如何在C＃中使用EmailAddressAttribute驗證字符串列表？

Question

我有一堂課說“請求”。 它具有以下兩個屬性。 收件人的電子郵件驗證工作正常。 但是，它不適用於收件人。

[EmailAddress] 
public string Recipient { get; set; }

[EmailAddress] 
public List<string> Recipients { get; set; }

感謝任何幫助。

Answer 1

您可以在自定義屬性中使用現有的EmailAddress屬性。

[AttributeUsage(AttributeTargets.Property)]
public sealed class EmailAddressListAttribute : ValidationAttribute
{
    private const string defaultError = "'{0}' contains an invalid email address.";
    public EmailAddressListAttribute()
        : base(defaultError) //
    {
    }

    public override bool IsValid(object value)
    {
        EmailAddressAttribute emailAttribute = new EmailAddressAttribute();
        IList<string> list = value as IList<string>;
        return (list != null && list.All(email => emailAttribute.IsValid(email)));
    }

    public override string FormatErrorMessage(string name)
    {
        return String.Format(this.ErrorMessageString, name);
    }
}

Answer 2

我結束了這個：

/// <summary>
/// 
/// </summary>
[DataContract]
public class EmailAddress
{
    /// <summary>
    /// 
    /// </summary>
    [DataMember]
    [EmailAddress]
    public string Id { get; set; }

    /// <summary>
    /// 
    /// </summary>
    [DataMember(Name = "Name")]
    public string DisplayName { get; set; }
}