I want to extract an RTMP link from a website and has so far managed to find the line where it's located:
string line = GetLine(innerHTML, "turbo:");
// The string line now contains something like this:
// turbo: 'rtmp://fcs21-1.somewebsite.com/reflect/2996910732;0',
Match match = Regex.Match(line, #"turbo: '(rtmp://[*]+);0',$",
RegexOptions.IgnoreCase);
string key;
if (match.Success)
key = match.Groups[1].Value;
There aren't any matches. What I would like to extract from this line:
turbo: 'rtmp://fcs21-1.somewebsite.com/reflect/2996910732;0',
is this piece:
rtmp://fcs21-1.somewebsite.com/reflect/2996910732
What am I missing in the Regex?
Your character class - [*] matches just a *, with quantifier +, it matches 1 or more *, nothing else. Clearly it won't match your string.
I guess you meant to use .* instead, which matches 0 or more occurrences of any character but \n.
Try changing your regex to:
"turbo: '(rtmp://.*);0',$"
or even better, given your text, and what you want to extract, you can simply use:
"turbo: '([^;]*);0',$
[*] matches only *. To match any character, prefer .. (Re
(actually, . fails to match a newline. If a newline may appear, prefer something to the effect of (.|\n) -- note that the backslash will need to be escaped.)
Try this:
Match match = Regex.Match(line, #"^turbo: '(rtmp://[^;]+);0',$", RegexOptions.IgnoreCase);
This will take into account the start of the string with the ^ symbol, and the matching selection will match anything that isn't a ; all the way up to an actual ;.
Related
I want to spilt Alphanumeric with two part Alpha and numeric with special character like -
string mystring = "1- Any Thing"
I want to store like:
numberPart = 1
alphaPart = Any Thing
For this i am using Regex
Regex re = new Regex(#"([a-zA-Z]+)(\d+)");
Match result = re.Match("1- Any Thing");
string alphaPart = result.Groups[1].Value;
string numberPart = result.Groups[2].Value;
If there is no space in between string its working fine but space and symbol both alphaPart and numberPart showing null where i am doing wrong Might be Regex expression is wrong for this type of filter please suggest me on same
Try this:
(\d+)(?:[^\w]+)?([a-zA-Z\s]+)
Demo
Explanation:
(\d+) - capture one or more digit
[^\w]+ match anything except alphabets
? this tell that anything between word and number can appear or not(when not space is between them)
[a-zA-Z\s]+ match alphabets(even if between them have spaces)
Start of string is matched with ^.
Digits are matched with \d+.
Any non-alphanumeric characters are matched with [\W_] or \W.
Anything is matched with .*.
Use
(?s)^(\d+)\W*(.*)
See proof
(?s) makes . match linebreaks. So, it literally matches everything.
My Code is like this:
string currentPageSlug = "securities/EBR#03L$ZZZ";
string patern= #"securities/(\w+)[\#\$]";
string res = Regex.Match(currentPageSlug, patern).Value;
Console.WriteLine(res);
which gives me this result:
securities/EBR#
but I want to get:
securities/EBR#03L$ZZZ
whole word including all special characters (# and $ and maybe others too)
my regex pattern does not seem to work.
Your regex matches words followed by a single special character. You need to include [#$] in the repeating construct +, like this:
string patern= #"securities/((?:\w|[#$])+)";
Note that since # and $ are used inside a character class, it is not necessary to escape them with a backslash \.
From the below mentioned input string, I want to extract the values specified in {} for s:ds field. I have attached my regex pattern. Now the pattern I used for testing on http://www.regexr.com/ is:
s:ds=\\\"({[\d\w]{8}\-([\d\w]{4}\-){3}[\d\w]{12}})\\\"
and it works absolutely fine.
But the same in C# code does not work. I have also added \\ instead of \ for c# code and replaced \" with \"" . Let me know if Im doing something wrong. Below is the code snippet.
string inputString is "s:ds=\"{46C01EB7-6D43-4E2A-9267-608DE8AFA311}\" s:ds=\"{37BA4BA0-581C-40DC-A542-FFD9E99BC345}\" s:id=\"{C091E71D-4817-49BC-B120-56CE88BC52C2}\"";
string regex = #"s:ds=\\\""({[\d\w]{8}\-(?:[\d\w]{4}\-){3}[\d\w]{12}})\\\""";
MatchCollection matchCollection = Regex.Matches(layoutField, regex);
if (matchCollection.Count > 1)
{
Log.Info("Collection Found.", this);
}
If you only watch to match the values...
You should be able to just use ([\d\w]{8}\-([\d\w]{4}\-){3}[\d\w]{12}) for your expression if you only want to match the withing your gullwing braces :
string input = "s:ds=\"{46C01EB7-6D43-4E2A-9267-608DE8AFA311} ...";
// Use the following expression to just match your GUID values
string regex = #"([\d\w]{8}\-([\d\w]{4}\-){3}[\d\w]{12})";
// Store your matches
MatchCollection matchCollection = Regex.Matches(input, regex);
// Iterate through each one
foreach(var match in matchCollection)
{
// Output the match
Console.WriteLine("Collection Found : {0}", match);
}
You can see a working example of this in action here and example output demonstrated below :
If you want to only match those following s:ds...
