Validate IP

[Dave]

Hello.

Is there any method to validate if string contains valid IP address?
I also need the method to valideta email address in string.

Thank you.

 

[Dave]

Oh! it's too dificalt for me can you show me it for IP validating please?

you need to use regular expressions.

i.e. to validate a uk post code example

string postCodeRegEx =
@"(^((([A-PR-UWYZ])([0-9][0-9A-HJKS-UW]?))|(([A-PR-UWYZ][A-HK-Y])([0-9][0-9ABEHMNPRV-Y]?))\s{0,2}(([0-9])([ABD-HJLNP-UW-Z])([ABD-HJLNP-UW-Z])))|(((GI)(R))\s{0,2}((0)(A)(A)))$)|(^
*$)";

if (System.Text.RegularExpressions.Regex.IsMatch("W1A 1BC",postCodeRegEx)
== false) {
MessageBox.Show("Not a valid post code");
}

Regular expressions look fairly daunting, but like a complex SQL query, if
you do it in parts, they're fairly straight forward.

You need to know about www.regexlib.com also, otherwise you'll spend ages
reinventing the wheel. Here you can find literally 1,000s of reg
expressions people have already written.
There are also tools for testing them, etc.

HTH
Sam

Hello.

Is there any method to validate if string contains valid IP address?
I also need the method to valideta email address in string.

Thank you.

 

[Sam Martin]

you need to use regular expressions.

i.e. to validate a uk post code example

string postCodeRegEx =
@"(^((([A-PR-UWYZ])([0-9][0-9A-HJKS-UW]?))|(([A-PR-UWYZ][A-HK-Y])([0-9][0-9ABEHMNPRV-Y]?))\s{0,2}(([0-9])([ABD-HJLNP-UW-Z])([ABD-HJLNP-UW-Z])))|(((GI)(R))\s{0,2}((0)(A)(A)))$)|(^
*$)";

if (System.Text.RegularExpressions.Regex.IsMatch("W1A 1BC",postCodeRegEx) ==
false) {
MessageBox.Show("Not a valid post code");
}

Regular expressions look fairly daunting, but like a complex SQL query, if
you do it in parts, they're fairly straight forward.

You need to know about www.regexlib.com also, otherwise you'll spend ages
reinventing the wheel. Here you can find literally 1,000s of reg
expressions people have already written.
There are also tools for testing them, etc.

HTH
Sam

 

[Joe Mayo]

Hi Dave,

You can use regular expressions. Here's how:

http://msdn.microsoft.com/library/d...s/cpguide/html/cpconCOMRegularExpressions.asp

And here's a site you can search for regular expressions without having to
create all of them yourself:

http://regexlib.com/

Joe

 

[Sam Martin]

you're having a laugh right, all you had to do was get another regular
expression from the site listed in both responses to your post

one Reg ex i got from that very site after search for "IP" was
@"\b(([01]?\d?\d|2[0-4]\d|25[0-5])\.){3}([01]?\d?\d|2[0-4]\d|25[0-5])\b"(try
it, http://www.regexlib.com/Search.aspx >> "IP" >> Search)

If you send me you prject specification, i'll code it all for you

HTH
Sam

(ps, im only joking)

Oh! it's too dificalt for me can you show me it for IP validating please?

you need to use regular expressions.

i.e. to validate a uk post code example

string postCodeRegEx =
@"(^((([A-PR-UWYZ])([0-9][0-9A-HJKS-UW]?))|(([A-PR-UWYZ][A-HK-Y])([0-9][0-9ABEHMNPRV-Y]?))\s{0,2}(([0-9])([ABD-HJLNP-UW-Z])([ABD-HJLNP-UW-Z])))|(((GI)(R))\s{0,2}((0)(A)(A)))$)|(^
*$)";

if (System.Text.RegularExpressions.Regex.IsMatch("W1A 1BC",postCodeRegEx)
== false) {
MessageBox.Show("Not a valid post code");
}

Regular expressions look fairly daunting, but like a complex SQL query,
if you do it in parts, they're fairly straight forward.

You need to know about www.regexlib.com also, otherwise you'll spend ages
reinventing the wheel. Here you can find literally 1,000s of reg
expressions people have already written.
There are also tools for testing them, etc.

HTH
Sam

Hello.

Is there any method to validate if string contains valid IP address?
I also need the method to valideta email address in string.

Thank you.

 

[Nicholas Paldino [.NET/C# MVP]]

Dave,

To validate an IP address, use the static Parse method on the IPAddress
class in the System.Net namespace.

To validate the email address in a string, I would use the Uri class,
adding "mailto:" before the address, and trying to create a Uri instance
from that. If it throws an exception, then you know it is not valid.

Hope this helps.