ASP.NET Hashtable 对象 教程
在哈希表对象包含项目的键/值对。
看个例子.
<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>
创建一个哈希表
在哈希表对象包含项目的键/值对。把钥匙是用来作为指标，并很快搜索可以用于搜索的价值通过他们的钥匙。
项目被添加到哈希表与购买（ ）方法。
下面的代码创建一个哈希表命名mycountries和四个要素说：
<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>
数据绑定阿哈希表对象可自动生成的文字和价值观下列管制： 动态： RadioButtonList 动态： CheckBoxList 动态：下拉列表动态：列表框绑定数据到RadioButtonList控件，首先创建一个RadioButtonList控件（无任何ASP ： ListItem元素）的。 aspx页：<html>
<body><form runat="server">
<asp:RadioButtonList id="rb" runat="server"
AutoPostBack="True" /></form></body>
</html>然后添加脚本，建立名单：<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>然后，我们添加一个子例程被处决时，用户点击一个项目RadioButtonList控件。当一个单选按钮被点击，一个文本将出现在一个标签：<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 subsub 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>注意：您不能选择的排序顺序的项目增加了哈希表。项目分类按字母顺序或数值，使用SortedList对象。