How to: Consume a C# Indexer (C++/CLI)
Visual C++ does not contain indexers; it has indexed properties. To consume a C# indexer, access the indexer as if it were an indexed property.
For more information about indexers, see:
Example
The following C# program defines an indexer.
// consume_cs_indexers.cs
// compile with: /target:library
using System;
public class IndexerClass {
private int [] myArray = new int[100];
public int this [int index] { // Indexer declaration
get {
// Check the index limits.
if (index < 0 || index >= 100)
return 0;
else
return myArray[index];
}
set {
if (!(index < 0 || index >= 100))
myArray[index] = value;
}
}
}
/*
// code to consume the indexer
public class MainClass {
public static void Main() {
IndexerClass b = new IndexerClass();
// Call indexer to initialize elements 3 and 5
b[3] = 256;
b[5] = 1024;
for (int i = 0 ; i <= 10 ; i++)
Console.WriteLine("Element #{0} = {1}", i, b[i]);
}
}
*/
This Visual C++ program consumes the indexer.
// consume_cs_indexers_2.cpp
// compile with: /clr
#using "consume_cs_indexers.dll"
using namespace System;
int main() {
IndexerClass ^ ic = gcnew IndexerClass;
ic->default[0] = 21;
for (int i = 0 ; i <= 10 ; i++)
Console::WriteLine("Element #{0} = {1}", i, ic->default[i]);
}
Element #0 = 21 Element #1 = 0 Element #2 = 0 Element #3 = 0 Element #4 = 0 Element #5 = 0 Element #6 = 0 Element #7 = 0 Element #8 = 0 Element #9 = 0 Element #10 = 0