这是获取其他属性值的方法：
public class CustomAttribute : ValidationAttribute{ private readonly string _other; public CustomAttribute(string other) { _other = other; } protected override ValidationResult IsValid(object value, ValidationContext validationContext) { var property = validationContext.ObjectType.GetProperty(_other); if (property == null) { return new ValidationResult( string.Format("Unknown property: {0}", _other) ); } var otherValue = property.GetValue(validationContext.ObjectInstance, null); // at this stage you have "value" and "otherValue" pointing // to the value of the property on which this attribute // is applied and the value of the other property respectively // => you could do some checks if (!object.Equals(value, otherValue)) { // here we are verifying whether the 2 values are equal // but you could do any custom validation you like return new ValidationResult(this.FormatErrorMessage(validationContext.DisplayName)); } return null; }}
