Codes. Newobj Field
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Creates a new object or a new instance of a value type, pushing an object reference (type
O) onto the evaluation stack.
public: static initonly System::Reflection::Emit::OpCode Newobj;
public static readonly System.Reflection.Emit.OpCode Newobj;
staticval mutable Newobj : System.Reflection.Emit.OpCode
Public Shared ReadOnly Newobj As OpCode
The following table lists the instruction's hexadecimal and Microsoft Intermediate Language (MSIL) assembly format, along with a brief reference summary:
||Allocates an uninitialized object or value type and calls the constructor method
The stack transitional behavior, in sequential order, is:
argnare pushed on the stack in sequence.
arg1are popped from the stack and passed to
ctorfor object creation.
A reference to the new object is pushed onto the stack.
newobj instruction creates a new object or a new instance of a value type.
Ctor is a metadata token (a
methoddef that must be marked as a constructor) that indicates the name, class and signature of the constructor to call.
newobj instruction allocates a new instance of the class associated with
ctor and initializes all the fields in the new instance to 0 (of the proper type) or null references as appropriate. It then calls the constructor
ctor with the given arguments along with the newly created instance. After the constructor has been called, the now initialized object reference (type
O) is pushed on the stack.
From the constructor's point of view, the uninitialized object is argument 0 and the other arguments passed to newobj follow in order.
All zero-based, one-dimensional arrays are created using Newarr, not
newobj. On the other hand, all other arrays (more than one dimension, or one-dimensional but not zero-based) are created using
Value types are not usually created using
newobj. They are usually allocated either as arguments or local variables, using
newarr (for zero-based, one-dimensional arrays), or as fields of objects. Once allocated, they are initialized using Initobj. However, the
newobj instruction can be used to create a new instance of a value type on the stack, that can then be passed as an argument, stored in a local, and so on.
OutOfMemoryException is thrown if there is insufficient memory to satisfy the request.
MissingMethodException is thrown if a constructor method
ctor with the indicated name, class and signature could not be found. This is typically detected when Microsoft Intermediate Language (MSIL) instructions are converted to native code, rather than at runtime.
The following Emit method overload can use the