I tried the following code for digits-only validation for a contact number validation in Mvc web app.
[RegularExpression(@\"/(^\\(\\d{10})?)$/\", ErrorMessage =
/ /
is javascript way to build a regular expression literal object. In .NET you should not use it.
Try the following:
@"^\((\d{10}?)\)$"
or if you want exactly 10 digits:
@"^(\d{10})$"
This worked for me:
[RegularExpression(@"^[0-9]{10}", ErrorMessage = "Please enter proper contact details.")]
If don't have any restrictions other than numbers only, this should fit:
[RegularExpression(@"^\d+$", ErrorMessage = "Please enter proper contact details.")]
[Required]
[Display(Name = "Contact No")]
public string ContactNo { get; set; }