索引器的c#程序

Question

这个程序有错误。谁能解决这个问题？

Error is :TempRecord already defines a member called 'this' with the same parameters value

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication6
{
    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 };
        private int[] d= new int[10]{4,5,5,4,4,43,2,2,5,3};
        // 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;
            }
        }
        public int this[int index]//error:TempRecord already defines a member called 'this' with the same parameters value
        {
            get
            {
                return d[index];
            }

            set
            {
                d[index] = value;
            }
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            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]);
            }
            Console.WriteLine(tempRecord[2]);
            // Keep the console window open in debug mode.
            System.Console.WriteLine("Press any key to exit.");
            System.Console.ReadKey();

        }
    }
}

Answer 1

您有两个名为 this 的成员，它们采用相同的参数。这在 C#(或其他 .Net 语言，据我所知)中是不允许的。

如果两个成员都像您一样返回不同的类型，您会认为您能够做到这一点。但这会给编译器带来歧义。如果您有这样的代码，会调用哪个成员？

object x = tempRecord[3];

使一个或两个索引器成为一个方法。