Asp.Net Core 数据校验(DataAnnotations,FluentValidation)

1.Asp.Net Core 数据校验(DataAnnotations,FluentValidation)

1.1 DataAnnotations

.NET Core中内置了对数据校验的支持，System.ComponentModel.DataAnnotations

• [Required]
• [EmailAddress]
• [RegularExpression]
• [[Phone]]
• CustomValidationAttribute
• IValidatableObject

添加用户的接口

请求参数验证

1.2 FluentValidation

FluentValidation：用类似于EF Core中Fluent API的方式进行校验规则的配置，也就是我们可以把对模型类的校验放到单独的校验类中。

(1)Install-Package FluentValidation.AspNetCore

(2)注入FluentValidation

builder.Services.AddFluentValidation(fv => {
    Assembly assembly = Assembly.GetExecutingAssembly();
    fv.RegisterValidatorsFromAssembly(assembly);// RegisterValidatorsFromAssemblies
});

(3) AbstractValidator<>

public class CreateUserRequestValidator : AbstractValidator<CreateUserRequest>
{

    public CreateUserRequestValidator(UserManager<User> userManager)
    {
        //用户名
        RuleFor(x => x.UserName).NotNull()
            //异步
            //.MustAsync(async (name,_) => (await userManager.Users.LongCountAsync<User>(u => u.UserName == name)) == 0)
            .Must(name => userManager.Users.LongCount<User>(u => u.UserName == name) == 0)
            .WithMessage(c => $"用户名{c.UserName}已经存在");
        //密码
        RuleFor(x => x.Password).NotNull().Length(3, 10)
             .WithMessage("密码长度必须介于3到10之间")
             .Equal(x => x.ConfimPassword)
             .WithMessage("两次密码必须一致");
        //邮箱
        RuleFor(x => x.Email).NotNull().EmailAddress()
            .WithMessage("邮箱格式不正确");
        //电话
        RuleFor(x => x.PhoneNumber).NotNull()
            .Must(IsPhone)
            .WithMessage("电话必须是11位数字");

    }

    private bool IsPhone(string str)
    {
        var re = @"^1\d{10}$";//正则表达式
        if (Regex.IsMatch(str, re))
        {
            return true;
        }
        return false;
    }
}

(4)测试