C#课程设计 连接SQL数据库

c#课程设计连接SQL public class ListBox: Control { private string[] items; public string this[int index] { get { return items[index]; } set { items[index] = value; Repaint(); } } } 可以用一个循环器来匿名引用字符串内部数组成员,就象下面这样: ListBox listBox = ...; listBox[0] = "hello"; Console.WriteLine(li