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I have ten teams in database table. How to randomly generate matches between teams?

James Z
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Arsalan Raza
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  • welcome to stackoverflow. please include code, error messages, and other _text-based_ information ***as text***, [not as screenshot](https://idownvotedbecau.se/imageofcode). what have you [***tried yourself***](https://idownvotedbecau.se/noattempt/) so far? what problems did you encounter? what have you researched? please **edit** your question to include more information. i recommend [taking the tour](https://stackoverflow.com/tour), as well as reading [how to ask a good question](https://stackoverflow.com/help/how-to-ask) and [what's on topic](https://stackoverflow.com/help/on-topic). – Franz Gleichmann Apr 14 '22 at 07:43
  • Your question have a solution here. https://stackoverflow.com/questions/3093622/generating-all-possible-combinations – Wei Chen Chen Apr 14 '22 at 07:43
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    I think `randomly generate matches` can be understood like this: You can put the ID of the 10 teams into an array and then randomly generate 5 arrays of length 2 , Then the two teams whitch are Randomly divided into the same array play against each other. – Xinran Shen Apr 14 '22 at 09:13

1 Answers1

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You can try to use the following code:

var random = new Random();
            List<yourModel> list= _context.yourModel.ToList();
            Dictionary<int, List<yourModel>> d = new Dictionary<int, List<yourModel>> { };
            var count = list.Count();
            for (int i = 0; i < count/2; i++) {
                List<yourModel> temp = new List<yourModel>();
                int index1 = random.Next(list.Count);
                temp.Add(list[index1]);
                list.RemoveAt(index1);
                int index2 = random.Next(list.Count);
                temp.Add(list[index2]);
                list.RemoveAt(index2);
                d.Add(i , temp);
            }

And the dicitionary is what you want.

Yiyi You
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