问题
Can I use the MVC 2 DataAnnotations to specify a minimum length for a string field?
Has anyone done this or have they created custom attributes and if so do you mind sharing the source?
回答1:
If you're using asp.net 4.0, you can use the StringLength attribute to specify a minimum length.
Eg:
[StringLength(50, MinimumLength=1)]
public string MyText { get; set; }
回答2:
Use a regular expression attribute. These are interpreted on the client side as well.
[RegularExpression(Regexes.MinStringLength)]
public string MyText { get; set; }
Where Regexes.MinStringLength is a static regular expression class. Inline would look like this:
[RegularExpression(@"^.{5,10}$")] // valid five to ten characters
public string MyText { get; set; }
来源：https://stackoverflow.com/questions/2489766/asp-net-mvc-2-dataannotations-stringlength