C# Web api post 参数始终为空

Question

我正在使用 token 在 C# 中做一个 Web API，但我需要接收 postman 的参数到我的方法

 [HttpPost, Route("api/cobro/saveEmail")]
    public IHttpActionResult SaveEmailForDiscount([FromBody] string email)
    {
        //do something with e-mail
        return Ok(email);
    }

但电子邮件始终为空

这是 PostMan 请求

POST /api/cobro/saveEmail HTTP/1.1
Host: localhost:53107
Content-Type: application/x-www-form-urlencoded
Cache-Control: no-cache
Postman-Token: 881045b2-0f08-56ac-d345-ffe2f8f87f5e

email=jose%40gm.com

这是我的启动类，里面有所有的配置

    using System;
using Microsoft.Owin;
using Owin;
using Microsoft.Owin.Security.OAuth;
using System.Web.Http;
using System.Net.Http.Headers;

[assembly: OwinStartup(typeof(Cobros_BackEnd.Startup))]

namespace Cobros_BackEnd
{
    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {


     app.UseCors(Microsoft.Owin.Cors.CorsOptions.AllowAll);

        var MyProvider = new AuthorizationServerProvider();
        OAuthAuthorizationServerOptions options = new OAuthAuthorizationServerOptions
        {

            AllowInsecureHttp = true,
            TokenEndpointPath = new PathString("/token"),
            AccessTokenExpireTimeSpan = TimeSpan.FromDays(1),
            Provider = MyProvider
        };
        app.UseOAuthAuthorizationServer(options);
        app.UseOAuthBearerAuthentication(new OAuthBearerAuthenticationOptions());

        HttpConfiguration config = new HttpConfiguration();
        config.Formatters.JsonFormatter.SupportedMediaTypes
        .Add(new MediaTypeHeaderValue("text/xml"));

        //get all users
        config.Routes.MapHttpRoute(
            name: "Users",
            routeTemplate: "api/{controller}/users",
            defaults: new { id = RouteParameter.Optional }
            );



        WebApiConfig.Register(config);
    }
  }
}

我在 GET 中使用其他方法并且一切正常，但我需要在 POST 中使用它

Answer 1

您可以像这样创建一个类包装器电子邮件字段

public class SaveEmailModel{
    public string Email{get;set;}
}

public IHttpActionResult SaveEmailForDiscount([FromBody] SaveEmailModel model){
...
}