Is there a way I can count if the number of occurrences of semicolon in a string is more than two in C#

Question

I would like to do a check to count the number of times a ":" appears in a string. Already I have this code:

        if (string.IsNullOrWhiteSpace(entryTrimmed) ||
            isAvailable != null ||
            entryTrimmed.StartsWith("::") ||
            entryTrimmed.EndsWith("::")) ||
            entryTrimmed.
        {
            OK_Button.IsEnabled = false;
            return;
        }

Is there a simple way that I could also include where there are more than three ":"?

Do they have to be together? Currently your code only looks for colons at the start or end. Just `entryTrimmed.Count(c => c == ':')` will tell you how many colons are in the string. — Jon Skeet, Nov 15 '20 at 14:03

score 1 · Answer 1 · answered Nov 15 '20 at 14:06

1

You can use count method

var colonCount = entryTrimmed.Count(e => e == ':')

answered Nov 15 '20 at 14:06

Aakash

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score 1 · Accepted Answer · answered Nov 15 '20 at 14:08

Simple linq's count:

    if (string.IsNullOrWhiteSpace(entryTrimmed) ||
        isAvailable != null ||
        entryTrimmed.StartsWith("::") ||
        entryTrimmed.EndsWith("::")) ||
        entryTrimmed.Count(c => c == ':') > 3 // there are more than three ":"
    {
        OK_Button.IsEnabled = false;
        return;
    }

If you don't want to use linq, you can use Replace and Length:

    if (string.IsNullOrWhiteSpace(entryTrimmed) ||
        isAvailable != null ||
        entryTrimmed.StartsWith("::") ||
        entryTrimmed.EndsWith("::")) ||
        entryTrimmed.entryTrimmed.Length - entryTrimmed.Replace(":", "").Length > 3 // there are more than three ":"
    {
        OK_Button.IsEnabled = false;
        return;
    }

Is there a way I can count if the number of occurrences of semicolon in a string is more than two in C#

2 Answers2