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Regular expression that extracts sub-strings that are in some specified format not working for all possibilities

Continuing from my previous question here: Need regular expression that extracts sub-strings that are in some specified format. The solution that was suggested there solved my problem but not completely. I came across another string sample from which the the sub-strings in following format must be extracted:
#[any character here].[any character here].[any character here]....... and so on.
For example, I have a string:
My location is #[XYZ Continent].[XYZ Country].[XYZ State].[XYZ City].[XYZ Street] on the map. You are most welcome there anytime.
Previous solution is working fine on this string. Output:
#[XYZ Continent].[XYZ Country].[XYZ State].[XYZ City].[XYZ Street]
But that solution only checks for + and whitespace outside the sub-string(CLICK HERE TO SEE DEMO). But what I want is that the right and left of the sub-string must be ignored no matter if it is alphnumeric, whitespace or another special character. For example:
Hello#[XYZ Continent1].[XYZ Country1]+#[XYZ Continent2].[XYZ Country2]1#[XYZ Continent3].[XYZ Country3]there.
The output must be:
#[XYZ Continent1].[XYZ Country1]
#[XYZ Continent2].[XYZ Country2]
#[XYZ Continent3].[XYZ Country3]
Solution from previous question:
(?<!\w)#(\w+\b|\[.*?\](?=[\s+]|$))

You can use the following:
(?<!\w)#((?:\[[^\]]+\]\.?)+)
See DEMO

Regex c# to jquery implementation

I have this regex on my asp.net mvc3 application:
Regex pattern = new Regex(#"^(?!.*(.)\1\1)(?=.*\d)(?=.*[a-z])(?=.*[A-Z])[0-9a-zA-Z]{8,20}$");
I needed to implement this with jquery due to some requirements with something like this:
password.match(/(.*(?=.*\d)(?=.*[a-z])(?=.*[A-Z])[0-9a-zA-Z]/))
This is working. It will detect if 1 uppercase, 1 lowercase and 1 number is present on the password. However , i also have need to detect if 3 consecutive letter is present (eg: aaa, bbb).
With my regex on c# , it is working with the help of:
/(.)\1\1/
But I can't make it work on password.match(/(.)\1\1/)
Did I missed something here? Thanks in advance!

I've just copied your C# regex and tried in JavaScript console and it works great:
"waweEEad2".match(/^(?!.*(.)\1\1)(?=.*\d)(?=.*[a-z])(?=.*[A-Z])[0-9a-zA-Z]{8,20}$/)
returns ["waweEEad2", undefined] and
"waweEEEad2".match(/^(?!.*(.)\1\1)(?=.*\d)(?=.*[a-z])(?=.*[A-Z])[0-9a-zA-Z]{8,20}$/)
returns null.

C# Regex does not work in Javascript, MVC4, Custom RegularExpressionAttribute, IClientValidatable

I have a custom regular expression attribute which implements IClientValidate so that I can use it with unobtrustive validate.
When I run it I get the following error in FireBug
SyntaxError: Invalid quantifier
match = new RegExp(params).exec(value);
It obviously does not like the regular expression that is passed to it, it is valid in C#. I can't seem to work out what I need to do to get it to be valid in JavaScript.
The regex is
^(?i)([A-PR-UWYZ0-9][A-HK-Y0-9][AEHMNPRTVXY0-9]?[ABEHMNPRVWXY0-9]?\s?[0-9][ABD-HJLN-UW-Z]{2})$

The JavaScript regex flavor is extremely limited compared to .NET (C#). One of the many features it doesn't support is inline modifiers of the form (?i)regex or (?i:regex). However, because you're using the new RegExp(params) constructor, you should be able to pass the modifier as the second parameter:
"^[A-PR-UWYZ0-9][A-HK-Y0-9][AEHMNPRTVXY0-9]?[ABEHMNPRVWXY0-9]?\s?[0-9][ABD-HJLN-UW-Z]{2}$",
"i"

Replace (?i) by i modifier:
var patt=/^([A-PR-UWYZ0-9][A-HK-Y0-9][AEHMNPRTVXY0-9]?[ABEHMNPRVWXY0-9]?\s?[0-9][ABD-HJLN-UW-Z]{2})$/i

When i run your regex in this : http://regexpal.com/
I get error on this part : (?i)
Rexegpal is a JavaScript regular expression tester.
So if you can get it to work here you can then apply it in your code.
Perhaps you have some example string to try with?

Issue regarding Regular Expression

I want to match all "the act" outside the tags in the *.sgm that my professor gave me, I know that we can use XML parser, but our goal is to learn REGEX purely.
this is my current Regex:
(?<![""=<\/])\bthe act\b(?!\>)
The problem is with this example:
<ptext>Test example the act example</ptext>
My regex matches "the act". And that is correct.
But if this example now I will try:
<ptext tags="Test the act">Example the act</ptext>
The regex will match (2) two "the act", the one that is inside the tag attribute and the one outside, I dont want to match all the act inside the tag, how can I do that? thanks.

Maybe this will work: (?<=\>[^>]*)the act(?=[^<]*\<) It should work if the regex engine allows variable length look behind, I think c#'s engine does.

Regex Regular expression in c#

We have implemented the invocation of brill tagger from our c# code. We just neede to know what is the correct Regex regular expression for eliminating all from a string, but jst keep a-z,A-Z, full stop and comma. We tried [^a-zA-Z\.\,] on the online regular expression tester and it is giving the correct result, but when implemented in C#, it is not working properly. We also tried several other combinations but we are not getting the correct result.
This is the format in which we are writing:
strFileContent = Regex.Replace(strFileContent, #"[^a-zA-Z\.\,]", "");
but we are not getting the desired output. what is wrong??

Regex.Replace(yourString, #"[^a-z\.\,]", string.Empty, RegexOptions.IgnoreCase)
EDIT: I can't see anything wrong with what you are doing, my answer is exactly the same. I tested both in LINQPad and they both return the same result.