Mixing
C# Regex Validation Rule using Regex.Match()
I've written a Regular expression which should validate a string using the following rules:
- The first four characters must be alphanumeric.
- The alpha characters are followed by 6 or 7 numeric values for a total length of 10 or 11.
So the string should look like this if its valid:
CCCCNNNNNN or CCCCNNNNNNN
C being any character and N being a number.
My expression is written: @"^[0-9A-Za-z]{3}[0-9A-Za-z-]d{0,21}$";
My regex match code looks like this:
var cc1 = "FOOBAR"; // should fail.
var cc2 = "AAAA1111111111"; // should succeed
var regex = @"^[0-9A-Za-z]{3}[0-9A-Za-z-]d{0,21}$";
Match match = Regex.Match( cc1, regex, RegexOptions.IgnoreCase );
if ( cc1 != string.Empty && match.Success )
{
//"The Number must start with 4 letters and contain no numbers.",
Error = SeverityType.Error
}
I'm hoping someone can take a look at my expression and offer some feedback on improvements to produce a valid match.
Also, am I use .Match() correctly? If Match.Success is true, then does that mean that the string is valid?
c# regex validation
edited Jan 6 '12 at 21:38
dtb
171k26344402
asked Jan 6 '12 at 21:35
nocarriernocarrier
1,27422954
add a comment |
I've written a Regular expression which should validate a string using the following rules:
- The first four characters must be alphanumeric.
- The alpha characters are followed by 6 or 7 numeric values for a total length of 10 or 11.
So the string should look like this if its valid:
CCCCNNNNNN or CCCCNNNNNNN
C being any character and N being a number.
My expression is written: @"^[0-9A-Za-z]{3}[0-9A-Za-z-]d{0,21}$";
My regex match code looks like this:
var cc1 = "FOOBAR"; // should fail.
var cc2 = "AAAA1111111111"; // should succeed
var regex = @"^[0-9A-Za-z]{3}[0-9A-Za-z-]d{0,21}$";
Match match = Regex.Match( cc1, regex, RegexOptions.IgnoreCase );
if ( cc1 != string.Empty && match.Success )
{
//"The Number must start with 4 letters and contain no numbers.",
Error = SeverityType.Error
}
I'm hoping someone can take a look at my expression and offer some feedback on improvements to produce a valid match.
Also, am I use .Match() correctly? If Match.Success is true, then does that mean that the string is valid?
c# regex validation
edited Jan 6 '12 at 21:38
dtb
171k26344402
asked Jan 6 '12 at 21:35
nocarriernocarrier
1,27422954
add a comment |
I've written a Regular expression which should validate a string using the following rules:
- The first four characters must be alphanumeric.
- The alpha characters are followed by 6 or 7 numeric values for a total length of 10 or 11.
So the string should look like this if its valid:
CCCCNNNNNN or CCCCNNNNNNN
C being any character and N being a number.
My expression is written: @"^[0-9A-Za-z]{3}[0-9A-Za-z-]d{0,21}$";
My regex match code looks like this:
var cc1 = "FOOBAR"; // should fail.
var cc2 = "AAAA1111111111"; // should succeed
var regex = @"^[0-9A-Za-z]{3}[0-9A-Za-z-]d{0,21}$";
Match match = Regex.Match( cc1, regex, RegexOptions.IgnoreCase );
if ( cc1 != string.Empty && match.Success )
{
//"The Number must start with 4 letters and contain no numbers.",
Error = SeverityType.Error
}
I'm hoping someone can take a look at my expression and offer some feedback on improvements to produce a valid match.
Also, am I use .Match() correctly? If Match.Success is true, then does that mean that the string is valid?
c# regex validation
edited Jan 6 '12 at 21:38
dtb
171k26344402
asked Jan 6 '12 at 21:35
nocarriernocarrier
1,27422954
I've written a Regular expression which should validate a string using the following rules:
- The first four characters must be alphanumeric.
- The alpha characters are followed by 6 or 7 numeric values for a total length of 10 or 11.
So the string should look like this if its valid:
CCCCNNNNNN or CCCCNNNNNNN
C being any character and N being a number.
