Ip validation .net core

public class IPAddressAttribute : ValidationAttribute
{

    protected override ValidationResult IsValid(object value, ValidationContext validationContext)
    {
        YourViewModel yourviewmodel = (YourViewModel)validationContext.ObjectInstance;

        const string regexPattern = @"^([\d]{1,3}\.){3}[\d]{1,3}$";
        var regex = new Regex(regexPattern);
        if (string.IsNullOrEmpty(yourviewmodel.IpAddress))
        {
            return new ValidationResult("IP address  is null");
        }
        if (!regex.IsMatch(yourviewmodel.IpAddress )|| yourviewmodel.IpAddress.Split('.').SingleOrDefault(s => int.Parse(s) > 255)!=null)
        return new ValidationResult("Invalid IP Address");


        return ValidationResult.Success;
    }
}

// use
[IPAddressAttribute]
[Display(Name = "IP Address")]
public string IpAddress { get; set; }

Source: stackoverflow.com

Similar codes

0 vote127 views1 answer
Unity camera follow with lerp
C#
1 vote134 views1 answer
Unity awake
C#
0 vote148 views1 answer
Unity draw waypoins path
C#
9 votes161 views2 answers
Quit button unity
C#Unity
0 vote119 views1 answer
Open project in visual studio using command prompt
C#
3 votes134 views1 answer
C sharp split by newline
C#
2 votes168 views1 answer
Unity default rotation
C#Unity
1 vote124 views1 answer
Randomize through array in C#
C#
0 vote109 views1 answer
Remove tag anchor and inside tag from html raw text c#
C#
7 votes123 views3 answers
C# string to bool
C#