Find Substring With Regular Expressions?

Mar 27, 2011

i take the text of the html of a site and want to select a substring of the whole text. the text is something like this

[Code]....

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[Code]....

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I applied regular expression validator on date of birth and Missing date for a missing person.  the missing date should be greater than the date of birth . I applied compare vallidator but it is not working properly. it comparing day of date of birth with day of missing date, both months and years...

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I am getting ready to just write my own, but I have a need for some regular expressions that will validate strings to make sure they are in an acceptable format to be inserted/updated into a database field. I figure it may just be to find a list of them someone has already posted somewhere and just use those.

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Aug 10, 2012

Code to read the span having the particular class name and assign to match collection.

I am having a set of html tags.

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Jan 25, 2011

I am trying to find a way to limit the inputs on a webpage to a variety of different sequences, and although I have worked through the regular expression library, I am still confused on how to allow decimal places and a maximum value. I initially used rangevalidators, but as you know, these only limit the inputs to a range, and have no control over the decimal places entered. A variety of limits i have been asked to implement are:

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Apr 25, 2010

In the "Regular Expression Editor" dialog in VS 2008 ( or 2005 for this matter ) ,

there is a list of "standard expressions" like :

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And of course there is an option to select a "Custom" and then enter your own regular expression.

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I don't want to enter it every time by selecting a custom value .

I want my developers in the team available items for them to choose.

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I've found some question about it on the web - and the answer given is that it's not possible .

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how to find and replace substring in select query

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Sep 22, 2010

I want to find a substring (email) in a large text using Regex.

just want to return the first valid email that is found from the input text:

example:

string inputString = "Our email is myname@ourcompany.com.

desired output: myname@ourcompany.com

this is the Regex pattern i've used: ^[A-Z0-9._%+-]+@[A-Z0-9.-]+.[A-Z]{2,4}$

- is this pattern correct?

Code:

private static void DumpHRefs(string inputString)
{
Match m;
string HRefPattern = @"^[A-Z0-9._%+-]+@[A-Z0-9.-]+.[A-Z]{2,4}$";
m = Regex.Match(inputString, HRefPattern,
RegexOptions.IgnoreCase | RegexOptions.Compiled);
while (m.Success)
{
Console.WriteLine("Found email " + m.Groups[1] + " at ".......

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Sep 30, 2010

I have a ListBox that contains userNames which is inputted by a user during run time. This number of items in the ListBox is dependent on the user's input. These userNames will then be used in a Lambda expression like this:

var vHandleResult = vHandleResult.Where(a => a.UserName.Contains("userName"));

This works fine when there is only 1 user in the ListBox but doesn't produce the correct results when there are multiple items in the listBox. I tried manually creating the expression which should be written as this:

var vHandleResult = vHandleResult.Where(a => a.UserName.Contains("userName1") || a.UserName.Contains("userName2") || a.UserName.Contains("userName3") || a.UserName.Contains("userName4"));

I tried forming the "a.UserName.Contains("userName") expression as a string which is dependent on the number of the items (using foreach) and then just plug in the resulting string in the expression but it seems that it doesnt accept string as an expression.

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Feb 5, 2010

I need to pull a SubString from a Linq Datasource, but can't use INTs per .SubString(int, int) I have strings such as xxxx.xxxx.xxxxx.AAAA.xxxx.xxxx.xxxx.xxx and I need to pull AAAA out. the preceeding x's will be varying lengths, so I can't use a static int. What I do know is that there will be a static number of periods (.) leading up to the AAAA. I can't figure out how to use the SubSting with characters rather than indexs. This is what I have so far:

[Code]....

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C# - Using String.Format To Build Regular Expressions: "Input String Was Not In A Correct Format"

Mar 7, 2011

I'm bulding document-from-template engine. At certain points I need to match on Reg Exp groups and replace template text with content from a db.

I 'hardcoded' my RegExp initially, doing something like: Regex r = new Regex(@"{DocSectionToggle::(?<ColumnName>w+)::(?<ResponseValue>.+)}[[(?<SectionContent>.+)]]", RegexOptions.Multiline);

it does group capture, so the syntax isn't the prettiest.

Just to make things neater and because I want' to keep the patterns in web.config or elsewhere, I've 'evolved' algorithm to something like:

[code]...

But I'm getting an error: 'Input string was not in correct format'.

Is this a limitation of string.Format(...)?

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Mar 3, 2010

I have a string which contains a group of html tags. In those group of tags How can I find the value of a 'href' attrubute of a hyperlink tag using Regular expression.The expression I have tried is as follows:

string pattern = "^*href\S*=\S*["|'][^<>+]*["|']$";

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The following is a line of huge .txt file and i am reading it line by line. I need the value of second column. In this line, I need to extract 'C9006'.

Mr ABC|C9006|The white field,
ON|493-493-4939|493-493-4939|YR|Inactive

Note : The delimiter char is pipe sign '|'. The length of second column is not consistent.

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Need to substring value from DropDownList from position 1 till I reach the first blank character

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