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Regular expression generation for a string [closed]

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I want to create a regular expression to check the following string pattern, I tried following these tutorials but it's still confusing. Any help is appreciated.
Type: In Folder
(T or t)ype(spaces or no space):(spaces or no space)(i or I)n(spaces or multiple space)(f or F)older

So following your desired pattern at the end of your question:
(t|T)ype\s*:\s*(i|I)n\s*(f|F)older
The above pattern should match your string. Mind you, \s* is zero to unlimited spaces, which means it would match on the string you provided even if there were no spaces present; if there will always be at least one space present, you can replace them with \s+
Hope this helps!

(T|t)ype\s*:\s*(I|i)n\s*(f|F)older

Regex to remove c# [closed]

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I want to remove some string from regex in c#.
I have a string
000603ABC140702-005051-I-FILL200-NNYYNY180319-142110-A2002.zip
From this I want to remove those strings
140702
142110
And I want a result as
000603ABC-005051-I-FILL200-NNYYNY180319--A2002.zip
How can I do that in regex?

You can use the Regex.Replace method (https://msdn.microsoft.com/en-us/library/xwewhkd1(v=vs.110).aspx).
var regex = new Regex("(140702)|(142110)");
var result = regex.Replace("000603ABC140702-005051-I-FILL200-NNYYNY180319-142110-A2002.zip", "");
Although, as already stated by #CompuChip, String.Replace would probably be more efficient in this case. There's a discussion of various methods of replacing substrings and their efficiency at https://blogs.msdn.microsoft.com/debuggingtoolbox/2008/04/02/comparing-regex-replace-string-replace-and-stringbuilder-replace-which-has-better-performance/.

Regex.Replace hashtags but ignore apostrophe ( [closed]

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I have the following C# code to replace hashtags in HTML strings and it works good but it also replaces apostrophes since they encode as '
The code replaces the #39 with the URL.
Such as Hamburger's is now converted to Hamburger&<a href\"Default.aspx?search=39">39</a>s
How can I ignore apostrophes for the regex replace?
public String ReplaceHashTags(string strContent)
{
string strHashtags = #"#(\w+)";
strContent = Regex.Replace(strContent, strHashtags,
"$1");
return strContent;
}

You can tell the Regex to not match if the # is preceded by &:
var strHashtagPattern = #"(?<!&)#(\w+)";
If you want to exclude all possible special character escapes, a negative lookahead may be better:
var strHashtagPattern = #"(?!(?<=&)#[\w\d]+;)#(\w+)";

Exclude match in Regular Expression c# [closed]

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I would like to exclude a specific string when it is contained in an expression:
Example:
myurl.htm = exclude
myurl = include
I tried this one : ([a-z0-9]+)(?!.htm)
But looks like it doesn't work.

Try the following:
([a-z0-9]+)(?!^\.htm)
You had two errors in your expression:
You have to escape the dot . with a backslash because it means "matches any character (except newline)" unescaped.
You have to add a ^ to prevent cutting of the last character.
You can test your expression on this website: https://regex101.com/

Regular expression to search for files and folders [closed]

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Help write a regular expression to search for files and folders,
searches for a given mask. In the mask, you can use "*"
(any characters in any number), and the "?" (one symbol).

Here shows you how to use regex in C#.
You could always just loop the directory that you're looking in and check the file names instead of making a regex. (You'll need to use System.IO)
Perhaps something like this?
string [] fileEntries = Directory.GetFiles(targetDirectory);
Regex regex = new Regex("target file name");
Match match = regex.Match(string.Join(" ", fileEntries););
if (match.Success)
{
Console.WriteLine(match.Value);
}