If you only want to capture the values for s:ds sections, you could consider appending (?<=(s:ds=""{)) to the front of your expression, which would be a look-behind that would only match values that were preceded by "s:ds={" :
string regex = #"(?<=(s:ds=""{))([\d\w]{8}\-([\d\w]{4}\-){3}[\d\w]{12})";
You can see an example of this approach here and demonstrated below (notice it doesn't match the s:id element :
Another Consideration
Currently you are using \w to match "word" characters within your expression and while this might work for your uses, it will match all digits \d, letters a-zA-z and underscores _. It's unlikely that you would need some of these, so you may want to consider revising your character sets to use just what you would expect like [A-Z\d] to only match uppercase letters and numbers or [0-9A-Fa-f] if you are only expected GUID values (e.g. hex).
Looks like you might be over-escaping.
Give this a shot:
#"s:ds=\""({[\d\w]{8}\-([\d\w]{4}\-){3}[\d\w]{12}})\"""
This is something simple but I cannot figure this out. I want to find a substring with this regex. It will mach "M4N 3M5", but doesn't match the below :
const string text = "asdf M4N 3M5 adsf";
Regex regex = new Regex(#"^[ABCEGHJKLMNPRSTVXY]{1}\d{1}[A-Z]{1} *\d{1}[A-Z]{1}\d{1}$", RegexOptions.None);
Match match = regex.Match(text);
string value = match.Value;
Try removing ^ and $:
Regex regex = new Regex(#"[ABCEGHJKLMNPRSTVXY]{1}\d{1}[A-Z]{1} *\d{1}[A-Z]{1}\d{1}", RegexOptions.None);
^ : The match must start at the beginning of the string or line.
$ : The match must occur at the end of the string or before \n at the
end of the line or string.
If you want to match only in word boundaries you can use \b as suggested by Mike Strobel:
Regex regex = new Regex(#"\b[ABCEGHJKLMNPRSTVXY]{1}\d{1}[A-Z]{1} *\d{1}[A-Z]{1}\d{1}\b", RegexOptions.None);
I know this question has been answered but i have noticed two thing in your pattern which i want to highlight:
No need to mention the single instance of any token.
For example: (Notice the missing {1})
\d{1} = \d
[A-Z]{1} = [A-Z]
Also I won't recommend you to enter a <space>in your pattern use '\s' instead because if mistakenly a backspace is pressed you might not
be able to figure out the mistake and running code will stop
working.
Personally, for this case i would recommend you to use \b since it is best fit here.
I need some advice. Suppose I have the following string: Read Variable
I want to find all pieces of text like this in a string and make all of them like the following:Variable = MessageBox.Show. So as aditional examples:
"Read Dog" --> "Dog = MessageBox.Show"
"Read Cat" --> "Cat = MessageBox.Show"
Can you help me? I need a fast advice using RegEx in C#. I think it is a job involving wildcards, but I do not know how to use them very well... Also, I need this for a school project tomorrow... Thanks!
Edit: This is what I have done so far and it does not work: Regex.Replace(String, "Read ", " = Messagebox.Show").
You can do this
string ns= Regex.Replace(yourString,"Read\s+(.*?)(?:\s|$)","$1 = MessageBox.Show");
\s+ matches 1 to many space characters
(.*?)(?:\s|$) matches 0 to many characters till the first space (i.e \s) or till the end of the string is reached(i.e $)
$1 represents the first captured group i.e (.*?)
You might want to clarify your question... but here goes:
If you want to match the next word after "Read " in regex, use Read (\w*) where \w is the word character class and * is the greedy match operator.
If you want to match everything after "Read " in regex, use Read (.*)$ where . will match all characters and $ means end of line.
With either regex, you can use a replace of $1 = MessageBox.Show as $1 will reference the first matched group (which was denoted by the parenthesis).
Complete code:
replacedString = Regex.Replace(inStr, #"Read (.*)$", "$1 = MessageBox.Show");
The problem with your attempt is, that it cannot know that the replacement string should be inserted after your variable. Let's assume that valid variable names contain letters, digits and underscores (which can be conveniently matched with \w). That means, any other character ends the variable name. Then you could match the variable name, capture it (using parentheses) and put it in the replacement string with $1:
output = Regex.Replace(input, #"Read\s+(\w+)", "$1 = MessageBox.Show");
Note that \s+ matches one or more arbitrary whitespace characters. \w+ matches one or more letters, digits and underscores. If you want to restrict variable names to letters only, this is the place to change it:
output = Regex.Replace(input, #"Read\s+([a-zA-Z]+)", "$1 = MessageBox.Show");
Here is a good tutorial.
Finally note, that in C# it is advisable to write regular expressions as verbatim strings (#"..."). Otherwise, you will have to double escape everything, so that the backslashes get through to the regex engine, and that really lessens the readability of the regex.