I have a text such as

string text = "Hi [img-2] tst[img-3] test ttteessstt grawr[img-1-800]tet";

I want to find img tags in the text and get their id (second value) and possibly the third value if it exists.

string text = "Hi [img-2] tst[img-3] test ttteessstt grawr[img-1-800]tet";

var th = new TagHandler(null);
var res = th.FindImgTags(text);

foreach(var tag in res)
    Debug.WriteLine(string.Join(", ", tag.Tag, tag.Id, tag.Width));

The above code outputs this:

[img-2], 2, 0
[img-3], 3, 0
[img-1-800], 1, 800

This is my "find tags code". Its crude but gets the job done... Any suggestions on how to make this less verbose / brute

public List<ImgReplaceItem> FindImgTags(string data)
    var result = new List<ImgReplaceItem>();

    var pieces = data.Split(new string[] { "[img-" }, StringSplitOptions.RemoveEmptyEntries);
    foreach (var item in pieces)
        if (item.Contains(']'))
            var backend = item.Split(new char[] { ']' }, StringSplitOptions.RemoveEmptyEntries);
            var dataInside = backend[0];

            var r = new ImgReplaceItem();
            r.Tag = "[img-" + dataInside + "]";
            var pid = -1;
            if (dataInside.Contains('-'))
                var widthParts = dataInside.Split(new char[] { '-' }, StringSplitOptions.RemoveEmptyEntries);
                int.TryParse(widthParts[0], out pid);

                if (widthParts.Count() > 1)
                    var width = -1;
                    int.TryParse(widthParts[1], out width);
                    r.Width = width;
                int.TryParse(dataInside, out pid);
            r.Id = pid;

    return result;
  • \$\begingroup\$ I have rolled back the last edit. Please see what you may and may not do after receiving answers. \$\endgroup\$ – Heslacher Sep 7 '16 at 6:54
  • \$\begingroup\$ @Heslacher I thought I give the OP a chance to repair it by himself ;-) \$\endgroup\$ – t3chb0t Sep 7 '16 at 7:12
  • 1
    \$\begingroup\$ @t3chb0t since when are we a firendly community ? ;-) Just kidding. Nevertheless by adding the link to meta the reasons for the rollback are more clear. \$\endgroup\$ – Heslacher Sep 7 '16 at 7:15
  • \$\begingroup\$ Hmm, ok. Seems weird that I should post a new answer when the answer I would post is basically copy paste of @t3chb0t with minor edit for my purpose. But I guess that is a question for a different forum. I'll post the code as an answer when I get back to my dev machine again. \$\endgroup\$ – JensB Sep 7 '16 at 7:29
  • 1
    \$\begingroup\$ @JensB since it's not identical it's perfectly fine to post it as a self-anser. otherwise new visitors might want to review your reviewed code - this would be very confusing to everyone - a vicious circle. \$\endgroup\$ – t3chb0t Sep 7 '16 at 7:33

This is a lot of code for such a simple task... but how about some regex:

string text = "Hi [img-2] tst[img-3] test ttteessstt grawr[img-1-800]tet";

var ids = Regex.Matches(
     RegexOptions.IgnoreCase | RegexOptions.ExplicitCapture
.Select(m => new ImgReplaceItem
    Tag = m.Groups["tag"].Value,
    Id = m.Groups["id"].Value,
    Width = m.Groups["width"].Success ? int.Parse(m.Groups["width"].Value) : 0   


Tag Id  Width

img 2   0
img 3   0
img 1   800

As to the code. I think it's well writen. There isn't actually much to correct if anything.

Just a small adjustment:

if (item.Contains(']'))

You could make it !item.Contains(']') and use the contintue to reduce nesting.

  • \$\begingroup\$ Thank you. I'm going to use this instead, much more clear as to what is happening. Everytime I see regex solutions I think that they are great and want to learn Regex better.. \$\endgroup\$ – JensB Sep 7 '16 at 6:37
  • \$\begingroup\$ @JensB I'm glad I could help ;-) I'd like you to ask to remove the edit from the question and post it as an answer instead.. you can mark it as a community-wiki. It's the preferred way for posting refactored code. \$\endgroup\$ – t3chb0t Sep 7 '16 at 6:45

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