派生的requireattribute不起作用

本文关键字：不起作用 requireattribute 派生 | 更新日期: 2023-09-27 18:08:38

我正在尝试实现我自己的RequiredAttribute，其中我调用自定义资源处理程序:

public class LocalizedValidationAttributes
{
    public class LocalizedRequiredAttribute : RequiredAttribute
    {
        private String _resourceString = String.Empty;
        public new String ErrorMessage
        {
            get { return _resourceString; }
            set { _resourceString = GetMessageFromResource(value); }
        }
    }
    private static String GetMessageFromResource(String resourceTag)
    {
        return ResourceManager.Current.GetResourceString(resourceTag);
    }
}

我这样调用它:

[LocalizedValidationAttributes.LocalizedRequiredAttribute(ErrorMessage = "test")]
public String Text { get; set; }

但是ErrorMessage的getter永远不会被调用。

提示吗?谢谢!

派生的requireattribute不起作用

试试:

public class LocalizedRequiredAttribute : RequiredAttribute
{
    public override string FormatErrorMessage(string name)
    {
        return ResourceManager.Current.GetResourceString(name);
    }
}

或者像这样:

public class LocalizedRequiredAttribute : RequiredAttribute
{
    public LocalizedRequiredAttribute(string resourceTag)
    {
        ErrorMessage = GetMessageFromResource(resourceTag);
    }
    private static String GetMessageFromResource(String resourceTag)
    {
        return ResourceManager.Current.GetResourceString(resourceTag);
    }
}

然后:

[LocalizedValidationAttributes.LocalizedRequiredAttribute("test")]
public String Text { get; set; }