My expression is written: @"^[0-9A-Za-z]{3}[0-9A-Za-z-]d{0,21}$";
My regex match code looks like this:
var cc1 = "FOOBAR"; // should fail.
var cc2 = "AAAA1111111111"; // should succeed
var regex = @"^[0-9A-Za-z]{3}[0-9A-Za-z-]d{0,21}$";
Match match = Regex.Match( cc1, regex, RegexOptions.IgnoreCase );
if ( cc1 != string.Empty && match.Success )
{
//"The Number must start with 4 letters and contain no numbers.",
Error = SeverityType.Error
}
I'm hoping someone can take a look at my expression and offer some feedback on improvements to produce a valid match.
Also, am I use .Match() correctly? If Match.Success is true, then does that mean that the string is valid?
c# regex validation
c# regex validation
edited Jan 6 '12 at 21:38
dtb
171k26344402
asked Jan 6 '12 at 21:35
nocarriernocarrier
1,27422954
edited Jan 6 '12 at 21:38
dtb
171k26344402
asked Jan 6 '12 at 21:35
nocarriernocarrier
1,27422954
edited Jan 6 '12 at 21:38
dtb
171k26344402
edited Jan 6 '12 at 21:38
dtb
171k26344402
edited Jan 6 '12 at 21:38
dtb
171k26344402
171k26344402
asked Jan 6 '12 at 21:35
nocarriernocarrier
1,27422954
asked Jan 6 '12 at 21:35
nocarriernocarrier
1,27422954
asked Jan 6 '12 at 21:35
nocarriernocarrier
1,27422954
1,27422954
add a comment |
add a comment |
5 Answers
5
active
oldest
votes
The regex for 4 alphanumeric characters follows by 6 to 7 decimal digits is:
var regex = @"^w{4}d{6,7}$";
See: Regular Expression Language - Quick Reference
The Regex.Match Method returns a Match object. The Success Property indicates whether the match is successful or not.
var match = Regex.Match(input, regex, RegexOptions.IgnoreCase);
if (!match.Success)
{
// does not match
}
edited Nov 21 '16 at 0:39
SteveCav
5,6303851
answered Jan 6 '12 at 21:42
dtbdtb
171k26344402
add a comment |
The following code demonstrates the regex usage:
var cc1 = "FOOBAR"; // should fail.
var cc2 = "AAAA1111111"; // should succeed
var r = new Regex(@"^[0-9a-zA-Z]{4}d{6,7}$");
if (!r.IsMatch(cc2))
{
Console.WriteLine("cc2 doesn't match");
}
if (!r.IsMatch(cc1))
{
Console.WriteLine("cc1 doesn't match");
}
The output will be cc1 doesn't match.
answered Jan 6 '12 at 21:47
SmiSmi
10.2k74255
add a comment |
The following code is using a regular expression and checks 4 different patterns to test it, see output below:
using System;
using System.Text.RegularExpressions;
public class Program
{
public static void Main()
{
var p1 = "aaaa999999";
CheckMatch(p1);
p1 = "aaaa9999999";
CheckMatch(p1);
p1 = "aaaa99999999";
CheckMatch(p1);
p1 = "aaa999999";
CheckMatch(p1);
}
public static void CheckMatch(string p1)
{
var reg = new Regex(@"^w{4}d{6,7}$");
if (!reg.IsMatch(p1))
{
Console.WriteLine($"{p1} doesn't match");
}
else
{
Console.WriteLine($"{p1} matches");
}
}
}
Output:
aaaa999999 matches
aaaa9999999 matches
aaaa99999999 doesn't match
aaa999999 doesn't match
Try it as DotNetFiddle
edited Jun 12 '18 at 13:43
Matt
15.3k766109
answered Jun 12 '18 at 13:11
kirti kant pareekkirti kant pareek
473
add a comment |
Your conditions give:
The first four characters must be alphanumeric:[A-Za-zd]{4}
Followed by 6 or 7 numeric values:d{6,7}
Put it together and anchor it:
^[A-Za-zd]{4}d{6,7}z
Altho that depends a bit how you define "alphanumeric". Also if you are using ignore case flag then you can remove the A-Z range from the expression.
