..ctor(HttpRequestBase request) 
at System.Web.Http.WebHost.HttpControllerHandler.c__DisplayClass11.b__b() at System.Web.Http.WebHost.HttpControllerHandler.LazyStreamContent.get_StreamContent() at System.Web.Http.WebHost.HttpControllerHandler.LazyStreamContent.CreateContentReadStreamAsync() at System.Net.Http.HttpContent.ReadAsStreamAsync() at System.Net.Http.HttpContentExtensions.d__0`1.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.ModelBinding.FormatterParameterBinding.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.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.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.Filters.AuthorizationFilterAttribute.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.Dispatcher.HttpControllerDispatcher.d__0.MoveNext()"

这些是我的解决方案中的nuget包

  package id="Microsoft.AspNet.Mvc" version="5.1.0" targetFramework="net45" 
  package id="Microsoft.AspNet.Razor" version="3.1.0" targetFramework="net45" 
  package id="Microsoft.AspNet.SignalR.Client" version="2.0.1" targetFramework="net45" 
  package id="Microsoft.AspNet.Web.Optimization" version="1.1.2" targetFramework="net45" 
  package id="Microsoft.AspNet.WebApi" version="5.1.0" targetFramework="net45" 
  package id="Microsoft.AspNet.WebApi.Client" version="5.1.0" targetFramework="net45" 
  package id="Microsoft.AspNet.WebApi.Core" version="5.1.0" targetFramework="net45" 
  package id="Microsoft.AspNet.WebApi.HelpPage.VB" version="5.1.0" targetFramework="net45" 
  package id="Microsoft.AspNet.WebApi.OData" version="5.1.0" targetFramework="net45" 
  package id="Microsoft.AspNet.WebApi.WebHost" version="5.1.0" targetFramework="net45" 
  package id="Microsoft.AspNet.WebPages" version="3.1.0" targetFramework="net45" 
  package id="Microsoft.Bcl" version="1.1.6" targetFramework="net45" 
  package id="Microsoft.Bcl.Build" version="1.0.13" targetFramework="net45" 
  package id="Microsoft.Data.Edm" version="5.6.0" targetFramework="net45" 
  package id="Microsoft.Data.OData" version="5.6.0" targetFramework="net45" 
  package id="Microsoft.Net.Http" version="2.2.18" targetFramework="net45" 
  package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net45" 

有谁知道可能是什么问题？有关如何解决它的任何想法？

编辑

样本控制器代码:

Public Class ImportController
    Inherits ApiController

    
    
    Public Function SaveImportSession(sessid As string,  entity As SIImportSessionDTO) As HttpResponseMessage

        Try
            InspectionData.SaveImportSession(sessid, entity)
            Dim response = Request.CreateResponse(HttpStatusCode.Accepted)
            Return response
        Catch ex As HttpResponseException
            Throw
        Catch ex As Exception
            Throw New HttpResponseException(Request.CreateResponse(Of String)(HttpStatusCode.InternalServerError, ex.Message))
        End Try
    End Function

我只使用基于属性的路由,这是我的webapi路由配置

Public Shared Sub Register(ByVal config As HttpConfiguration)

        config.MapHttpAttributeRoutes()

        config.Routes.MapHttpRoute( _
            name:="DefaultApi", _
            routeTemplate:="api/{controller}/{id}", _
            defaults:=New With {.id = RouteParameter.Optional} _

问题是,我的服务器端代码甚至没有达到,管道上的其他东西抛出异常

谢谢

Answer 1

我发现了这个问题.

我的帖子代码使用$ .ajax(...),如初始消息中所示.

但是jquery的.ajax将数据发布为application/x-www-form-urlencoded.这在以前的WebAPI版本中有效,但在最新的更新中,它似乎默认不接受application/x-www-form-urlencoded.

我将内容类型更改为application/json,我不得不将数据转换为json,这解决了问题.

所以,而不是

j$.ajax({
    type: "POST",
    url: uri,
    data: dataObj,
    success: function(...)

我不得不换到

j$.ajax({
    type: "POST",
    url: uri,
    data: JSON.stringify(dataObj),
    contentType: "application/json; charset=utf-8",
    success: function(...)