Question

I have a c# list type with multiple objects within.

The structure would be

> -List<object>
> --[0] object{object[]}
> ---[0] = object {string}
> ---[1] = object {string}
> ---[2] = object {string}
> --[1] object{object[]}
> ---[0] = object {string}
> ---[1] = object {string}
> ---[2] = object {string}

I can not figure out how to extract the contents of the object strings in each array. No doubt a newbie mistake.

Can anyone give me a pointer please?

Answer 1

It looks like the List<object> really contains only object[] where the elements are string. Try the following

List<object> source = ...;
List<string> destination = new List<string>();
foreach (var obj in source) {
  var array = (object[])obj;
  foreach (var str in array) {
    destination.Add((string)str);
  }
}

If LINQ is available you can do the following

List<string> destination = source
  .SelectMany(x => ((object[])x).Cast<string>())
  .ToList();