asp.net - 验证 ASP.NET MVC 中的字符串数组

Question

我使用 ASP.NET MVC。如何验证 View 模型中的字符串数组。因为“Required”属性不适用于字符串数组。

[DisplayName("Content Name")]
[Required(ErrorMessage = "Content name is required")]
public string[] ContentName { get; set; }

Answer 1

您可以创建自定义验证属性:http://www.codeproject.com/Articles/260177/Custom-Validation-Attribute-in-ASP-NET-MVC

public class StringArrayRequiredAttribute : ValidationAttribute
{
    protected override ValidationResult IsValid (object value, ValidationContext validationContext)
    {
        string[] array = value as string[];

        if(array == null || array.Any(item => string.IsNullOrEmpty(item)))
        {
            return new ValidationResult(this.ErrorMessage);
        }
        else
        {
            return ValidationResult.Success;
        }
    }
}

然后你可以像这样使用:

[DisplayName("Content Name")]
[StringArrayRequired(ErrorMessage = "Content name is required")]
public string[] ContentName { get; set; }