WebApi:在ApiController之外创建自定义BadRequest状态开发者社区

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if(data == null)
   return BadRequest("Data must not be blank.");
}

    public static BadRequest GetBadRequestMessage(string message)
        return BadRequest(message);
    }

    public static BadRequestResult GetBadRequestMessage(string message)
        return new  BadRequestResult(message);
    }

return new BadRequestObjectResult("error message here");

/// <summary>
/// Creates an <see cref="BadRequestResult"/> that produces a <see cref="StatusCodes.Status400BadRequest"/> response.
/// </summary>
/// <returns>The created <see cref="BadRequestResult"/> for the response.</returns>
[NonAction]
public virtual BadRequestResult BadRequest()
    => new BadRequestResult();
/// <summary>
/// Creates an <see cref="BadRequestObjectResult"/> that produces a <see cref="StatusCodes.Status400BadRequest"/> response.
/// </summary>
/// <param name="error">An error object to be returned to the client.</param>
/// <returns>The created <see cref="BadRequestObjectResult"/> for the response.</returns>
[NonAction]
public virtual BadRequestObjectResult BadRequest(object error)
    => new BadRequestObjectResult(error);
/// <summary>
/// Creates an <see cref="BadRequestObjectResult"/> that produces a <see cref="StatusCodes.Status400BadRequest"/> response.
/// </summary>
/// <param name="modelState">The <see cref="ModelStateDictionary" /> containing errors to be returned to the client.</param>
/// <returns>The created <see cref="BadRequestObjectResult"/> for the response.</returns>
[NonAction]
public virtual BadRequestObjectResult BadRequest(ModelStateDictionary modelState)
    if (modelState == null)
        throw new ArgumentNullException(nameof(modelState));
    return new BadRequestObjectResult(modelState);
}

using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.DependencyInjection;
using System.Linq;
namespace Ioc
    public static class BadRequestConfig
        // error 400 handling - remove extra fields in error model - remove if(ModelState.IsValid)
        public static IMvcBuilder AddBadRequestServices(this IMvcBuilder services)
            services.ConfigureApiBehaviorOptions(options =>
            options.InvalidModelStateResponseFactory = actionContext =>
                var modelState = actionContext.ModelState.Values;
                var allErrors = actionContext.ModelState.Values.SelectMany(v => v.Errors);
                return new BadRequestObjectResult(new
                    StatusCode = 400,
                    Message = string.Join(" - ", allErrors.Select(e => e.ErrorMessage))
            return services;
}

public void ConfigureServices(IServiceCollection services)

问 WebApi:在ApiController之外创建自定义BadRequest状态 EN

回答 2

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