How do I select an item in a list, C#?

Question

0.00/5 (No votes)

See more:

I have a list of items, how can I select two consecutive items each time, for example (1 and 2) (2 and 3) (3 and 4)...etc?

What I have tried:

for (i = 0; i <= list.Count-1; i++)
           {
               //var first = list(i);
               //var second = list(i+1);

           }

Posted 23-Jan-18 4:02am

Mazin78

Updated 23-Jan-18 4:27am

Add a Solution

Comments

johannesnestler 23-Jan-18 10:22am

so what's the Problem? You talking about selection so the question maybe has to do with a UI-component/Control Problem because a "list" itself has no selection feature. So please try to formulate a better question and explain your real problem...

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard Deeming · Accepted Answer · 2018-01-23T04:27:00

Assuming the source implements IList<T> or IReadOnlyList<T>:

C#

for (int i = 0; i < list.Count - 1; i++)
{
    var first = list[i];
    var second = list[i + 1];
}

If you want to use LINQ:

C#

foreach (var pair in list.Zip(list.Skip(1), (first, second) => (first, second)))
{
    var first = pair.first;
    var second = pair.second;
}

(Using the new C# 7 value tuple syntax[^]. If you're using an older compiler, or targeting an older framework, use an anonymous type instead.)