Как дать валидацию для accountno и BSB no в MVC

	Account No* – Minimum and maximum of 8 numbers only.  It should accept the first number is a “0” only 

	BSB* – Minimum and maximum of 6 numbers only.  ACCEPTABLE FORMAT IS :   000-000 (this is example only.  Length:  must be 6 numbers only. 

[Required(ErrorMessage = "Please enter the BSB")]
       [Display(Name = "BSB")]
       [RegularExpression("^[0-9]*$", ErrorMessage = "Please Enter only Numbers")]
       [StringLength(6, ErrorMessage = "The BSB must be 6 numbers only.", MinimumLength = 6)]
       public string BSB { get; set; }

       [Required(ErrorMessage = "Please enter the AccountNo")]
       [RegularExpression("^[0-9]*$", ErrorMessage = "Please Enter only Numbers")]
       [StringLength(8, ErrorMessage = "The BankAccountNo must be 8 numbers only.", MinimumLength = 8)]
       public string BankAccountNo { get; set; }