answered Jan 6 '12 at 21:43
QtaxQtax
27.4k554100
add a comment |
Try the following pattern:
@"^[A-za-zd]{4}d{6,7}$"
answered Jan 6 '12 at 21:46
BernardBernard
7,37723030
add a comment |
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5 Answers
5
active
oldest
votes
5 Answers
5
active
oldest
votes
active
oldest
votes
active
oldest
votes
The regex for 4 alphanumeric characters follows by 6 to 7 decimal digits is:
var regex = @"^w{4}d{6,7}$";
See: Regular Expression Language - Quick Reference
The Regex.Match Method returns a Match object. The Success Property indicates whether the match is successful or not.
var match = Regex.Match(input, regex, RegexOptions.IgnoreCase);
if (!match.Success)
{
// does not match
}
edited Nov 21 '16 at 0:39
SteveCav
5,6303851
answered Jan 6 '12 at 21:42
dtbdtb
171k26344402
add a comment |
The regex for 4 alphanumeric characters follows by 6 to 7 decimal digits is:
var regex = @"^w{4}d{6,7}$";
See: Regular Expression Language - Quick Reference
The Regex.Match Method returns a Match object. The Success Property indicates whether the match is successful or not.
var match = Regex.Match(input, regex, RegexOptions.IgnoreCase);
if (!match.Success)
{
// does not match
}
edited Nov 21 '16 at 0:39
SteveCav
5,6303851
answered Jan 6 '12 at 21:42
dtbdtb
171k26344402
add a comment |
The regex for 4 alphanumeric characters follows by 6 to 7 decimal digits is:
var regex = @"^w{4}d{6,7}$";
See: Regular Expression Language - Quick Reference
The Regex.Match Method returns a Match object. The Success Property indicates whether the match is successful or not.
var match = Regex.Match(input, regex, RegexOptions.IgnoreCase);
if (!match.Success)
{
// does not match
}
edited Nov 21 '16 at 0:39
SteveCav
5,6303851
answered Jan 6 '12 at 21:42
dtbdtb
171k26344402
The regex for 4 alphanumeric characters follows by 6 to 7 decimal digits is:
var regex = @"^w{4}d{6,7}$";
See: Regular Expression Language - Quick Reference
The Regex.Match Method returns a Match object. The Success Property indicates whether the match is successful or not.
var match = Regex.Match(input, regex, RegexOptions.IgnoreCase);
if (!match.Success)
{
// does not match
}
edited Nov 21 '16 at 0:39
SteveCav
5,6303851
answered Jan 6 '12 at 21:42
dtbdtb
171k26344402
edited Nov 21 '16 at 0:39
SteveCav
5,6303851
edited Nov 21 '16 at 0:39
SteveCav
5,6303851
edited Nov 21 '16 at 0:39
SteveCav
5,6303851
5,6303851
answered Jan 6 '12 at 21:42
dtbdtb
171k26344402
answered Jan 6 '12 at 21:42
dtbdtb
171k26344402
answered Jan 6 '12 at 21:42
dtbdtb
171k26344402
171k26344402
add a comment |
add a comment |
The following code demonstrates the regex usage:
var cc1 = "FOOBAR"; // should fail.
var cc2 = "AAAA1111111"; // should succeed
var r = new Regex(@"^[0-9a-zA-Z]{4}d{6,7}$");
if (!r.IsMatch(cc2))
{
Console.WriteLine("cc2 doesn't match");
}
if (!r.IsMatch(cc1))
{
Console.WriteLine("cc1 doesn't match");
}
The output will be cc1 doesn't match.
answered Jan 6 '12 at 21:47
SmiSmi
10.2k74255
add a comment |
The following code demonstrates the regex usage:
var cc1 = "FOOBAR"; // should fail.
var cc2 = "AAAA1111111"; // should succeed
var r = new Regex(@"^[0-9a-zA-Z]{4}d{6,7}$");
if (!r.IsMatch(cc2))
{
Console.WriteLine("cc2 doesn't match");
}
if (!r.IsMatch(cc1))
{
Console.WriteLine("cc1 doesn't match");
}
The output will be cc1 doesn't match.
answered Jan 6 '12 at 21:47
SmiSmi
10.2k74255
add a comment |
The following code demonstrates the regex usage:
var cc1 = "FOOBAR"; // should fail.
var cc2 = "AAAA1111111"; // should succeed
var r = new Regex(@"^[0-9a-zA-Z]{4}d{6,7}$");
if (!r.IsMatch(cc2))
{
Console.WriteLine("cc2 doesn't match");
}
if (!r.IsMatch(cc1))
{
Console.WriteLine("cc1 doesn't match");
}
The output will be cc1 doesn't match.
