Show only some object using c#

Question

Already working from last 10 hours couldn't find the working solution.

If anyone could help, this will be really peaceful!

This is my source code =

@foreach (var datas in data)
{                   
    <a class="mylink" href="#" target="_blank">@datas.text</a>                   
}

@code { 
    private IEnumerable<RandomPick> data = new[] {
        new RandomPick { id = 1, text = "Diamond Price" },
        new RandomPick { id = 2, text = "Gold Price" },
        new RandomPick { id = 3, text = "Web Hosting"},
        new RandomPick { id = 4, text = "Insurance Price",
    };
}

My requirement is that, here our of 4 objects I want to choose any 2 random element only on the foreach loop, so when the loop is executed I only want to select 2 random element from the 4 object elements.

Answer 1

What you are looking for is how to pick two random numbers out of four possible numbers without duplicates. And the answer is:

Generate a sequence between 0 and 3 (data.Count() - 1), shuffle them and pick 2 number out of the sequence.

@foreach (var number in randomNumbers)
{                   
    <a class="mylink" href="#" target="_blank">@data.ElementAt(number).text</a>                   
}

@code {
    private IEnumerable<RandomPick> data = new[] {
        new RandomPick { id = 1, text = "Diamond Price" },
        new RandomPick { id = 2, text = "Gold Price" },
        new RandomPick { id = 3, text = "Web Hosting"},
        new RandomPick { id = 4, text = "Insurance Price",
    };

    private Random random = new();

    private IEnumerable<int> randomNumbers = Enumerable.Empty<int>();

    protected override void OnInitialized()
    {
        randomNumbers = Enumerable.Range(0, data.Count() - 1) // { 0, 1, 2, 3 } generate sequence
            .OrderBy(x => random.Next())                      // { 3, 1, 0, 2 } random shuffle
            .Take(2)                                          // { 3, 1 }       pick two
            .ToList();
    }
}

Source for picking the random numbers: https://stackoverflow.com/a/26931594/10839134