NHiberate验证程序的开始日期早于结束日期。
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使用Nhibernate Validator（具有S＃harp体系结构/ MVC3），如何编写自定义属性，最好不是特定于对象的属性（因为这是相当普遍的要求），以强制执行PropertyA> = PropertyB（或者在更一般的情况下，两者都可以为null）。
就像是
public DateTime? StartDate { get; set; }
[GreaterThanOrEqual(\"StartDate\")]
public DateTime? EndDate { get; set; }
Entity
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坊岔埠绵
[AttributeUsage(AttributeTargets.Class)] [ValidatorClass(typeof(ReferencedByValidator))] public class GreaterThanOrEqualAttribute : EmbeddedRuleArgsAttribute, IRuleArgs { public GreaterThanOrEqualAttribute(string firstProperty, string secondProperty) { /// Set Properties etc } } public class ReferencedByValidator : IInitializableValidator<GreaterThanOrEqualAttribute> { #region IInitializableValidator<ReferencedByAttribute> Members public void Initialize(GreaterThanOrEqualAttribute parameters) { this.firstProperty = parameters.FirstProperty; this.secondProperty = parameters.SecondProperty; } #endregion #region IValidator Members public bool IsValid(object value, IConstraintValidatorContext constraintContext) { // value is the object you are trying to validate // some reflection code goes here to compare the two specified properties } #endregion }逆捐凶撤小
public class DateRangeModel : IValidatableObject { public DateTime StartDate { get; set; } public DateTime EndDate { get; set; } public IEnumerable<ValidationResult> Validate(ValidationContext validationContext) { List<ValidationResult> results = new List<ValidationResult>(); if (StartDate > EndDate) { results.Add(new ValidationResult(\"The Start Date cannot be before the End Date.\", \"StartDate\")); } return results; }