API post 未检测到原始 json 模型

Question

我再次尝试使用控制器的 post 方法，但该方法没有捕获 json 模型。休息，所有类型的标题都在工作，而不是 json post。

public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }
    readonly string CorsPolicy = "MyPolicy";

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        // Add Cors
        services.AddCors(o => o.AddPolicy(CorsPolicy, builder =>
        {
            builder.AllowAnyOrigin()
                   .AllowAnyMethod()
                   .AllowAnyHeader();
        }));

        services.AddControllersWithViews();

    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        else
        {
            app.UseExceptionHandler("/Home/Error");
            // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
            app.UseHsts();
        }
        app.UseHttpsRedirection();
        app.UseStaticFiles();

        app.UseRouting();
        app.UseCors(CorsPolicy);

        app.UseAuthorization();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllerRoute(
                name: "default",
                pattern: "{controller=Home}/{action=Index}/{id?}");
        });
    }

谁能指导我应该改变什么？ 或者我哪里错了？

Answer 1

尝试匹配字段名称的大小写，并包含引号，例如"DepartmentId": 0

并且确认请求有Content-Type: application/json

Answer 2

由于您使用的是 json ，因此您必须将 [FromBody] 添加到操作中

pubic ActionResult Post([FromBody] department)

同时修复邮递员中的 json

{
    "DepartmentId": 0,
    "DepartmentName": "bpu"
}

还支持无敏感字母大小写，将这些选项添加到启动

using Newtonsoft.Json.Serialization;
.....

services.AddControllersWithViews()
    .AddNewtonsoftJson(options =>
           options.SerializerSettings.ContractResolver =
              new CamelCasePropertyNamesContractResolver());