如何将IList通用对象转换为List <object>

Question

我想将一个未知对象传递给一个方法,然后让它以List的形式返回该对象.基本上,我想要这样的东西

object b = new MyType();
object a = new List<MyType>()

public List<object> convertObjectBackToList(object Input)
{
    //if Input is an IList type (Ex: object a above)
    //return List<object>;

    //if Input is an generic object type. (Ex: object b above)
    //return an List<object> which has only one object.
    List<object> Output = new List<object>();
    Output.Add(Input);
    return Output;
}

Answer 1

您可以先将对象IEnumerable强制转换为,然后转换为列表.

public List<object> convertObjectBackToList(object Input)
{
    if(Input is IEnumerable)
        return ((IEnumerable)Input).Cast<Object>().ToList();
    return new List<Object>() { Input };
}

编辑

通用扩展方法甚至会更好

public static partial class SOExtensions
{
    public static List<T> ToList2<T>(this object Input)
    {
        if (Input is IEnumerable)
            return ((IEnumerable)Input).Cast<T>().ToList();
        return new List<T>() { (T)Input };
    }
}

然后你可以用它作为

var list1 = someObject.ToList2<SomeType>();