C# 3.0'ın getirdiği güzel özelliklerden birisi olan İsimsiz Tipler'in bazı kısıtlamaları bulunmakta. Özellikle de metodlara parametre olarak geçirilme konusunda sıkıntı yaratıyor. Örneğin

static void Main(string[] args)
{
    var
v = new
    {
       
Ad = "oğuz",
        No = 44,
        Miktar = 122.2
    };
    BirDost(v);
}

şeklindeki bir tipi metoda parametre olarak geçirmek isteyelim.Amacımız bu tipin özelliklerindeki - property - değerleri almak ve işlem yapmak olsun.

public static void BirDost(var belirsizTip)
{
...
}

hmmm..işler düşündüğümüz gibi gitmeyecek ve derleyici şöyle bir  hata verecek.

Error 1 The contextual keyword 'var' may only appear within a local variable declaration

Tamam o zaman herşey object'tir mantığından yola çıkarak metodumuzu aşağıdaki gibi değiştirelim.

public static void BirDost(object belirsizTip)
{
 // belirsizTip. (???)
}

Tamam oldu gibi..Ama belirsizTip nesnesi üzerinden Ad,No,Miktar gibi özelliklere nasıl erişebilir ki? Seni seviyorum .NET diyerek biraz reflection uyguluyoruz ve sonuç.

public static void BirDost(object belirsizTip)
{
   
Type t = belirsizTip.GetType();
    PropertyInfo[] ps = t.GetProperties();

   
foreach (PropertyInfo p in ps)
    {
       
Console.WriteLine(p.Name + " => " + p.GetValue(belirsizTip,null));
    }
}

Artık isimsiz tiplerimizi gönül rahatlığı ile - çok mu duygusal oldu nedir? - metodlara parametre olarak aktarbiliriz ;)


 
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