c#二维数组声明简单例子

 protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                string[,] booklist ={
                                        {"001","C# 3.0"},
                                        {"002","ASP.NET3.5"},
                                        {"003","三国演义"},
                                        {"004","水浒"},
                                        {"005","西游记"}
                                    };

                for (int i = 0; i < booklist.GetLength(0); i++)
                {
                    // DrowdownList只能显示二维数组中的一个维度,这里显示的是书名
                    ddlBooks.Items.Add(new ListItem(booklist[i, 1], booklist[i, 0]));
                }

            }
        }

        protected void ddlBooks_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (ddlBooks.SelectedIndex != -1)
            {
                lblBooks.Text = string.Format
                    ("书名：{0},号码：{1}", this.ddlBooks.SelectedItem.Text,

                     this.ddlBooks.SelectedValue);
            }
        }