C# Optional Array Parameter for Class

Published on Author Ranjithilaga

A better design all together would be to have 2 constructors one that gets a int[] and another that doesn’t:

class PriceLevels
{
    public int[] priceLevels { get; set; }
    private readonly int[] defaultPriceLevels = { 2, 3, 3, 4, 5, 6 };

    public PriceLevels()
    {
        priceLevels = defaultPriceLevels;
    }

    public PriceLevels(int[] newPriceLevels)
    {
       priceLevels = newPriceLevels;
    }
}

If not, don’t know if i’d call this “better” but you can use the params keyword:

class PriceLevels
{
    public int[] priceLevels { get; set; }
    private readonly int[] defaultPriceLevels = { 2, 3, 3, 4, 5, 6 };

    public PriceLevels(params int[] newPriceLevels)
    {
        priceLevels = newPriceLevels.Length == 0 ? defaultPriceLevels : newPriceLevels;
    }
}

Also, depending on design, I’m not convinced that it is PriceLevels responsibility to decide what the default values are and maybe it should get it as a dependency in any case – See SOLID andDependency Injection. Then you’d have only 1 constructor:

class PriceLevels
{
    public int[] priceLevels { get; set; }

    public PriceLevels(int[] newPriceLevels)
    {
       priceLevels = newPriceLevels;
    }
}

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Categories C#