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为了解决我在使用反射的解决方案中遇到的问题,我需要指定以下代码来向用户显示一个 CheckedListBox,它公开了他们必须选择的条件列表,并根据他们的选择修改特定行为在应用程序中。目前,由于这篇文章,我没有问题获取继承类的字符串名称,但我不知道如何获取每个类的实例。

        DataTable table = new DataTable();
        table.Columns.Add("Intance", typeof(IConditions)); //INSTANCE of the inherited class
        table.Columns.Add("Description", typeof(string)); //name of the inherited class

        //list of all types that implement IConditions interface
        var interfaceName = typeof(IConditions);
        List<Type> inheritedTypes = (AppDomain.CurrentDomain.GetAssemblies()
            .SelectMany(s => s.GetTypes())
            .Where(p => interfaceName.IsAssignableFrom(p) && p != interfaceName)).ToList();

        foreach (Type type in inheritedTypes)
        {
            IConditions i; //here is where I don't know how to get the instance of the Type indicated by 'type' variable

            //I.E: IConditions I = new ConditionOlderThan20(); where 'ConditionOlderThan20' is a class which implements IConditions interface

            table.Rows.Add(i, type.Name);
        }

有可能得到一个对象吗?处理此类问题的更好方法是什么?

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1 回答 1

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只需使用Activator.CreateInstance方法:

IConditions i = Activator.CreateInstance(type) as IConditions;

注意:type如果没有无参数构造函数,这将失败。您可以使用带有参数的 then 版本:

public static Object CreateInstance(Type type, params Object[] args)
于 2014-11-02T19:49:23.570 回答