How to determinate if an character in a string

[ad]

I want to determinate if there are alphabets in a string. (not all number)
How can I do?

 

[Jon Shemitz]

I want to determinate if there are alphabets in a string. (not all number)

How can I do?

If you really want to simply find if a string has non-numeric
characters, you can do

Regex.IsMatch("[^0-9]", StringToTest);

 

[Dave Sexton]

Hi Jon,

(Arguments are not in the correct order

And just in case the OP wants to ensure that only alpha characters appear in
the entire string, excluding all white-space, numbers and symbols (but
allowing a zero-length string):

bool alphaOnly = Regex.IsMatch(@"^\p{L}*$", str);

--
Dave Sexton

I want to determinate if there are alphabets in a string. (not all
number)
How can I do?

If you really want to simply find if a string has non-numeric
characters, you can do

Regex.IsMatch("[^0-9]", StringToTest);

--

.NET 2.0 for Delphi Programmers
www.midnightbeach.com/.net
What you need to know.

 

[Dave Sexton]

.... and I put the arguments in the wrong order as well

bool alphaOnly = Regex.IsMatch(str, @"^\p{L}*$");

--
Dave Sexton

Hi Jon,

(Arguments are not in the correct order

And just in case the OP wants to ensure that only alpha characters appear
in the entire string, excluding all white-space, numbers and symbols (but
allowing a zero-length string):

bool alphaOnly = Regex.IsMatch(@"^\p{L}*$", str);

--
Dave Sexton

I want to determinate if there are alphabets in a string. (not all
number)
How can I do?

If you really want to simply find if a string has non-numeric
characters, you can do

Regex.IsMatch("[^0-9]", StringToTest);

--

.NET 2.0 for Delphi Programmers
www.midnightbeach.com/.net
What you need to know.

 

[Jon Shemitz]

(Arguments are not in the correct order

Ooops. Yesterday was NOT my day for posting. ;-)

 

[Dave Sexton]

Hi,

I know how you feel

--
Dave Sexton

Ooops. Yesterday was NOT my day for posting. ;-)

--

.NET 2.0 for Delphi Programmers
www.midnightbeach.com/.net
What you need to know.

 

[ad]

If I want to determinate if there are 2 alphabets in a string at least
"12ab34", "123a5bc", "a123c4" is ok, but "2345", 2a35" is not ok.
How can I do?

 

[Dave Sexton]

Hi,

You can use a Regular Expression, as Jon posted originally, but with a
different pattern.

"Regular Expression Language Elements"
http://msdn2.microsoft.com/en-us/library/az24scfc.aspx

To match a string containing at least 2 characters of the alphabet at any
position, you can use the following expression:

bool atLeast2Alpha = Regex.IsMatch(input, @"\p{L}.*\p{L}");

Add a using directive at the top of your code file:

using System.Text.RegularExpressions;