C# HTTP侦听器显示多条消息问题

在我的项目（.net core 2.2+angular 8）中，为了显示一个错误HttpInterceptor，它工作得非常完美， 但对于多条消息，它也可以工作，但不会显示正确的错误消息。 我得到了这样的东西：

[object Object] One or more validation errors occurred. 400 0HLRCTBS664E8:00000002

我的拦截器看起来像：

@Injectable()
export class ErrorInterceptor implements HttpInterceptor {
    intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
        return next.handle(req).pipe(
            catchError(error => {
                if (error instanceof HttpErrorResponse) {
                    if (error.status === 401) {
                        return throwError(error.statusText);
                    }
                    const applicationError = error.headers.get('Application-Error');
                    if (applicationError) {
                        console.error(applicationError);
                        return throwError(applicationError);
                    }
                    const serverError = error.error;
                    let modalStateErrors = '';
                    if (serverError && typeof serverError === 'object') {
                        for (const key in serverError) {
                            if (serverError[key]) {
                                modalStateErrors += serverError[key] + '\n';
                            }
                        }
                    }
                    return throwError(modalStateErrors || serverError || 'Server Error');
                }
            })
        )
    }
}

export const ErrorInterceptorProvide = {
    provide: HTTP_INTERCEPTORS,
    useClass: ErrorInterceptor,
    multi: true
}

    public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        else
        {
            app.UseExceptionHandler(builder =>
            {
                builder.Run(async context =>
                {
                    context.Response.StatusCode = (int) HttpStatusCode.InternalServerError;

                    var error = context.Features.Get<IExceptionHandlerFeature>();
                    if (error != null)
                    {
                        context.Response.AddApplicationError(error.Error.Message);
                        await context.Response.WriteAsync(error.Error.Message);
                    }
                });
            });                
        }


        app.UseCors(x => x.AllowAnyOrigin().AllowAnyMethod().AllowAnyHeader());
        app.UseAuthentication();

        app.UseMvc();

    }
 }

我的Startup类看起来像：

@Injectable()
export class ErrorInterceptor implements HttpInterceptor {
    intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
        return next.handle(req).pipe(
            catchError(error => {
                if (error instanceof HttpErrorResponse) {
                    if (error.status === 401) {
                        return throwError(error.statusText);
                    }
                    const applicationError = error.headers.get('Application-Error');
                    if (applicationError) {
                        console.error(applicationError);
                        return throwError(applicationError);
                    }
                    const serverError = error.error;
                    let modalStateErrors = '';
                    if (serverError && typeof serverError === 'object') {
                        for (const key in serverError) {
                            if (serverError[key]) {
                                modalStateErrors += serverError[key] + '\n';
                            }
                        }
                    }
                    return throwError(modalStateErrors || serverError || 'Server Error');
                }
            })
        )
    }
}

export const ErrorInterceptorProvide = {
    provide: HTTP_INTERCEPTORS,
    useClass: ErrorInterceptor,
    multi: true
}

    public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        else
        {
            app.UseExceptionHandler(builder =>
            {
                builder.Run(async context =>
                {
                    context.Response.StatusCode = (int) HttpStatusCode.InternalServerError;

                    var error = context.Features.Get<IExceptionHandlerFeature>();
                    if (error != null)
                    {
                        context.Response.AddApplicationError(error.Error.Message);
                        await context.Response.WriteAsync(error.Error.Message);
                    }
                });
            });                
        }


        app.UseCors(x => x.AllowAnyOrigin().AllowAnyMethod().AllowAnyHeader());
        app.UseAuthentication();

        app.UseMvc();

    }
 }

---

似乎您的API中存在问题

避免此错误的最佳方法是抑制此错误

要禁用自动400行为，请设置 SuppressModelStateInvalidFilter属性设置为true。添加以下内容 Startup.ConfigureServices中突出显示的代码：

这是本文中包含的代码：

services.AddMvc()

.SetCompatibilityVersion(CompatibilityVersion.Version_2_2)
.ConfigureApiBehaviorOptions(options =>
{
    options.SuppressConsumesConstraintForFormFileParameters = true;
    options.SuppressInferBindingSourcesForParameters = true;
    options.SuppressModelStateInvalidFilter = true;
    options.SuppressMapClientErrors = true;
    options.ClientErrorMapping[404].Link =
        "https://httpstatuses.com/404";
});

---

microsoft

似乎您的API存在问题

避免此错误的最佳方法是抑制此错误

要禁用自动400行为，请设置 SuppressModelStateInvalidFilter属性设置为true。添加以下内容 Startup.ConfigureServices中突出显示的代码：

这是本文中包含的代码：

services.AddMvc()

.SetCompatibilityVersion(CompatibilityVersion.Version_2_2)
.ConfigureApiBehaviorOptions(options =>
{
    options.SuppressConsumesConstraintForFormFileParameters = true;
    options.SuppressInferBindingSourcesForParameters = true;
    options.SuppressModelStateInvalidFilter = true;
    options.SuppressMapClientErrors = true;
    options.ClientErrorMapping[404].Link =
        "https://httpstatuses.com/404";
});

---

我试过微软的

但不起作用。有趣的是，我试过显示一条信息，但它不起作用。有趣的是，它只显示一条信息