Hashtable 对象包含用键/值对表示的项目。键被用作索引，通过搜索键，可以实现对值的快速搜索。
通过 Add() 方法向 Hashtable 添加项目。
下面的代码创建了一个名为 mycountries 的 Hashtable 对象，并添加了四个元素：
| <script runat="server"> |
| Sub Page_Load |
| if Not Page.IsPostBack then |
| dim mycountries=New Hashtable |
| mycountries.Add("N","Norway") |
| mycountries.Add("S","Sweden") |
| mycountries.Add("F","France") |
| mycountries.Add("I","Italy") |
| end if |
| end sub |
| </script> |
Hashtable 对象可为下列的控件自动生成文本和值：
为了绑定数据到 RadioButtonList 控件，首先要在 .aspx 页面中创建一个 RadioButtonList 控件（不带任何 asp:ListItem 元素）：
| <html> |
| <body> |
| <form runat="server"> |
| <asp:RadioButtonList id="rb" runat="server" AutoPostBack="True" /> |
| </form> |
| </body> |
| </html> |
| <script runat="server"> |
| sub Page_Load |
| if Not Page.IsPostBack then |
| dim mycountries=New Hashtable |
| mycountries.Add("N","Norway") |
| mycountries.Add("S","Sweden") |
| mycountries.Add("F","France") |
| mycountries.Add("I","Italy") |
| rb.DataSource=mycountries |
| rb.DataValueField="Key" |
| rb.DataTextField="Value" |
| rb.DataBind() |
| end if |
| end sub |
| </script> |
| <html> |
| <body> |
| <form runat="server"> |
| <asp:RadioButtonList id="rb" runat="server" AutoPostBack="True" /> |
| </form> |
| </body> |
| </html> |
| <script runat="server"> |
| sub Page_Load |
| if Not Page.IsPostBack then |
| dim mycountries=New Hashtable |
| mycountries.Add("N","Norway") |
| mycountries.Add("S","Sweden") |
| mycountries.Add("F","France") |
| mycountries.Add("I","Italy") |
| rb.DataSource=mycountries |
| rb.DataValueField="Key" |
| rb.DataTextField="Value" |
| rb.DataBind() |
| end if |
| end sub |
| sub displayMessage(s as Object,e As EventArgs) |
| lbl1.text="Your favorite country is: " & rb.SelectedItem.Text |
| end sub |
| </script> |
| <html> |
| <body> |
| <form runat="server"> |
| <asp:RadioButtonList id="rb" runat="server" |
| AutoPostBack="True" onSelectedIndexChanged="displayMessage" /> |
| <p><asp:label id="lbl1" runat="server" /></p> |
| </form> |
| </body> |
| </html> |
注释：您无法选择添加到 Hashtable 的项目的排序方式。如需对项目进行字母排序或者数字排序，请使用 SortedList 对象。 