__property
Visual Studio .NET 2003
Declares either a scalar or indexed property for the managed class.
__property function-declarator
Remarks
The __property keyword introduces the declaration of a property and can appear in a class, interface, or value type. A property can have a getter function (read only), a setter function (write only), or both (read-write).
Note A property name cannot match the name of the managed class containing it. The return type of the getter function must match the type of the last parameter of a corresponding setter function.
For more information on properties in a managed class, see Properties in Managed Classes. For more information on indexed properties, see 13.2 Indexed Properties.
Example
In the following example, a scalar property (Size) is added to the MyClass declaration. The property is then implicitly set and retrieved using the get_Size and set_Size functions:
// keyword__property.cpp
// compile with: /clr
#using <mscorlib.dll>
using namespace System;
__gc class MyClass
{
public:
MyClass() : m_size(0) {}
__property int get_Size() { return m_size; }
__property void set_Size(int value) { m_size = value; }
// compiler generates a pseudo data member called Size
protected:
int m_size;
};
int main()
{
MyClass* class1 = new MyClass;
int curValue;
Console::WriteLine(class1->Size);
class1->Size = 4; // calls the set_Size function with value==4
Console::WriteLine(class1->Size);
curValue = class1->Size; // calls the get_Size function
Console::WriteLine(curValue);
return 0;
}
Output
0 4 4
