CODEWITHSUNDEEP
c#winforms
user7592671
user7592671

Reputation: 310

Inserting dashes into string

I would like to know how I could insert dashed into various points into a string? I have a string that is 32 characters long I need dashes in various places 8-4-4-4-12

8 characters - 4characters... and so on till string is complete.

I tried REGEX but can only get it to add dashes at regular intervals 

 string newString = Regex.Replace(currentEPC, ".{6}", "$0-");

I am trying to parse a string as a Guid, but my string does not contain dashes, which it needs to be converted to the Guid.

Upvotes: 0

Views: 1148

Answers (2)

Tim Schmelter
Tim Schmelter

Reputation: 460238

As Patrick has shown, you don't need to insert the dashes to parse the string to Guid.

However, if you need this method anyway you can use:

public static string InsertStrings(string text, string insertString, params int[] rangeLengths)
{
    var sb = new StringBuilder(text);
    var indexes = new int[rangeLengths.Length];
    for (int i = 0; i < indexes.Length; i++)
        indexes[i] = rangeLengths[i] + indexes.ElementAtOrDefault(i-1) + insertString.Length;

    for (int i = 0; i < indexes.Length; i++)
    {
        if(indexes[i] < sb.Length)
            sb.Insert(indexes[i], insertString);
    }

    return sb.ToString();
}

Usage:

string guidString = "36b1dbc650c6407098247f87790144ff";
guidString =  InsertStrings(guidString, "-", 8, 4, 4, 4, 12);

Upvotes: 2

Patrick Hofman
Patrick Hofman

Reputation: 157058

I am trying to parse a string as a Guid, but my string does not contain dashes, which it needs to be converted to the Guid.

No, it doesn't:

Guid g = Guid.Parse("084c1bfd133d403384e1c02113b52f8c");

This will parse the GUID for you. If you want to have it in a string representation with dashes:

string s = g.ToString();

Upvotes: 3

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