answered Jan 6 '12 at 21:47
SmiSmi
10.2k74255
The following code demonstrates the regex usage:
var cc1 = "FOOBAR"; // should fail.
var cc2 = "AAAA1111111"; // should succeed
var r = new Regex(@"^[0-9a-zA-Z]{4}d{6,7}$");
if (!r.IsMatch(cc2))
{
Console.WriteLine("cc2 doesn't match");
}
if (!r.IsMatch(cc1))
{
Console.WriteLine("cc1 doesn't match");
}
The output will be cc1 doesn't match.
answered Jan 6 '12 at 21:47
SmiSmi
10.2k74255
answered Jan 6 '12 at 21:47
SmiSmi
10.2k74255
answered Jan 6 '12 at 21:47
SmiSmi
10.2k74255
answered Jan 6 '12 at 21:47
SmiSmi
10.2k74255
10.2k74255
add a comment |
add a comment |
The following code is using a regular expression and checks 4 different patterns to test it, see output below:
using System;
using System.Text.RegularExpressions;
public class Program
{
public static void Main()
{
var p1 = "aaaa999999";
CheckMatch(p1);
p1 = "aaaa9999999";
CheckMatch(p1);
p1 = "aaaa99999999";
CheckMatch(p1);
p1 = "aaa999999";
CheckMatch(p1);
}
public static void CheckMatch(string p1)
{
var reg = new Regex(@"^w{4}d{6,7}$");
if (!reg.IsMatch(p1))
{
Console.WriteLine($"{p1} doesn't match");
}
else
{
Console.WriteLine($"{p1} matches");
}
}
}
Output:
aaaa999999 matches
aaaa9999999 matches
aaaa99999999 doesn't match
aaa999999 doesn't match
Try it as DotNetFiddle
edited Jun 12 '18 at 13:43
Matt
15.3k766109
answered Jun 12 '18 at 13:11
kirti kant pareekkirti kant pareek
473
add a comment |
The following code is using a regular expression and checks 4 different patterns to test it, see output below:
using System;
using System.Text.RegularExpressions;
public class Program
{
public static void Main()
{
var p1 = "aaaa999999";
CheckMatch(p1);
p1 = "aaaa9999999";
CheckMatch(p1);
p1 = "aaaa99999999";
CheckMatch(p1);
p1 = "aaa999999";
CheckMatch(p1);
}
public static void CheckMatch(string p1)
{
var reg = new Regex(@"^w{4}d{6,7}$");
if (!reg.IsMatch(p1))
{
Console.WriteLine($"{p1} doesn't match");
}
else
{
Console.WriteLine($"{p1} matches");
}
}
}
Output:
aaaa999999 matches
aaaa9999999 matches
aaaa99999999 doesn't match
aaa999999 doesn't match
Try it as DotNetFiddle
edited Jun 12 '18 at 13:43
Matt
15.3k766109
answered Jun 12 '18 at 13:11
kirti kant pareekkirti kant pareek
473
add a comment |
The following code is using a regular expression and checks 4 different patterns to test it, see output below:
using System;
using System.Text.RegularExpressions;
public class Program
{
public static void Main()
{
var p1 = "aaaa999999";
CheckMatch(p1);
p1 = "aaaa9999999";
CheckMatch(p1);
p1 = "aaaa99999999";
CheckMatch(p1);
p1 = "aaa999999";
CheckMatch(p1);
}
public static void CheckMatch(string p1)
{
var reg = new Regex(@"^w{4}d{6,7}$");
if (!reg.IsMatch(p1))
{
Console.WriteLine($"{p1} doesn't match");
}
else
{
Console.WriteLine($"{p1} matches");
}
}
}
Output:
aaaa999999 matches
aaaa9999999 matches
aaaa99999999 doesn't match
aaa999999 doesn't match
Try it as DotNetFiddle
edited Jun 12 '18 at 13:43
Matt
15.3k766109
answered Jun 12 '18 at 13:11
kirti kant pareekkirti kant pareek
473
The following code is using a regular expression and checks 4 different patterns to test it, see output below:
using System;
using System.Text.RegularExpressions;
public class Program
{
public static void Main()
{
var p1 = "aaaa999999";
CheckMatch(p1);
p1 = "aaaa9999999";
CheckMatch(p1);
