获取该String C＃的一部分

Question

:barbosza!barbosza@barbosza.tmi.twitch.tv PRIVMSG #pggamesbr :My text

我想要第二个'：'之后的部分，但是我不能被'：'分割，因为有时也包含它。

Answer 1

You can split and specify the maximum number of items, so that everything after the second colon ends up in the third item:

string[] parts = str.Split(new char[]{':'}, 3);

The part after the second colon is now in parts[2] .

Answer 2

I guess that "he contains it too" means "My text contains it too".

In that case, do this

string toFind = "#pggamesbr :";
string myText = myString.Substring(myString.IndexOf(toFind) + toFind.Length);

Answer 3

I like Guffa's simple Split solution, and would go with that if this is all you need here. But, just for fun...

If you run into a lot of odd cases like this -- things you wish were easier to do with strings -- you can consider adding extension methods to handle them. Eg,

using System;

public static MyStringExtentions
{
    public static string After(this string orig, char delimiter)
    {
        int p = orig.indexOf(delimiter);
        if (p == -1)
            return string.Empty;
        else
            return orig.Substring(p + 1);
    }
}

And then, in your existing code, as long as you have a using directive to include reference access to MyStringExtentions 's definition:

string afterPart = myString.After(':').After(':');

Disclaimer: I didn't actually test this. Some tuning may be required. And it could probably be tuned to be more efficient, etc.

Again, this is probably overkill for this one problem. (See Guffa's perfectly good simple answer for that.) Just tossing it out for when you find yourself with lots of these and want a common way to make them available.

Ref. Extension Methods (C# Programming Guide)