玩轉C#之【反射 射爆妳】

介紹

Dll-IL-Metadata-反射

1. 透過VS編譯器　編譯成dll/exe
2. 點擊exe的時候，他有一個依賴的環境叫做CLR

反射＋屬性（Property/Field）

public class People
{
    public People()
    {
        Console.WriteLine("{0}",this.GetType().FullName);
    }
    public int Id{get;set;}//Property
    
    public string Name{get;set;}//Property
    
    public string Description;//Field
}

People people = new People();
people.Id = 123;
people.Name ="Lucy";
people.Description ="高級班";

Type type =typeof(People);
object oPeople = Activator.CreateInstance(type);
foreach(var item in type.GetProperties())
{
    Console.WriteLine(type.Name);
    Console.WriteLine(item.Name);
    Console.WriteLine(item.GetValue(oPeople));
    if(item.Name.Equals("Id"))
    {
        item.SetValue(oPeople,234);
    }else if(item.Name.Equals("Name"))
    {
        item.SetValue(oPeople,"風蕭蕭");
    }

}
foreach(var item in type.GetFields())
{
    Console.WriteLine(type.Name);
    Console.WriteLine(item.Name);
    Console.WriteLine(item.GetValue(oPeople));
    if(item.Name.Equals("Description"))
    {
        item.SetValue(oPeople,"昕學員");
    }
}

反射好處和限制

參考資料