Question

I want to make users to enter this pattern in textboxes in asp.net mvc3:

[digit][digit]Code[digit][digit][digit][letter][digit][digit]

I prefer to use annotations but I could not find proper one.

Answer 1

You can use the RegularExpressionAttribute attribute

Example taken from MSDN

[MetadataType(typeof(CustomerMetaData))]
public partial class Customer
{


}

public class CustomerMetaData
{

    // Allow up to 40 uppercase and lowercase 
    // characters. Use custom error.
    [RegularExpression(@"^[a-zA-Z''-'\s]{1,40}$", 
         ErrorMessage = "Characters are not allowed.")]
    public object FirstName;

    // Allow up to 40 uppercase and lowercase 
    // characters. Use standard error.
    [RegularExpression(@"^[a-zA-Z''-'\s]{1,40}$")]
    public object LastName;
}