从父用户控件获取属性值

Question

I want to create a method to get a value from the parent user control but PropertyInfo can't get the value from the parent control and throws an exception. I think this is happening because it's not the object's actual type.

I am using .NET 2 so I can't use dynamic keyword.

Is there any way to do this?

    public object GetFromPar(Control parent, string propertyName, Type parentType)
    {
        while (parent != null)
        {
            if (parent.GetType().IsSubclassOf(parentType))
            {
                PropertyInfo info = parent.GetType().GetProperty(propertyName);
                return info.GetValue(parent, null);
            }
            else
            {
                parent = parent.Parent;
            }
        }

        return null;
    }

And this is how i call this function.

this.GetFromPar(this.Parent, "Name", typeof(InfoControl));

InfoControl is a user control that was a parent of LoginPanelControl (this).

Thank you in advance.

Answer 1

PropertyInfo info = (typeof(parent.GetType())).GetProperty(propertyName);

如果您知道父项的类型，则可以将其替换为parent.GetType（）。