CODEWITHSUNDEEP
c#
user194076
user194076

Reputation: 9017

Get partial string from string

I have the following string:

This isMyTest testing

I want to get isMyTest as a result. I only have two first characters available("is"). The rest of the word can vary.

Basically, I need to select a first word delimeted by spaces which starts with chk.

I've started with the following:

if (text.contains(" is"))
{
text.LastIndexOf(" is"); //Should give me index.
}

now I cannot find the right bound of the word since I need to match on something like

Upvotes: 0

Views: 215

Answers (3)

Jmorris007
Jmorris007

Reputation: 51

You can use regular expressions: 


    string pattern = @"\bis";
    string input = "This isMyTest testing";
    return Regex.Matches(input, pattern);

Upvotes: 3

nyxthulhu
nyxthulhu

Reputation: 9752

What about using a regex match? Generally if you are searching for a pattern in a string (ie starting with a space followed by some other character) regex are perfectly suited to this. Regex statements really only fall apart in contextually sensitive areas (such as HTML) but are perfect for a regular string search. 

// First we see the input string.
string input = "/content/alternate-1.aspx";

// Here we call Regex.Match.
Match match = Regex.Match(input, @"[ ]is[A-z0-9]*",     RegexOptions.IgnoreCase);

// Here we check the Match instance.
if (match.Success)
{
    // Finally, we get the Group value and display it.
    string key = match.Groups[1].Value;
    Console.WriteLine(key);
}

Upvotes: 1

Reed Copsey
Reed Copsey

Reputation: 564403

You can use IndexOf to get the index of the next space:

int startPosition = text.LastIndexOf(" is");
if (startPosition != -1)
{
    int endPosition = text.IndexOf(' ', startPosition + 1); // Find next space
    if (endPosition == -1)
       endPosition = text.Length - 1; // Select end if this is the last word?
}

Upvotes: 1

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