Question

I’m currently having the following method which requires params – I cannot change this methods definition:

public static DoStuff(params Parameter[] p){ /* ... */ }

I do not know how many parameters I’ll have at runtime, so I want to pass an array or a list – I’ve thought about using Iterators like this:

List<Parameter> pList = new List<Parameter>();
pList.Add(new Parameter("@a", "aaaa!");
pList.Add(new Parameter("@b", "bbbb!");
pList.Add(new Parameter("@c", "cccc!");
DoStuff(Iterate(pList));

And here’s the Iterate-Method:

public static IEnumerator<Parameter> Iterate(List<Parameter> pList)
    {
        foreach (Parameter p in pList)
            yield return p;
    }

Unfortunately, it does not work, it keeps telling me that it can’t cast (generated type) to CommandParameter.

Any help (or different approaches) would be appreciated!

Edit: It appears, in an attempt to simplify my solution for the sake of making my question understandable I trivialized my problem.

In addition to this array, I’d like to also pass “normal” Parameters like this:

DoStuff(Iterate(pList), new Parameter("@d", "dddd!"));

I do this merely out of curiosity to see whether it works – but this does not work simply by casting my List to an Array and appending the next Parameter.

Thanks,

Dennis

Answer 1

You could do it like that:

DoStuff(pList.Concat(new[]{ new Parameter("@d", "dddd!"), new Parameter("@e", "eeee!"}).ToArray());