[RESOLVED] Regex - [key={0}]

[Techno]

Hi
im not great with regex. I need a regex to obtain everything after '=' in this:

[AttachImage=images/logo.png]

so everything after [AttachImage=

so I can obtain "images/logo.png"

what would the regex be? (strictly regex only please)

[danasegarane]

This will capture the images/logo.png]

Dim str As String = "[AttachImage=images/logo.png]"
Dim reg As New Regex("[^=]+$")
If reg.IsMatch(str) Then
	Dim capturevalue As String = reg.Match(str).Value
End If

and remove the last ] manually

[ForumAccount]

I see a few patterns for this based on how you want the result:

1. The key has to be 'AttachImage':
   

   string text = "[AttachImage=images/logo.png]";
   Regex regex = new Regex(@"^\[AttachImage\=(?<m>[^=\]]+)\]$");
   
   var match = regex.Match(text);
   if (match.Success)
       Console.WriteLine(match.Groups["m"].Value);

   Output:
   

   images/logo.png

2. You just want to match any text after a "=" and before a "]":
   

   string text = "[AttachImage=images/logo.png]";
   Regex regex = new Regex(@"(?<=\=)[^\]]+");
   
   var match = regex.Match(text);
   if (match.Success)
       Console.WriteLine(match.Value);

   Output:
   

   images/logo.png

3. You want both the key and value returned:
   

   string text = "[AttachImage=images/logo.png]";
   Regex regex = new Regex(@"^\[(?<k>[^\=]+)\=(?<v>[^\]]+)\]$");
   
   var match = regex.Match(text);
   
   if (match.Success)
   {
       Console.WriteLine("Key='{0}'", match.Groups["k"].Value);
       Console.WriteLine("Value='{0}'", match.Groups["v"].Value);
   }

   Output:
   

   Key='AttachImage'
   Value='images/logo.png'

[Techno]

great. thanks all

[Techno]

ok trying to implement it and not quite working.

im reading a txt file which contains for example.. an email template.

there are certain "reserved" areas where that area of text will be replaced with a value.

however the above does not appear to work. I have also added another thing I want to match.

string fileRead = "dear [title]. Blah blah [activation]. [AttachImage=images/companyLogo.jpg&cid:companyLogo]";

// perform replacements of [title] and [activation]

// now replace the attach image

Regex attachImgRegex = new Regex(@"^\[(?<k>[^\=]+)\=(?<v>[^\]]+)\&(?<cid>[^\:]]+)\]$");
var match = attachImgRegex.Match(fileRead);
if (match.Success)
{
   ...
}

This fails.

I do need the entire string returned ([AttachImage=images/companyLogo.jpg&cid:companyLogo]) in addition to each section (images/companyLogo.jpg, cid:companyLogo)

[ForumAccount]

Just to clarify, your string that you are trying to match can be inbetween a string with any content?

[Techno]

correct

[ForumAccount]

Remove the anchoring characters from the pattern, these are the ^ character and $ character at the beginning and end, respectively and try that.

[Techno]

Thanks! Almost there.
The problem now is that it does not exactly find that string pattern. it finds the others (which I dont need!) like:

[Title]

then when doing a match.Groups["k"].Value I get:

title]. Blah blah [activation]. "

[Techno]

let me make it clear (sorry!)

lets use this:

\[AttachImage\=(?<m>[^=\]]+)\]


I only want to match the key "AttachImage".

I want a slight tweak now where I want to match this instead:

[AttachImage=somePath/logo.jpg&cid:Test]

so it returns me: somePath/logo.jpg AND also: cid:Test
where the key IS AttachImage

I may have several of these in a single string... so want to be sure I can iterate through each one and replace with what I need to replace the original string with

[Techno]

got it...

System.Text.RegularExpressions.MatchCollection attachImgRegex = System.Text.RegularExpressions.Regex.Matches(emailTemplate, @"\[AttachImage\=(?<m>[^=\]]+)\&cid:(?<o>[^=\]]+)\]");
            

            foreach (System.Text.RegularExpressions.Match currentMatch in attachImgRegex)
            {
             }

[ForumAccount]

Is this resolved?

[Techno]

yup.. will mark it as that