C#索引器 csdn上的例子

class TempRecord{    // Array of temperature values    private float[] temps = new float[10] { 56.2F, 56.7F, 56.5F, 56.9F, 58.8F,                                             61.3F, 65.9F, 62.1F, 59.2F, 57.5F };    // To enable client code to validate input     // when accessing your indexer.    public int Length    {        get { return temps.Length; }    }    // Indexer declaration.    // If index is out of range, the temps array will throw the exception.    public float this[int index]    {        get        {            return temps[index];        }        set        {            temps[index] = value;        }    }}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++)        {                       System.Console.WriteLine("Element #{0} = {1}", i, tempRecord[i]);                    }        // Keep the console window open in debug mode.        System.Console.WriteLine("Press any key to exit.");        System.Console.ReadKey();    }}

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接口索引器

// Indexer on an interface:public interface ISomeInterface{    // Indexer declaration:    int this[int index]    {        get;        set;    }}// Implementing the interface.class IndexerClass : ISomeInterface{    private int[] arr = new int[100];    public int this[int index]   // indexer declaration    {        get        {               // The arr object will throw IndexOutOfRange exception.            return arr[index];        }        set        {                           arr[index] = value;                        }    }}