BulletedListEventArgs.Index 属性
定义
重要
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获取 BulletedList 控件中引发事件的列表项的索引。
public:
property int Index { int get(); };public int Index { get; }member this.Index : intPublic ReadOnly Property Index As Integer属性值
BulletedList 控件中引发事件的列表项的索引。
示例
以下示例演示如何为 Click 控件的事件 BulletedList 指定和编码事件处理程序。 单击列表项时，页面上的控件中会显示一 Label 条消息。
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>BulletedList Click Example</title>
<script runat="server">
void ItemsBulletedList_Click(object sender, System.Web.UI.WebControls.BulletedListEventArgs e)
{
// Change the message displayed in the label based on the index
// of the list item that was clicked.
switch (e.Index)
{
case 0:
Message.Text = "You clicked list item 1.";
break;
case 1:
Message.Text = "You clicked list item 2.";
break;
case 2:
Message.Text = "You clicked list item 3.";
break;
default:
throw new Exception("You did not click a valid list item.");
break;
}
}
</script>
</head>
<body>
<h3>BulletedList Click Example</h3>
<form id="form1" runat="server">
<p>Click on an item in the list to raise the Click event.</p>
<asp:BulletedList id="ItemsBulletedList"
BulletStyle="Disc"
DisplayMode="LinkButton"
OnClick="ItemsBulletedList_Click"
runat="server">
<asp:ListItem Value="http://www.cohowinery.com">Coho Winery</asp:ListItem>
<asp:ListItem Value="http://www.contoso.com">Contoso, Ltd.</asp:ListItem>
<asp:ListItem Value="http://www.tailspintoys.com">Tailspin Toys</asp:ListItem>
</asp:BulletedList>
<asp:Label id="Message"
Font-Size="12"
Width="168px"
Font-Bold="True"
runat="server"
AssociatedControlID="ItemsBulletedList"/>
</form>
</body>
</html>
<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>BulletedList Click Example</title>
<script runat="server">
Sub ItemsBulletedList_Click(ByVal sender As Object, _
ByVal e As System.Web.UI.WebControls.BulletedListEventArgs)
' Change the message displayed in the label based on the index
' of the list item that was clicked.
Select Case (e.Index)
Case 0
Message.Text = "You clicked list item 1."
Case 1
Message.Text = "You clicked list item 2."
Case 2
Message.Text = "You clicked list item 3."
Case Else
Throw New Exception("You did not click a valid list item.")
End Select
End Sub
</script>
</head>
<body>
<h3>BulletedList Click Example</h3>
<form id="form1" runat="server">
<p>Click on an item in the list to raise the Click event.</p>
<asp:BulletedList id="ItemsBulletedList"
BulletStyle="Disc"
DisplayMode="LinkButton"
OnClick="ItemsBulletedList_Click"
runat="server">
<asp:ListItem Value="http://www.cohowinery.com">Coho Winery</asp:ListItem>
<asp:ListItem Value="http://www.contoso.com">Contoso, Ltd.</asp:ListItem>
<asp:ListItem Value="http://www.tailspintoys.com">Tailspin Toys</asp:ListItem>
</asp:BulletedList>
<asp:Label id="Message"
Font-Size="12"
Width="168px"
Font-Bold="True"
runat="server"
AssociatedControlID="ItemsBulletedList"/>
</form>
</body>
</html>
注解
使用此属性以编程方式访问引发事件的控件中 BulletedList 列表项的索引。
