Question

My problem is quite simple
Suppose I have those class:

public class A
{
    public Collection<B> B { get; set; }
    public Collection<C> C { get; set; }
}

public class B
{
    public int IntB { get; set; }
}

public class C
{
    public string StringC { get; set; }
}

And I write a function:

public void GetValue(string fieldName){
        A a = new A();
        PropertyInfo infor = typeof(A).GetProperty(fieldName);
        object obj = infor.GetValue(a,null);
}

My question is how can I turn obj to corresponding Collection, in this case is Collection<B> or Collection<C>, depending in fieldName value
Thank in advance

Answer 1

You can cast it:

var collection = (Collection<B>)(infor.GetValue(a,null));

EDIT:

if you use LINQ on the resulting collections, you may want to use OfType (link: http://msdn.microsoft.com/en-us/library/bb360913.aspx) and/or Cast (link: http://msdn.microsoft.com/en-us/library/bb341406.aspx)
Like

var collection = getCollection(a,null));
collection.OfType<B>.Select(b => b.IntB)....