Is there a way to declare new variables in a loop using string?

Question

I need to set 7 items from a match to 7 strings, so instead of doing something like this

var item0 = items.Data.Where(p => p.Key.Equals(matches[i].Participants[participantNum].stats.Item0.ToString())).FirstOrDefault().Key;
var item1 = items.Data.Where(p => p.Key.Equals(matches[i].Participants[participantNum].stats.Item1.ToString())).FirstOrDefault().Key;
var item2 = items.Data.Where(p => p.Key.Equals(matches[i].Participants[participantNum].stats.Item2.ToString())).FirstOrDefault().Key;
var item3 = items.Data.Where(p => p.Key.Equals(matches[i].Participants[participantNum].stats.Item3.ToString())).FirstOrDefault().Key;
//...

I thought of doing something easier in a for loop like this

string[] itemsList = new string[7];
for (int j = 0; j < itemsList.Length; j++)
    {
        string nextItem = $"Item{j}";
        itemsList[j] = items.Data.Where(p => p.Key.Equals(matches[i].Participants[participantNum].stats.nextItem.ToString())).FirstOrDefault().Key; //problem is here
    }

But c# doesn't realize I'm trying to use the nextItem string. Is there a way I can use a string to define what item I want?

@Mosia What effect would that have? It will still be compiled as string nextItem = — ProgrammingLlama
– ProgrammingLlama, Commented Apr 5, 2020 at 13:11
It's also not clear where you are trying to use your nextItem within the loop because the nextItem visible on that Linq seems to be a property of another object. — Mosia Thabo
– Mosia Thabo, Commented Apr 5, 2020 at 13:12
Whenever you start creating variables or properties with numbers at the end like that is a good indication that you should use some type of collection instead. — juharr
– juharr, Commented Apr 5, 2020 at 13:30

Cetin Basoz · Accepted Answer · 2020-04-05 13:42:05Z

1

You can use reflection. ie:

string[] itemsList = new string[7];
var stats = matches[i].Participants[participantNum].stats;
for (int j = 0; j < itemsList.Length; j++)
{
    var nextItem = stats.GetType().GetProperty($"item{j}").GetValue(stats).ToString();
    var v = items.Data.Where(p => p.Key.Equals(nextItem)).FirstOrDefault(); //problem is here
    itemsList[j] = (v != null)?v.Key:"";
}

PS: Probably in your model, you should define an List Items for an easier manipulation.

edited Apr 5, 2020 at 13:42

answered Apr 5, 2020 at 13:29

Cetin Basoz

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1 Comment

NotUnique Over a year ago

A list of items is a problem, I get the data with json text and can't convert it that well. But thanks for the help!

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