GetUpperBound()方法來取得Array陣列維度上限

注意 GetUpperBound() 起始維度0開始所以要+1

範例如下

public partial class Frm_Main : Form
    {
        public Frm_Main()
        {
            InitializeComponent();
        }
        private string[,] G_str_array;//定義全域陣列類型變數
        private Random G_Random_Num = new Random();//產生全域隨機數物件
        private void btn_GetArray_Click(object sender, EventArgs e)
        {
            txt_display.Clear();//清空控制元件中的字串
            G_str_array = new string[//隨機產生二維陣列
                G_Random_Num.Next(2, 10),//2~10隨機範圍
                G_Random_Num.Next(2, 10)];//2~10隨機範圍
            lab_Message.Text = string.Format(
                "產生了 {0} 行 {1 }列 的陣列",
                G_str_array.GetUpperBound(0) + 1,//取得陣列的行數
                G_str_array.GetUpperBound(1) + 1);//取得陣列的列數
            DisplayArray();//呼叫顯示陣列方法
        }
        private void DisplayArray()
        {
            //使用循環賦值
            for (int i = 0; i < G_str_array.GetUpperBound(0) + 1; i++)
            {
                for (int j = 0; j < G_str_array.GetUpperBound(1) + 1; j++)
                {
                    //將維度字串寫入陣列
                    G_str_array[i, j] = i.ToString() + "," + j.ToString() + "  ";
                }
            }
            //使用循環輸出
            for (int i = 0; i < G_str_array.GetUpperBound(0) + 1; i++)
            {
                for (int j = 0; j < G_str_array.GetUpperBound(1) + 1; j++)
                {
                    txt_display.Text += G_str_array[i, j];
                }
                txt_display.Text += Environment.NewLine;//換行
            }
        }
    }<\CODE>