Information Technology Reference
In-Depth Information
Indexer Overloading
A class can have more than one indexer, as long as the parameter lists are different. It is not suf-
ficient for the indexer
type
to be different. This is called
indexer overloading
, because all the
indexers have the same “name”—the
this
access reference.
For example, the following class has three indexers: two of type
string
, and one of type
int
. Of the two indexers of type
string
, one has a single
int
parameter and the other has
two
int
parameters.
class MyClass
{
↓
↓
public string this [ int index ]
{
get { ... }
set { ... }
}
↓
↓
public string this [ int index1, int index2 ]
{
get { ... }
set { ... }
}
↓
↓
public int this [ float index1 ]
{
get { ... }
set { ... }
}
...
}
■
Note
Remember that what is important is that the parameter lists be different in each of the overloaded
indexers of the class.
