FluentValidation - 验证多个属性

Question

有一个表格，用户可以输入事件的开始日期/时间和结束日期/时间。这里的验证至今：

public class EventModelValidator : AbstractValidator<EventViewModel> 
    { 
     public EventModelValidator() 
     { 
      RuleFor(x => x.StartDate) 
       .NotEmpty().WithMessage("Date is required!") 
       .Must(BeAValidDate).WithMessage("Invalid date"); 
      RuleFor(x => x.StartTime) 
       .NotEmpty().WithMessage("Start time is required!") 
       .Must(BeAValidTime).WithMessage("Invalid Start time"); 
      RuleFor(x => x.EndTime) 
       .NotEmpty().WithMessage("End time is required!") 
       .Must(BeAValidTime).WithMessage("Invalid End time"); 
      RuleFor(x => x.Title).NotEmpty().WithMessage("A title is required!"); 
     } 


     private bool BeAValidDate(string value) 
     { 
      DateTime date; 
      return DateTime.TryParse(value, out date); 
     } 

     private bool BeAValidTime(string value) 
     { 
      DateTimeOffset offset; 
      return DateTimeOffset.TryParse(value, out offset); 
     } 

    } 

现在我还想添加验证该EndDateTime>的startDateTime（合并日期+时间属性），但不知道如何去做。

编辑： 为了澄清，我需要以某种方式合并结束日期+结束时间/起始日期+开始时间即DateTime.Parse（src.StartDate + “” + src.StartTime），然后验证EndDateTime对比的startDateTime - 怎么办我这样做？

Answer 1

终于得到它的工作我重读documentation后：“请注意，是必须在附加重载，也接受的一个实例父对象被验证。“

public class EventModelValidator : AbstractValidator<EventViewModel> 
    { 
     public EventModelValidator() 
     { 
      RuleFor(x => x.StartDate) 
       .NotEmpty().WithMessage("Date is required!") 
       .Must(BeAValidDate).WithMessage("Invalid date"); 
      RuleFor(x => x.StartTime) 
       .NotEmpty().WithMessage("Start time is required!") 
       .Must(BeAValidTime).WithMessage("Invalid Start time"); 
      RuleFor(x => x.EndTime) 
       .NotEmpty().WithMessage("End time is required!") 
       .Must(BeAValidTime).WithMessage("Invalid End time") 
       // new 
       .Must(BeGreaterThan).WithMessage("End time needs to be greater than start time"); 
      RuleFor(x => x.Title).NotEmpty().WithMessage("A title is required!"); 
     } 


     private bool BeAValidDate(string value) 
     { 
      DateTime date; 
      return DateTime.TryParse(value, out date); 
     } 

     private bool BeAValidTime(string value) 
     { 
      DateTimeOffset offset; 
      return DateTimeOffset.TryParse(value, out offset); 
     } 
     // new 
     private bool BeGreaterThan(EventViewModel instance, string endTime) 
     { 
      DateTime start = DateTime.Parse(instance.StartDate + " " + instance.StartTime); 
      DateTime end = DateTime.Parse(instance.EndDate + " " + instance.EndTime); 
      return (DateTime.Compare(start, end) <= 0); 
     } 
    } 

有可能做到这一点更清洁/更legant的方式，但现在，它WORKSFORME。

Answer 2

你可以可以尝试使用GreaterThan规则：

RuleFor(x => x.EndDate) 
    .GreaterThan(x => x.StartDate) 
    .WithMessage("end date must be after start date");