p1 = "aaaa99999999";
CheckMatch(p1);
p1 = "aaa999999";
CheckMatch(p1);
}
public static void CheckMatch(string p1)
{
var reg = new Regex(@"^w{4}d{6,7}$");
if (!reg.IsMatch(p1))
{
Console.WriteLine($"{p1} doesn't match");
}
else
{
Console.WriteLine($"{p1} matches");
}
}
}
Output:
aaaa999999 matches
aaaa9999999 matches
aaaa99999999 doesn't match
aaa999999 doesn't match
Try it as DotNetFiddle
edited Jun 12 '18 at 13:43
Matt
15.3k766109
answered Jun 12 '18 at 13:11
kirti kant pareekkirti kant pareek
473
edited Jun 12 '18 at 13:43
Matt
15.3k766109
edited Jun 12 '18 at 13:43
Matt
15.3k766109
edited Jun 12 '18 at 13:43
Matt
15.3k766109
15.3k766109
answered Jun 12 '18 at 13:11
kirti kant pareekkirti kant pareek
473
answered Jun 12 '18 at 13:11
kirti kant pareekkirti kant pareek
473
answered Jun 12 '18 at 13:11
kirti kant pareekkirti kant pareek
473
473
add a comment |
add a comment |
Your conditions give:
The first four characters must be alphanumeric:[A-Za-zd]{4}
Followed by 6 or 7 numeric values:d{6,7}
Put it together and anchor it:
^[A-Za-zd]{4}d{6,7}z
Altho that depends a bit how you define "alphanumeric". Also if you are using ignore case flag then you can remove the A-Z range from the expression.
answered Jan 6 '12 at 21:43
QtaxQtax
27.4k554100
add a comment |
Your conditions give:
The first four characters must be alphanumeric:[A-Za-zd]{4}
Followed by 6 or 7 numeric values:d{6,7}
Put it together and anchor it:
^[A-Za-zd]{4}d{6,7}z
Altho that depends a bit how you define "alphanumeric". Also if you are using ignore case flag then you can remove the A-Z range from the expression.
answered Jan 6 '12 at 21:43
QtaxQtax
27.4k554100
add a comment |
Your conditions give:
The first four characters must be alphanumeric:[A-Za-zd]{4}
Followed by 6 or 7 numeric values:d{6,7}
Put it together and anchor it:
^[A-Za-zd]{4}d{6,7}z
Altho that depends a bit how you define "alphanumeric". Also if you are using ignore case flag then you can remove the A-Z range from the expression.
answered Jan 6 '12 at 21:43
QtaxQtax
27.4k554100
Your conditions give:
The first four characters must be alphanumeric:[A-Za-zd]{4}
Followed by 6 or 7 numeric values:d{6,7}
Put it together and anchor it:
^[A-Za-zd]{4}d{6,7}z
Altho that depends a bit how you define "alphanumeric". Also if you are using ignore case flag then you can remove the A-Z range from the expression.
answered Jan 6 '12 at 21:43
QtaxQtax
27.4k554100
answered Jan 6 '12 at 21:43
QtaxQtax
27.4k554100
answered Jan 6 '12 at 21:43
QtaxQtax
27.4k554100
answered Jan 6 '12 at 21:43
QtaxQtax
27.4k554100
27.4k554100
add a comment |
add a comment |
Try the following pattern:
@"^[A-za-zd]{4}d{6,7}$"
answered Jan 6 '12 at 21:46
BernardBernard
7,37723030
add a comment |
Try the following pattern:
@"^[A-za-zd]{4}d{6,7}$"
answered Jan 6 '12 at 21:46
BernardBernard
7,37723030
add a comment |
Try the following pattern:
@"^[A-za-zd]{4}d{6,7}$"
answered Jan 6 '12 at 21:46
BernardBernard
7,37723030
Try the following pattern:
@"^[A-za-zd]{4}d{6,7}$"
answered Jan 6 '12 at 21:46
BernardBernard
7,37723030
answered Jan 6 '12 at 21:46
BernardBernard
7,37723030
answered Jan 6 '12 at 21:46
BernardBernard
7,37723030
answered Jan 6 '12 at 21:46
BernardBernard
7,37723030
7,37723030
add a comment |
add a comment |
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