Regex :: How To Write Regular Expression
Sep 14, 2010
My coworker needs me to write him a regular expression for his vb.net app.I do not know vb and he does not know regex.The regex he needs is:/.*web id: ?(d+).*/iBasically he needs to search a string for something like "web id: 345" or "web id:2534" and retrieve the ID.He took what I gave him above and was able to put this together:
Dim strPattern As String = ".*web id: ?(d+).*"
Dim strReplacement$ = "$1"
GetWebId$ = Regex.Replace(LCase$(strNote$), strPattern$, strReplacement$)
[code].....
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Sep 23, 2009
I want regular expression validator for my telephone field in VB.net. Telephone format should be (+)xx-(0)xxxx-xxxxxx ext xxxx (Optional) example my number would appear as 44-7966-591739 Screen would be formatted to show +44-(0)7966-591739 ext?
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Jan 31, 2011
I'm trying to type a regular expression that follows the following format: [URL] There are no special characters or numbers permitted for this criteria. I thought I had it down, but I'm a bit rusty with regular expressions and when I tested mine, it failed all across the boards. So far, my regular is expression is:
[Code]...
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May 21, 2009
ok, For the moment I have a string() where each element is in the structure of
[Code]...
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Feb 7, 2011
I'm trying to find the right RegEx to capture some (potentially) repeating data. I don't know how many times it will repeat. If I give an exanple of the data and what I want to capture can anyone point me in the right direction? It's the .Net regex engine (Visual Basic)
[Code]...
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Oct 14, 2010
Excel returns a reference of the form
=Sheet1!R14C1R22C71junk
("junk" won't normally be there, but I want to be sure that there's no extraneous text.)I would like to 'split' this into a VB array, where
a(0)="Sheet1"
a(1)="14"
a(2)="1"
[code]....
I'm sure it can be done easily with a regular expression, but I just can't get the hang of it.
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Jan 21, 2011
I need a regular expression that requires at least ONE digits and SIX maximum. I've worked out this, but neither of them seems to work. ^[0-9][0-9]?[0-9]?[0-9]?[0-9]?[0-9]?$ ^[0-999999]$
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Apr 24, 2012
It seems up until now I've never used Regex, nor even heard of it. But once I did I realized how extremely useful this is. Having said, it's been 2 days since I've began looking into constructing my own patterns. My most recent being for decimals. Is the pattern I provided below "proper"? and are there also any improvements I could be making for a more efficient patter, which would minimize any possibility of a loophole? [code] So for my use, this is doing what it's supposed to being doing under every test I can through at it. But do mind the 0. and .0, I have a function to normalize these as they are proper, I just pad the left and right accordingly. I found most regex questions asked here..and yes I am doing this in vb.net so it fits. If not, then feel free to move this post somewhere else better suited for the topic of discussion.
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Apr 26, 2012
Quick RegExp problem (i hope). I need to identify a sub string from any string based on a regular expression. For Example, take the following strings:
[Code]...
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Mar 15, 2011
regex - regular expression to check input on multiline textbox
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Apr 1, 2010
This is a related to a previous question I have asked here, see the link below for a brief description as to why I am trying to do this.Regular expression from font to span (size and colour) and back (VB.NET).Basically I need a regex replace function (or if this can be done in pure VB then that's fine) to convert all ul tags in a string to textindent tags, with a different attribute value for the first textindent tag.For example:
<ul>
<li>This is some text</li>
<li>This is some more text</li>[code].....
Basically I want the first ul tag to have no indenting, but all nested ul tags to have an indent of 20.
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Jun 18, 2009
I have written code to pull some data into a data table and do some data re-formatting. I need some help splitting some text into appropriate columns.
CASE 1
I have data formated like this that I need to split into 2 columns.
[Code]...
column is the first 11 characters That is easy.column 2 should contain all the text after the first 11 characters up to but not including the first number.The last column is all the text after column 2
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Mar 24, 2012
I know it may be quite easily for you. i have a text which contains 40 lines, I want to remove lines which starts with a constant text. check below data.
When I used (?mn)[+CMGL:].*($) it removes the whole text , when I use (?mn)[+CMGL:].*(
) , it only leaves the first line.
+CMGL: 0,1,,159
07910201956905F0440B910201532762F20008709021225282808
+CMGL: 1,1,,159
[Code]...
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Aug 22, 2011
I'm using Visual Basic 2010 Express to edit an XML file. I want to replace items that have (typically) non-zero floating point numbers with a single zero.
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Mar 4, 2010
I am pretty good with perl regular expressions but evidently I am at a loss on why this doesn't work.The code below stores "Person Test" in output variable.
im output As String
Dim userName As String = "Test, Person"
Dim re As New Regex("(w+),s(w+)", RegexOptions.Singleline)
output = re.Replace(userName, "$2 $1")
So why doesn't the following code store "#Test##Person#" in output variable.
