在C＃中的nestedProperty上使用InvokeMember

Question

I want to use the InvokeMember method for proceed to an OrderBy on a List but it works fine on simple types (string, datetime, etc...) but it fails on nested types...

Here my code :

System.Reflection.PropertyInfo property = typeof(myType).GetProperty(e.SortExpression);
gridView.DataSource = myList.OrderBy(item => typeof(myType).InvokeMember(property.Name, System.Reflection.BindingFlags.GetProperty, null, item, null));
gvOrders.DataBind();

And I need something like this :

System.Reflection.PropertyInfo property = typeof(myType).GetProperty(e.SortExpression);
gridView.DataSource = myList.OrderBy(item => typeof(myType).InvokeMember(property.GetNestedProperty("something").Name, System.Reflection.BindingFlags.GetProperty, null, item, null));
gvOrders.DataBind();

All advices are welcome :)

Answer 1

If I'm understanding your question correctly you are trying to get a property which is not of type myType .

public class Foo
{
    public Foo()
    {
        SomeBar = new Bar();
    }

    public class Bar
    {
        public string SomeProperty { get; set; }
    }

    public Bar SomeBar { get; set; }
}

You'll need to use Type.GetNestedType or Type.GetNestedTypes to extract the inner type.

var foo = new Foo();
foo.SomeBar.SomeProperty = "Hello";

var someProperty = typeof(Foo).GetNestedType("Bar").GetProperty("SomeProperty");

Console.WriteLine(someProperty.GetValue(foo.SomeBar));

Using your code:

PropertyInfo property = typeof(myType).GetNestedTypes()
                                      .First()
                                      .GetProperty(e.SortExpression);