Extract Interface
- 2 minutes to read
In This Article
Extracts an interface of public members from a class.
#Purpose
This refactoring is great as a first step to changing your code, so that it uses interfaces instead of specific classes. It allows you to create a new interface based on the class you used previously, and makes that class implement that interface.
#Availability
Available from the context menu or via shortcuts:
- when the caret is on a class declaration statement. The caret should be on the class name and the class should have at least one public member.
#Notes
- The resulting interface is declared right above the source class.
- Rename is automatically invoked for the newly declared interface.
#Example
class │ProductInfo
{
private int _unitPrice;
private int _count;
private int _UnitPrice;
public int UnitPrice
{
get { return _UnitPrice; }
set { _UnitPrice = value; }
}
public int Count
{
get { return _count; }
set { _count = value; }
}
}
Public Class │ProductInfo
Private _unitPrice As Integer
Private _count As Integer
Public Property unitPrice() As Integer
Get
Return _unitPrice
End Get
Set(ByVal value As Integer)
_unitPrice = value
End Set
End Property
Public Property count() As Integer
Get
Return _count
End Get
Set(ByVal value As Integer)
_count = value
End Set
End Property
End Class
Result:
internal interface │MyInterface
{
int UnitPrice { get; set; }
int Count { get; set; }
}
class ProductInfo : IProductInfo
{
private int _unitPrice;
private int _count;
private int _UnitPrice;
public int UnitPrice
{
get { return _UnitPrice; }
set { _UnitPrice = value; }
}
public int Count
{
get { return _count; }
set { _count = value; }
}
}
Public Interface │MyInterface
Property unitPrice() As Integer
Property count() As Integer
End Interface
Public Class ProductInfo
Implements MyInterface
Private _unitPrice As Integer
Private _count As Integer
Public Property unitPrice() As Integer Implements MyInterface.unitPrice
Get
Return _unitPrice
End Get
Set(ByVal value As Integer)
_unitPrice = value
End Set
End Property
Public Property count() As Integer Implements MyInterface.count
Get
Return _count
End Get
Set(ByVal value As Integer)
_count = value
End Set
End Property
End Class
#Animation
