7

我正在使用 Web API 创建登录服务。当我检查fiddler它工作正常但当我检查它postman时chrome显示错误：

{    "Message": "An error has occurred.",
    "ExceptionMessage": "No MediaTypeFormatter is available to read an object of type 'user' from content with media type 'multipart/form-data'.",
    "ExceptionType": "System.InvalidOperationException",
    "StackTrace": "   
    at System.Net.Http.HttpContentExtensions.ReadAsAsync[T](HttpContent content, Type type, IEnumerable`1 formatters, IFormatterLogger formatterLogger)\r\n
    at System.Net.Http.HttpContentExtensions.ReadAsAsync(HttpContent content, Type type, IEnumerable`1 formatters, IFormatterLogger formatterLogger)\r\n
    at System.Web.Http.ModelBinding.FormatterParameterBinding.ReadContentAsync(HttpRequestMessage request, Type type, IEnumerable`1 formatters, IFormatterLogger formatterLogger)\r\n
    at System.Web.Http.ModelBinding.FormatterParameterBinding.ExecuteBindingAsync(ModelMetadataProvider metadataProvider, HttpActionContext actionContext, CancellationToken cancellationToken)\r\n
    at System.Web.Http.Controllers.HttpActionBinding.<>c__DisplayClass1.<ExecuteBindingAsync>b__0(HttpParameterBinding parameterBinder)\r\n
    at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext()\r\n
    at System.Threading.Tasks.TaskHelpers.IterateImpl(IEnumerator`1 enumerator, CancellationToken cancellationToken)" 
}


public class user
{
    //public user(string userId, string password)
    //{
    //    UserId = userId;
    //    Password = password;
    //}

    public string UserId { get; set; }
    public string Password { get; set; }
}

我正在检查postman此服务是否能够在移动应用程序中访问。另外，在mac系统中检查这个。

4

2 回答 2

15

单击标题按钮，键入标题和值

Content-Type: application/json

检查下面的链接以获取小提琴和邮递员都使用相同的内容类型 在 POST 中将 json 发送到 Web API 服务时出错

于 2014-06-05T10:41:22.470 回答
0

我遇到了同样的问题，但后来我发现我正在使用 ajax POST 调用 WebAPI，而不是将其更改为 GET 并且它有效。但错误主要是误导。所以我一直专注于媒体类型。

此资源不支持请求实体的媒体类型“text/plain”。",

$http({             
method: 'POST',

将其更改为

$http({             
method: '**GET**',
于 2015-12-20T19:00:43.470 回答