Dim output As String
Dim userName As String = "Test, Person"
Dim re As New Regex("(w+),s(w+)")
For Each Match As Match In re.Matches(userName)
output &= "#" & Match.ToString & "#"
Next
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Jul 20, 2009
I'm trying to replace all the carriage return characters in a string obtained from a multi line text box in a Windows Form with the string ", <BR>" so that when I use the string in some HTML it displays correctly.
Function Blah(ByVal strInput As String) As String
Dim rexCR As Object
rexCR = CreateObject("VBScript.RegExp")
[code]....
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Aug 27, 2009
I am trying to separate numbers from a string which includes %,/,etc for eg (%2459348?:, or :2434545/%). How can I separate it, in VB.net
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Feb 7, 2012
I'm trying to parse csv file with VB.NET.csv files contains value like 0,"1,2,3",4 which splits in 5 instead of 3. There are many examples with other languages in Stockoverflow but I can't implement it in VB.NET.Here is my code so far but it doesn't work...
Dim t As String() = Regex.Split(str(i), ",(?=([^""]*""[^""]*"")*[^""]*$)")
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Jan 12, 2010
I have a vb.net class that cleans some html before emailing the results.
Here is a sample of some html I need to remove:
<div class="RemoveThis">
Blah blah blah<br />
Blah blah blah<br />
[Code]...
I am already using RegEx to do most of my work now. What would the RegEx expression look like to replace the block above with nothing?
I tried the following, but something is wrong:
'html has all of my text
html = Regex.Replace(html, "<div.*?class=""RemoveThis"">.*?</div>", "", RegexOptions.IgnoreCase)
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Nov 11, 2011
The following works in vb.net, and basically only allows characters on a standard US Keyboard. Any other character pasted gets deleted. I use the following regular expression code:
"[^A-Za-z0-9[{}]`~!@#$%^&*()_-+=\/:;'""<>,.|? ]", "")
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Oct 21, 2011
Regular Expression to count per words and characters in VB.Net. Here's my codes.
[Code]...
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Oct 7, 2011
I'm trying to create a regex which will match either one of the following [code] This regex is supposed to return all and any form of the function that is used.If match string were - FVAL(A,"B")+5 then match group should be FVAL(A,"B")
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May 19, 2009
I have the following regular expression for validating a file name:
^(([a-zA-Z]:|))?(((.)|(..)|(. %5D">^/:*?"|<>. |([^/:*?"|<>][^/:*?"|<>. ]))?))). %5D">^/:*?"|<>. |([^/:*?"|<>]*[^/:*?"|<>. ]))?$
I can get it to work in VB.NET but not C#. I can't figure out why it works in one but not the other.
[Code]...
As far as I can tell the patterns are identical in both languages with escaping. When I run the VB code I get a match. When I run the C# code I get nothing.
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Oct 14, 2010
I have just coded the below regular expression. I have a mini rich text editor on a web page (very similar to the one I am using to post this question) and I want to make use of a double asterisk to indicate which words/phrases should be wrapped in a strong tag. The aim is to allow the user to add pre-defined HTML elements without actually having to submit HTML.
[code...]
Maybe I am over-optimising this, but I want to know if this can be made more efficient?
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Feb 12, 2009
It is a little like a search and replace, I want to replace any string that contains any substring in parentheses with the same string but the words in parentheses colored RED: Eg
Take this text in TextBox1:
"The Prime Minister (that idiot from Scotland) made a speech today"
and convert to this text in RichTextBox1:
"The Prime Minister (that idiot from Scotland) made a speech today"
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May 6, 2012
I had a regular expression which parses out value.
[Code]...
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Oct 6, 2011
I am trying to use regular expression for extracting data from web page. but everytime i change the URL i need to change my regular expression for URL.
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Mar 24, 2010
I have the following function that I am using to remove the characters �4 and nulls from my xmlString but I can't find what do I need to change to avoid removing the from my ending tags. This is what I get when I run this function
<ARR>20080625<ARR><DEP>20110606<DEP><PCIID>626783<PCIID><NOPAX>1<NOPAX><TG><TG><HASPREV>FALSE<HASPREV><HASSUCC>FALSE<HASSUCC>
find out what do I need to change in my expression to keep the ending tag as </tag>
[Code]...
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May 17, 2011
I have a textbox which takes as input the email address. Do you have regular expression validator in vb.net so that I can check if '@' is present or not in the string
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Feb 1, 2012
I have a string (can be anything) and somewhere in the middle of the string there's a filename with the extension 'txt'. The filename can basically be anything, and any filename is correct, but with a certain exception.
If the filename ends with .part<number>.txt, the <number> can only be one of the following, 1, 01, 001, 0001.
Every other <number> is incorrect.
Match
.part1.txt
.Part001.txt
[Code].....
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