c# - 在 WebApi 的 Asp Core 2.2 中创建自定义返回错误验证

Question

我需要在 WebApi 的 Asp Core 2.2 中创建创建自定义返回验证。

第一步 ：

我创建一个OnResultExecuting：

public override void OnResultExecuting(ResultExecutingContext context)
{
 if (context.Result is BadRequestObjectResult badRequestObjectResult)
        {
            var message = badRequestObjectResult.Value.ToString();
            if (badRequestObjectResult.Value is SerializableError errors)
            {
                var errorMessages = errors.SelectMany(p => (string[])p.Value).Distinct();
                message = string.Join(" | ", errorMessages);
            }
            context.Result = new JsonResult(new ReturnResult(false, ResultStatus.BadRequest, message))
            { StatusCode = badRequestObjectResult.StatusCode };
        }
}

第二步：

我创建IValidatableObject一个UserDto：

 public class UserDto : IValidatableObject
{
    [Required]
    public string Name { get; set; }
    [Required]
    public string Family { get; set; }
    [Required]
    public string Password { get; set; }
    [Required]
    public string Username { get; set; }
    [Required]
    public string Email { get; set; }
    [Required]
    public string Phone { get; set; }
    [Required]
    public GenderType Gender { get; set; }


    public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
    {
        foreach (var item in ValidateList.UsernameBanList)
            if (Username.Equals(item, StringComparison.OrdinalIgnoreCase))
                yield return new ValidationResult("Username Invalid", new[] { nameof(Username) });
        foreach (var item in ValidateList.PasswordBanList)
            if (Password.Equals(item, StringComparison.OrdinalIgnoreCase))
                yield return new ValidationResult("Password Invalid, new[] { nameof(Password) });
        foreach (var item in ValidateList.EmailBanList)
            if (Email.Equals(item, StringComparison.OrdinalIgnoreCase))
                yield return new ValidationResult("Email Invalid", new[] { nameof(Email) });
    }
}

第三步：

我创建一个ReturnResult类：

public class ReturnResult
{
    public bool Success { get; }
    public ResultStatus Status { get; }
    public string Message { get; }

    public ReturnResult(bool Success, ResultStatus Status, string Message = null)
    {
        this.Success = Success;
        this.Status = Status;
        this.Message = Message ?? Status.ToDisplay();
    }

    #region implicit operator
    public static implicit operator ReturnResult(OkResult result)
    {
        return new ReturnResult(true, ResultStatus.Success);
    }

    public static implicit operator ReturnResult(BadRequestResult result)
    {
        return new ReturnResult(false, ResultStatus.BadRequest);
    }

    public static implicit operator ReturnResult(BadRequestObjectResult result)
    {
        var message = result.ToString();
        if (result.Value is SerializableError error)
        {
            var errorMessage = error.SelectMany(p => (string[])p.Value).Distinct();
            message = string.Join(" | ", errorMessage);
        }
        return new ReturnResult(false, ResultStatus.BadRequest, message);
    }

    public static implicit operator ReturnResult(ContentResult result)
    {
        return new ReturnResult(true, ResultStatus.Success, result.Content);
    }

    public static implicit operator ReturnResult(NotFoundResult result)
    {
        return new ReturnResult(false, ResultStatus.NotFound);
    }
    #endregion
}

现在全部以这种格式返回 Api ：

{
"success": true,
"status": 0,
"message": "success process"
 }

在UserDto我为用户名和密码以及电子邮件创建一个验证然后我需要返回它们的所有错误以这种格式返回：

{
"success": true,
"status": 0,
"message": "Email Invalid | Password Invalid | Username Invalid"
 }

但它没有以这种格式向我展示，它向我展示了这种格式：

{
"success": false,
"status": 2,
"message": "Microsoft.AspNetCore.Mvc.ValidationProblemDetails"
 }

我怎么解决这个问题 ？？？？

标签： c#asp.netasp.net-coreasp.net-core-webapi

Answer 1

试试看：

public static implicit operator ReturnResult(BadRequestObjectResult result)
        {
            System.Reflection.PropertyInfo pi = result.Value.GetType().GetProperty("Errors");
            Dictionary<string, string[]> errors = (Dictionary<string, string[]>)(pi.GetValue(result.Value, null));

            var message = result.ToString();
            var errorMessage = error.SelectMany(p => p.Value).Distinct();
            message = string.Join(" | ", errorMessage);
            return new ReturnResult(false, ResultStatus.BadRequest, message);
        }