如何使用新的错误消息创建自定义MaxLength和Required验证，逻辑保持不变

Question

[MaxLength(45, ErrorMessage = Translations.Attribute.MAX_LENGTH)]
[Required(ErrorMessage = Translations.Attribute.REQUIRED)]

如何使用默认的已翻译消息创建自定义Required和MaxLength验证。我可以简单地覆盖它并仅更改errorMessage吗？

我只想写

[MyMaxLength(45)]
[MyRequired]

已建立所需解决方案：

public class MyRequiredAttribute : RequiredAttribute
    {
        public override string FormatErrorMessage(string name)
        {
            return string.Format("Polje {0} je obvezno", name);
        }
    }

Answer 1

您应该能够从MaxLengthAttribute或任何其他正在使用的属性中得出...

public class MyMaxLengthAttribute : MaxLengthAttribute
{
    public MyMaxLengthAttribute(int length) : base(length)
    {
        ErrorMessage = Translations.Attribute.MAX_LENGTH;
    }

    // other ctors/members as needed
}