如何覆盖默认的必需错误消息

问题描述：

我有一个旧的C#MVC 2.0 Web应用程序.

I have an old C# MVC 2.0 web application.

每当我使用[Required]属性时，默认的验证错误消息就会出现:

Whenever I use a [Required] attribute, the default validation error message goes:

[whatever]字段为必填.

The [whatever] field is required.

我的问题是应用程序不是英语的，所以我基本上必须在任何地方将属性调用更改为[Required(ErrorMessage = "Le champ [whatever] est requis.")].

My problem is that the application isn't in English, so I basically have to change the attribute call to [Required(ErrorMessage = "Le champ [whatever] est requis.")] everywhere.

是否有一种方法可以覆盖默认错误消息，因此仅在需要特定消息时才需要指定它?

Is there a way to override the default error message so I only have to specify it when I want a specific message?

我正在寻找类似的东西:

I'm looking for something like:

DefaultRequiredMessage = "Le champ {0} est requis.";

答

您可以创建一个类，并从

You can create a class and inherit it from RequiredAttribute. Something like this:

public class CustomRequired: RequiredAttribute
{
    public CustomRequired()
    {
        this.ErrorMessage = "Le champ est requis.";
    }
}

或者:

public class CustomRequired: RequiredAttribute
{
    public override string FormatErrorMessage(string whatever)
    {
        return !String.IsNullOrEmpty(ErrorMessage)
            ? ErrorMessage
            : $"Le champ {whatever} est requis.";
    }
}

您应该将CustomRequired与属性一起使用，而不是[Required].

You should use CustomRequired with your properties, rather than [Required].

如何覆盖默认的必需错误消息

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