Пример 1 Описание

class MainClass

{

static void Main()

{

TempRecord tempRecord = new TempRecord();

// Use the indexer's set accessor

tempRecord[3] = 58.3F;

tempRecord[5] = 60.1F;

// Use the indexer's get accessor

for (int i = 0; i < 10; i++)

{

// This example validates the input on the client side. You may

// choose to validate it in the class that implements the indexer, and throw an

// exception or return an error code in the case of invalid input.

if (i < tempRecord.Length)

{

System.Console.WriteLine("Element #{0} = {1}", i, tempRecord[i]);

}

else

{

System.Console.WriteLine("Index value of {0} is out of range", i);

}

}

//Uncomment this code to see how the .NET Framework handles indexer exceptions

//try

//{

// System.Console.WriteLine("Element #{0} = {1}", tempRecord[tempRecord.Length]);

//}

//catch (System.ArgumentOutOfRangeException e)

//{

// System.Console.WriteLine(e);

//}

}

}

// Using a string as an indexer value

class DayCollection

{

string[] days = { "Sun", "Mon", "Tues", "Wed", "Thurs", "Fri", "Sat" };

// This method finds the day or returns -1

private int GetDay(string testDay)

{

int i = 0;

foreach (string day in days)

{

if (day == testDay)

{

return i;

}

i++;

}

return -1;

}

// The get accessor returns an integer for a given string

public int this[string day]

{

get

{

return (GetDay(day));

}

}

}