Casting by generic arguments

Question

I am trying to cast an object using generic arguments in C# like (foo<mypara>)obj where the mypara is a generic argument.

public class foo<T>
{
   public string name {get;set;}
    public func<T> value {get;set;}
}

var mypara = myfoo.GetType().GetGenericArguments();

where the value of mypara.Name is "int" or "string", which is actually a string representation of the type.

But how can I get the real type of mypara?

Please add a simple example demonstrating your problem, I'm sorry but I can't make any sense of what your asking as it stands. — asawyer, Apr 09 '12 at 13:25
`obj as foo` is a better syntax. http://msdn.microsoft.com/en-us/library/cc488006.aspx — SouthShoreAK, Apr 09 '12 at 13:28

score 0 · Answer 1 · answered Apr 09 '12 at 13:25

0

A code example would be helpful, however I think all you need is obj.GetType()? That is how you get the type of an object.

answered Apr 09 '12 at 13:25

Justin Pihony

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score 0 · Answer 2 · edited May 23 '17 at 12:04

You can do it like this:

if (value != null)
{
    if (value.GetType().IsGenericType == true
        && value.GetType().GetGenericArguments().Length >= 0)
    {
        IList _valuesList = null;

        if (value.GetType().GetGenericArguments()[0].ToString().ToLower().Contains("int"))
        {
            _valuesList = value as List<int>;
        }
        else if (value.GetType().GetGenericArguments()[0].ToString().ToLower().Contains("decimal"))
        {
            _valuesList = value as List<decimal>;
        }
        else if (value.GetType().GetGenericArguments()[0].ToString().ToLower().Contains("double"))
        {
            _valuesList = value as List<double>;
        }
        else if (value.GetType().GetGenericArguments()[0].ToString().ToLower().Contains("string"))
        {
            _valuesList = value as List<string>;
        }
    }
}

Ref:
Get generic instance generic type using reflection
Reflection a properties of type of generic list
Reflection and generic types

score 0 · Answer 3 · answered Apr 09 '12 at 13:36

0

Use reflection. GetType() on any object will get the name of the type. More reflections are necessary to make it that object type.

answered Apr 09 '12 at 13:36

iefpw

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Casting by generic arguments

3 Answers3