C#索引器demo

//简单实例
public class MyClass
{
    private string[] myArray = new string[5];

    // 索引器
    public string this[int index]
    {
        get
        {
            return myArray[index];
        }
        set
        {
            myArray[index] = value;
        }
    }
}

public class Program
{
    static void Main(string[] args)
    {
        MyClass myObject = new MyClass();

        // 设置索引器的值
        myObject[0] = "Hello";
        myObject[1] = "World";

        // 获取索引器的值
        Console.WriteLine(myObject[0]);  // 输出: Hello
        Console.WriteLine(myObject[1]);  // 输出: World
    }
}

//多维数组实例
public class MyMatrix
{
    private int[,] matrix = new int[3, 3];

    // 索引器
    public int this[string row, string column]
    {
        get
        {
            int rowIndex = GetRowIndex(row);
            int columnIndex = GetColumnIndex(column);

            return matrix[rowIndex, columnIndex];
        }
        set
        {
            int rowIndex = GetRowIndex(row);
            int columnIndex = GetColumnIndex(column);

            matrix[rowIndex, columnIndex] = value;
        }
    }

    private int GetRowIndex(string row)
    {
        // 在此处根据行名返回相应的行索引
        // 这里只是一个示例，您需要根据实际需求进行实现
        if (row == "A")
            return 0;
        else if (row == "B")
            return 1;
        else if (row == "C")
            return 2;
        else
            throw new ArgumentException("Invalid row name");
    }

    private int GetColumnIndex(string column)
    {
        // 在此处根据列名返回相应的列索引
        // 这里只是一个示例，您需要根据实际需求进行实现
        if (column == "X")
            return 0;
        else if (column == "Y")
            return 1;
        else if (column == "Z")
            return 2;
        else
            throw new ArgumentException("Invalid column name");
    }
}

public class Program
{
    static void Main(string[] args)
    {
        MyMatrix myMatrix = new MyMatrix();

        // 设置索引器的值
        myMatrix["A", "X"] = 1;
        myMatrix["B", "Y"] = 2;

        // 获取索引器的值
        Console.WriteLine(myMatrix["A", "X"]);  // 输出: 1
        Console.WriteLine(myMatrix["B", "Y"]);  // 输出: 2
    }
}