使用数据库绑定ListBox控件

1. The HTML Markup

 <div>
        <asp:ListBox ID="ListBox1" runat="server"></asp:ListBox>  <br />
        <asp:Button ID="Button1" runat="server" Text="Get Selected Values" OnClick="Button1_Click" />
    </div>

2. The button event

 protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                   //填充数据
                    DataTable dt = new DataTable();
                    dt.Columns.Add(new DataColumn() { ColumnName = "Id", DataType = typeof(int) });
                    dt.Columns.Add(new DataColumn() { ColumnName = "Name", DataType = typeof(string) });

                    dt.Rows.Add(1, "Scott");
                    dt.Rows.Add(2, "John");
                    dt.Rows.Add(3, "Tom");
                    dt.Rows.Add(4, "Ross");

                    ListBox1.DataValueField = "Id";
                    ListBox1.DataTextField = "Name";

                    ListBox1.DataSource = dt;
                    ListBox1.DataBind();
            }
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            int id = int.Parse(ListBox1.SelectedItem.Value);
            Response.Write(id);
        }