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

1 vote124 views1 answer
How to create empty ui object unity
C#Unity
0 vote97 views1 answer
Get number of sundays in a month c#
C#
200 votes219 views12 answers
Nodemon not installing
C#
7 votes97 views2 answers
C# stop loop
C#
0 vote96 views1 answer
Stuck.hypixel.net ip
C#
2 votes95 views1 answer
C# previous method
C#
0 vote95 views1 answer
C# nullable generic
C#
1 vote90 views1 answer
C# close all threads application exit
C#
-1 vote94 views1 answer
How to compare two strings in c# using if condition
C#
1 vote117 views1 answer
Unity image
C#