C# Is Operator C# has an interesting operator know as is. The is operator is used for execution-time type checking. It is a binary operator that returns a Boolean

Vs operatorga kalit so'z sifatida C #

isOperator, bir ob'ekt turi Run-paytda ushbu turi bilan mos bo'lsa, tekshirish uchun ishlatiladi

1 if(obj is SomeClass)

2 {

3 ...

4 }

Holbuki, asoperator mos yozuvlar turlari yoki null turlari o'rtasidagi to'qimalarining bajarish uchun ishlatiladi.

1 SomeClass someObject = obj as SomeClass;

To'qimalarining "klassik" usuli bilan,

1 SomeClass someObject = (SomeClass) obj;

agar aktyorlar bajarilmasa, istisno qo'yiladi. Biroq, asusul bilan, u tekshirilishi mumkin bo'lgan nullga olib keladi va istisno tashlanishidan saqlaning.

1 SomeClass someObject = (obj as SomeClass) ?? new SomeClass();

Eslatma: siz faqat asmos yozuvlar turlari bilan foydalanishingiz mumkin , shuning uchun agar siz qiymat turiga matn kiritish qilsangiz, siz hali ham "klassik" usuldan foydalanishingiz kerak.