abp-validationlisted

# ABP Validation Skill ## Trigger Validation, DTO validation, FluentValidation, IValidatableObject, validation errors, AbpValidationException, input validation. --- ## Quick Reference ### Data Annotations ```csharp public class CreateBookDto { [Required] [StringLength(100)] public string Name { get; set; } [Range(0, 999.99)] public decimal Price { get; set; } } ``` Auto-validated on app service/controller call. ### IValidatableObject ```csharp public class CreateBookDto : IValidatableObject { public IEnumerable<ValidationResult> Validate(ValidationContext ctx) { var results = new List<ValidationResult>(); if (Price <= 0) results.Add(new ValidationResult("Price > 0", new[] { nameof(Price) })); return results; } } ``` Resolve services: `ctx.GetRequiredService<IMyService>()` ### FluentValidation ```bash abp add-package Volo.Abp.FluentValidation ``` ```csharp public class CreateBookDtoValidator : AbstractValidator<CreateBookDto> { public CreateBookDtoValidator() { RuleFor(x => x.Name).Length(3, 10); RuleFor(x => x.Price).ExclusiveBetween(0.0f, 999.0f); } } ``` Auto-discovered, associated with DTO type. ### IValidationEnabled ```csharp public class MyService : ITransientDependency, IValidationEnabled { public virtual async Task DoItAsync(MyInput input) { } } ``` Method must be `virtual` or use interface injection. ### Validation Error Respon