Re: Using Regex in C# for ip:port format - C# Discussion Boards

Re: Using Regex in C# for ip:port format

Mirko19802-Dec-08 2:36

Mirko1980

2-Dec-08 2:36

This behavior is correct, because the regexp you wrote checks for matches contained in the input string.
If you want to match the whole string only, you must add ^ at the begin and $ at the end of your regex.

For Example: "^\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}:\d{1,5}$"

Re: Using Regex in C# for ip:port format

leppie2-Dec-08 2:38

leppie

2-Dec-08 2:38

Mirko1980 wrote:
For Example: "^\d{1,3}.\d{1,3}.\d{1,3}.\d{1,3}:\d{1,5}$"

Wrong, try again.

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Re: Using Regex in C# for ip:port format

J4amieC2-Dec-08 2:57

J4amieC

2-Dec-08 2:57

It wasn't that wrong. I have to be honest I missed the unescaped . and thought of the other half of the problem (^,$ to match beginning and end)

Re: Using Regex in C# for ip:port format

leppie2-Dec-08 3:00

leppie

2-Dec-08 3:00

J4amieC wrote:
It wasn't that wrong.

Yes, it was. Input 123a123b123c123, then it is completely wrong Poke tongue | ;-P

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Re: Using Regex in C# for ip:port format

leppie2-Dec-08 2:38

leppie

2-Dec-08 2:38

You need to escape the '.' else it will match anything.

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Re: Using Regex in C# for ip:port format

Mirko19802-Dec-08 3:24

Mirko1980

2-Dec-08 3:24

That is true, too. You must also replace all the . with \.

So, the regex is "^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}:\d{1,5}$"
Take in mind that also the above regex is not absolutely correct. For example, it matches also 999.999.999.999:3000.

Re: Using Regex in C# for ip:port format

Andy Rama2-Dec-08 19:01

Andy Rama

2-Dec-08 19:01

Mirko1980 wrote:
"^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}:\d{1,5}$"

Thanks. It's working to check proper format of string.

Still I am working to check proper formt of string with correct ip address & port.

Thanks & Regards,
Aniket A. Salunkhe

Re: Using Regex in C# for ip:port format

Navneet Hegde2-Dec-08 2:48

Navneet Hegde

2-Dec-08 2:48

Try This :
System.Text.RegularExpressions.Regex regStr = new System.Text.RegularExpressions.Regex(@"^[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}:[0-9]{1,5}$");

Thanks!

Develop2Program & Program2Develop

Re: Using Regex in C# for ip:port format

leppie2-Dec-08 2:57

leppie

2-Dec-08 2:57

Wrong! Same mistake as Mirko1980.

Try 123a123a123a123, your regex will match that too!

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Re: Using Regex in C# for ip:port format

Navneet Hegde2-Dec-08 3:09

Navneet Hegde

2-Dec-08 3:09

But this work's fine.
MessageBox.Show(System.Text.RegularExpressions.Regex.IsMatch("123a123a123a123", @"^[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}:[0-9]{1,5}$", System.Text.RegularExpressions.RegexOptions.ExplicitCapture).ToString());

Thanks!

Develop2Program & Program2Develop

Re: Using Regex in C# for ip:port format

Navneet Hegde2-Dec-08 3:13

Navneet Hegde

2-Dec-08 3:13

Hmmmm not working for
2221.1.1:3000
Sorry!

Develop2Program & Program2Develop

Re: Using Regex in C# for ip:port format

leppie2-Dec-08 3:21

leppie

2-Dec-08 3:21

Navneet Hegde wrote:
Hmmmm not working for
2221.1.1:3000

Well, that is not suppose to work...

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Re: Using Regex in C# for ip:port format

leppie2-Dec-08 3:17

leppie

2-Dec-08 3:17

Sorry make that 123a123a123a123:1

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Re: Using Regex in C# for ip:port format

Navneet Hegde2-Dec-08 3:26

Navneet Hegde

2-Dec-08 3:26

This should work
@"^[0-9]{1,3}[.][0-9]{1,3}[.][0-9]{1,3}[.][0-9]{1,3}[:][0-9]{1,5}$"

Thanks!

Develop2Program & Program2Develop

Re: Using Regex in C# for ip:port format

leppie2-Dec-08 3:30

leppie

2-Dec-08 3:30

Navneet Hegde wrote:
This should work

Rather use \. than [.] . Some regex implementations might see [.] as .

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Re: Using Regex in C# for ip:port format

Navneet Hegde2-Dec-08 3:34

Navneet Hegde

2-Dec-08 3:34

Sure
thx!

Develop2Program & Program2Develop

Re: Using Regex in C# for ip:port format

PIEBALDconsult2-Dec-08 3:34

PIEBALDconsult

2-Dec-08 3:34

I'd just try to open the port and let the framework figure it out.

Re: Using Regex in C# for ip:port format

Luc Pattyn2-Dec-08 3:40

Luc Pattyn

2-Dec-08 3:40

PIEBALDconsult wrote:
let the framework figure it out.

and miss all the fun regexing IPv6?

Luc Pattyn [Forum Guidelines] [My Articles]

Fixturized forever. Confused | :confused:

Re: Using Regex in C# for ip:port format

PIEBALDconsult2-Dec-08 3:51

PIEBALDconsult

2-Dec-08 3:51

I'm more concerned about, "that which will come after IPv6".

Let Microsoft do all the work, that's why I pay them. Big Grin | :-D

Re: Using Regex in C# for ip:port format

Roink2-Dec-08 3:45

Roink

2-Dec-08 3:45

Another thread came up with:

@"^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}[:][0-9]{1,5}$"

But what if you want to constrain the octets to ONLY values from 0 to 255? And what if you really wanna go whole hog and constrain the port to 0 to 65535?

I don't know regular expressions that well, so I am curious.

Roink

Roink

Re: Using Regex in C# for ip:port format

J4amieC2-Dec-08 5:10

J4amieC

2-Dec-08 5:10

Roink wrote:
But what if you want to constrain the octets to ONLY values from 0 to 255? And what if you really wanna go whole hog and constrain the port to 0 to 65535?

Then you head over to www.regexplib.com and you do a search[^]

Re: Using Regex in C# for ip:port format

Roink2-Dec-08 5:24

Roink

2-Dec-08 5:24

As they say in Britain, Brilliant! Everything a growing RegEx coder needs! Thank you! Muchas gracias! Merci beaucoup!

Roink

Re: Using Regex in C# for ip:port format

J4amieC2-Dec-08 5:49

J4amieC

2-Dec-08 5:49

Roink wrote:
As they say in Britain, Brilliant

I think they say that in other countries too, not just here in GB!

Re: Using Regex in C# for ip:port format

PIEBALDconsult2-Dec-08 9:30

PIEBALDconsult

2-Dec-08 9:30

No, it's only there. Big Grin | :-D

Re: Using Regex in C# for ip:port format [modified]

Andy Rama2-Dec-08 22:39

Andy Rama

2-Dec-08 22:39

Roink,
Thanks for the solution.

Following is working to check proper ip & port. I found this from regexlib.com.
But still need to do varification for port as 0,00,000, etc or 0*.

<br />
@"^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5]):(\d{1,4}|[0-5]\d\d\d\d|[0-5]\d\d\d\d|6[0-4]\d\d\d|65[0-4]\d\d|655[0-2]\d|6553[0-5])$"<br />

Thanks & Regards,
Aniket A. Salunkhe

modified on Wednesday, December 3, 2008 4:47 AM

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