textbox or masktextbox for entering only ipv4 address in c#

Question

_{Friday, March 15, 2013 6:48 AM}

Hi everyone ..
please help  me designing a textbox or a masked textvbox for entering only the ipv4 address ..

I have used maskedtextbox and set the mask as..

mask=999.999.999.999

form when run shows--

___.___.___

when I try to enter an ip address as for example :-

10.45.65.1

I have to write :- 010.045.065.001

which I dont want to ..
means a user can press tab to switch on to the net subnet ip address ..

for example ..

10 (tab press). 45(tab press).65(tab press). 1

I dont want to write 0 (zeros) 

as well as I dont want user to enter subnet greater than 255..

please tell me how can I achieve my goal ..

All replies (2)

_{Tuesday, March 19, 2013 9:45 AM ✅Answered}

Hi GIFTED,

Please have a look at the article below which could help you.

A C# IP Address Control

http://www.codeproject.com/Articles/9352/A-C-IP-Address-Control

Good day.

Bob Shen
MSDN Community Support | Feedback to us
Develop and promote your apps in Windows Store
Please remember to mark the replies as answers if they help and unmark them if they provide no help.

_{Friday, March 15, 2013 8:02 AM}

Use a common TextBox but plz use a regular Expression to do validation, part of the Regular expression should be this:

1) Plz substitute Tab to "0":

string s = "2\t\t.2\t5.20\t.255";
            s = s.Replace('\t', '0');
            Console.WriteLine(s);

2) Then use Regex class to check:

Regex reg = new Regex(@"^[1-2]{0,1}[0-5]{0,1}[0-5]{1,3}\.([0-2]{0,1}[0-5]{0,1}[0-5]{1,3}\.){2}[0-2]{0,1}[0-5]{0,1}[0-5]{1,3}$");
Console.WriteLine(reg.Match("255.255.255.0").Success);

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