C#反射

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反射就是操作C#代码编译后的dll文件，可以获取程序集中的所有数据，并调用运行时类的方法。

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static void Main(string[] args)
{
    // 方式一：通过加载dll文件获取指定Type
    Assembly assembly = Assembly.LoadFrom("Library.dll");
    Type type = assembly.GetType("Libaray.Student");

    // 获取所有Type
    var types = assembly.GetTypes();
    foreach (Type t in types)
    {
        Console.WriteLine(t.Name);
    }

    // 方式二：通过typeof() 获取Type 
    Type type1 = typeof(Libaray.Student);

    // 调用无参构造
    object student = Activator.CreateInstance(type);
    Console.WriteLine(student);

    // 调用有参构造
    object student1 = Activator.CreateInstance(type, new object[] { "2017001", "zhangyuzhen", 22 });
    Console.WriteLine(student1);

    // 调用私有构造
    object student2 = Activator.CreateInstance(type, true);
    Console.WriteLine(student2);

    // 调用方法
    var method = type.GetMethod("Print", BindingFlags.Public | BindingFlags.Instance | BindingFlags.NonPublic);
    method.Invoke(student2,new object[] { "zyz",22});

    // 调用泛型方法
    var method1 = type.GetMethod("Func", BindingFlags.Public | BindingFlags.Instance | BindingFlags.NonPublic);
    var genericMethod = method1.MakeGenericMethod(new Type[] { typeof(int) });
    genericMethod.Invoke(student2, new object[] {});

    // 获取所有属性并设置值
    var properties = type.GetProperties();
    foreach(var property in properties){
        if (property.Name == "Id")
        {
            property.SetValue(student, "001");
        }else if (property.Name == "Name")
        {
            property.SetValue(student, "zhangsan");
        }
        else
        {
            property.SetValue(student, 18);
        }
    }
    Console.WriteLine(student);
}