可以使用NuGet 添加类库
下面是程序：
using FluentValidation;
using System;
using System.Linq;
namespace TestFluentValidation
{
class Program
{
static void Main(string[] args)
{
var orders = new Orders() { DisCount = 2, CustomerID = "1", OrderDate = DateTime.Now.AddDays(-1).Date };
IValidator validator = new OrdersValidator();
var results = validator.Validate(orders);
var validationSucceeded = results.IsValid;
var failures = results.Errors;
Console.WriteLine(failures.Any(t => t.PropertyName == "CustomerID"));
Console.WriteLine(failures.Any(t => t.PropertyName == "DisCount"));
Console.WriteLine(failures.Any(t => t.PropertyName == "OrderDate.Date"));
failures.ToList().ForEach(t => Console.WriteLine(t.ErrorMessage));
Console.Read();
}
}
public class Orders
{
public int ID { get; set; }
public string CustomerID { get; set; }
public decimal DisCount { get; set; }
public DateTime OrderDate { get; set; }
}
public class OrdersValidator : AbstractValidator<Orders>
{
public OrdersValidator()
{
RuleFor(orders => orders.CustomerID).NotEmpty().Length(2, 20).WithName("CustomerID");
RuleFor(orders => orders.DisCount).GreaterThanOrEqualTo(0).LessThan(1).WithMessage("discount must between 0 and 1!");
RuleFor(orders => orders.OrderDate.Date).GreaterThanOrEqualTo(DateTime.Now.Date).WithName("Order Date");
}
}
}