I am using the following regular expression to find words and phrases in a document. (Have to use regular expression and have to use \b.)
\b (zoo|a & b|dummy)\b
When I try to find matches in the following string
going to the zoo with a & b
a & b doesn't get matched. However, if I remove the leading and following space from the string and regex, making both a&b, it matches, but I do need to those spaces.
Use \s for spaces
string strRegex = #"\b\s(zoo|a\s&\sb|dummy)\b";
Regex myRegex = new Regex(strRegex, RegexOptions.None);
string strTargetString = #"going to the zoo with a & b";
foreach (Match myMatch in myRegex.Matches(strTargetString))
{
Console.WriteLine(myMatch);
}
Related
Please help me to split string with "," having "desc,a" as single item in result.
string s="\"desc,a\",True,True,False,True,0,1,red,1,1,"
Thanks in Advance.
You can use a regular expression to match items with and without quotation marks:
string[] items =
Regex.Matches(s, #"""[^""]*""|[^,]+")
.Cast<Match>()
.Select(x => x.Value)
.ToArray();
Explanation:
""[^""]*"" - matches an item with quotation marks
(quot, zero or more non-quot character, quot)
| - or operator
[^,]+ - matches an item without quotation marks
(one or more characters other than comma)
I would suggest you to take a look at regular expressions:
http://msdn.microsoft.com/en-us/library/az24scfc.aspx
I'm using a linq query where i do something liike this:
viewModel.REGISTRATIONGRPS = (From a In db.TABLEA
Select New SubViewModel With {
.SOMEVALUE1 = a.SOMEVALUE1,
...
...
.SOMEVALUE2 = If(commaseparatedstring.Contains(a.SOMEVALUE1), True, False)
}).ToList()
Now my Problem is that this does'n search for words but for substrings so for example:
commaseparatedstring = "EWM,KI,KP"
SOMEVALUE1 = "EW"
It returns true because it's contained in EWM?
What i would need is to find words (not containing substrings) in the comma separated string!
Option 1: Regular Expressions
Regex.IsMatch(commaseparatedstring, #"\b" + Regex.Escape(a.SOMEVALUE1) + #"\b")
The \b parts are called "word boundaries" and tell the regex engine that you are looking for a "full word". The Regex.Escape(...) ensures that the regex engine will not try to interpret "special characters" in the text you are trying to match. For example, if you are trying to match "one+two", the Regex.Escape method will return "one\+two".
Also, be sure to include the System.Text.RegularExpressions at the top of your code file.
See Regex.IsMatch Method (String, String) on MSDN for more information.
Option 2: Split the String
You could also try splitting the string which would be a bit simpler, though probably less efficient.
commaseparatedstring.Split(new Char[] { ',' }).Contains( a.SOMEVALUE1 )
what about:
- separating the commaseparatedstring by comma
- calling equals() on each substring instead of contains() on whole thing?
.SOMEVALUE2 = If(commaseparatedstring.Split(',').Contains(a.SOMEVALUE1), True, False)
I have a asp.net control that is using a regular expression to validate the users input for first name and last name. It works for up to 40 characters...and I think by the looks of the expression it also allows ' for names like O'Donald and maybe hypenated names too.
ValidationExpression="^[a-zA-Z''-'\s]{1,40}$"
My problem is with accented names/characters e.g. Spanish and French names that may contain for example ñ are not allowed. Does anyone know how to modify my expression to take this into account?
You want
\p{L}: any kind of letter from any language.
From regular-expressions.info
\p{L} or \pL is every character in the unicode table that has the property "letter". So it will match every letter from the unicode table.
You can use this within your character class like this
ValidationExpression="^[\p{L}''-'\s]{1,40}$"
Working C# test:
String[] words = { "O'Conner", "Smith", "Müller", "fooñ", "Fooobar12" };
foreach (String s in words) {
Match word = Regex.Match(s, #"
^ # Match the start of the string
[\p{L}''-'\s]{1,40}
$ # Match the end of the string
", RegexOptions.IgnorePatternWhitespace);
if (word.Success) {
Console.WriteLine(s + ": valid");
}
else {
Console.WriteLine(s + ": invalid");
}
}
Console.ReadLine();
I am trying to write a regular expression that doesn't allow single or double quotes in a string (could be single line or multiline string). Based on my last question, I wrote like this ^(?:(?!"|').)*$, but it is not working. Really appreciate if anybody could help me out here.
Just use a character class that excludes quotes:
^[^'"]*$
(Within the [] character class specifier, the ^ prefix inverts the specification, so [^'"] means any character that isn't a ' or ".)
Just use a regex that matches for quotes, and then negate the match result:
var regex = new Regex("\"|'");
bool noQuotes = !regex.IsMatch("My string without quotes");
Try this:
string myStr = "foo'baa";
bool HasQuotes = myStr.Contains("'") || myStr.Contains("\""); //faster solution , I think.
bool HasQuotes2 = Regex.IsMatch(myStr, "['\"]");
if (!HasQuotes)
{
//not has quotes..
}
This regular expression below, allows alphanumeric and all special characters except quotes(' and "")
#"^[a-zA-Z-0-9~+:;,/#&_#*%$!()\[\] ]*$"
You can use it like
[RegularExpression(#"^[a-zA-Z-0-9~+:;,/#&_#*%$!()**\[\]** ]*$", ErrorMessage = "Should not allow quotes")]
here use escape sequence() for []. Since its not showing in this post
I want to identify special characters and remove that special characters from my string or a word
for example
O'neil - i want to remove (') from this word.
Muñoz, A. Patrick - i want to remove above character of n (ñ)
similarly i want to remove all special characters from my strings.
I want to do this in asp
How can i do this
You could use a regular expression and then run the following. You'll need to change the regular expression accordingly.
Const PATTERN = "\W"
Dim objRegEx
Dim strReplacedString : strReplacedString = ""
Set objRegEx= New RegExp
objRegEx.Pattern = PATTERN
objRegEx.IgnoreCase = True
objRegEx.Global = True
strReplacedString = objRegEx.Replace(strToProcess,"")
Set objRegEx = Nothing