我正在使用 Web API 创建一个 Web 服务。我实现了一个简单的类

public class ActivityResult
{
    public String code;
    public int indexValue;
    public int primaryCodeReference;
}

然后我在我的 Controller 内部实现了

[HttpPost]
public HttpResponseMessage Post(ActivityResult ar)
{
    return new HttpResponseMessage(HttpStatusCode.OK);
}

但是当我调用 API 时传入 POST 文件 json:

{"code":"XXX-542","indexValue":"3","primaryCodeReference":"7"}

我收到以下错误消息:

{
    "Message": "The request entity's media type 'text/plain' is not supported for this resource.",
    "ExceptionMessage": "No MediaTypeFormatter is available to read an object of type 'ActivityResult' from content with media type 'text/plain'.",
    "ExceptionType": "System.Net.Http.UnsupportedMediaTypeException",
    "StackTrace": "   in System.Net.Http.HttpContentExtensions.ReadAsAsync[T](HttpContent content, Type type, IEnumerable`1 formatters, IFormatterLogger formatterLogger, CancellationToken cancellationToken)\r\n   in System.Net.Http.HttpContentExtensions.ReadAsAsync(HttpContent content, Type type, IEnumerable`1 formatters, IFormatterLogger formatterLogger, CancellationToken cancellationToken)\r\n   in System.Web.Http.ModelBinding.FormatterParameterBinding.ReadContentAsync(HttpRequestMessage request, Type type, IEnumerable`1 formatters, IFormatterLogger formatterLogger, CancellationToken cancellationToken)"
}

我做错了什么？

最佳答案

在HTTP请求中你需要设置Content-Type为:Content-Type: application/json

因此，如果您使用 fiddler 客户端，请将 Content-Type: application/json 添加到请求 header

https://stackoverflow.com/questions/22384354/