更新：2007 年 11 月
提供到 Sys.UI.DomEvent 类的 addHandler 方法的快捷方式。此成员是静态的，可在不创建类实例的情况下调用。
$addHandler(element, eventName, handler);
参数
术语 |
定义 |
|---|---|
element |
公开事件的 DOM 元素。 |
eventName |
事件的名称。 |
handler |
要添加的事件处理程序。 |
备注
有关此快捷方式所表示的方法的详细信息，请参见 Sys.UI.DomEvent addHandler 方法。
示例
下面的示例说明如何使用 $addHandler 快捷方法将事件处理程序与某个元素相关联。
<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html >
<head id="Head1" runat="server">
<title>$addHandler Example</title>
<style type="text/css">
#UpdatePanel1 {
width:300px; height:100px;
}
</style>
</head>
<body>
<h1>$addHandler Example</h1>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server"/>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" ChildrenAsTriggers="False" UpdateMode="Conditional">
<ContentTemplate>
<asp:Panel ID="Panel1" runat="server" GroupingText="Update Panel">
<asp:Label ID="Label1" runat="server" Text="Click button to see event details."></asp:Label>
<br /><br />
<asp:Button ID="Button1" runat="server" Text="Button" AccessKey="b" />
<br /><br />
<asp:Label ID="Label2" runat="server"></asp:Label>
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>
<script type="text/javascript">
$addHandler($get("Button1"), "click", processEventInfo);
var myArray = ['altKey', 'button', 'charCode', 'clientX', 'clientY',
'ctrlKey', 'offsetX', 'offsetY', 'screenX', 'screenY',
'shiftKey', 'target', 'type'];
// Event handler displays element properties specified in array
function processEventInfo(eventElement) {
var result = '';
for (var i = 0, l = myArray.length; i < l; i++) {
var arrayVal = myArray[i];
if (typeof(arrayVal) !== 'undefined') {
// Example: eventElement.clientX
result += arrayVal + " = " + eval("eventElement." + arrayVal) + '<br/>';
}
}
$get('Label2').innerHTML = result;
}
</script>
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html >
<head id="Head1" runat="server">
<title>$addHandler Example</title>
<style type="text/css">
#UpdatePanel1 {
width:300px; height:100px;
}
</style>
</head>
<body>
<h1>$addHandler Example</h1>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server"/>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" ChildrenAsTriggers="False" UpdateMode="Conditional">
<ContentTemplate>
<asp:Panel ID="Panel1" runat="server" GroupingText="Update Panel">
<asp:Label ID="Label1" runat="server" Text="Click button to see event details."></asp:Label>
<br /><br />
<asp:Button ID="Button1" runat="server" Text="Button" AccessKey="b" />
<br /><br />
<asp:Label ID="Label2" runat="server"></asp:Label>
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>
<script type="text/javascript">
$addHandler($get("Button1"), "click", processEventInfo);
var myArray = ['altKey', 'button', 'charCode', 'clientX', 'clientY',
'ctrlKey', 'offsetX', 'offsetY', 'screenX', 'screenY',
'shiftKey', 'target', 'type'];
// Event handler displays element properties specified in array
function processEventInfo(eventElement) {
var result = '';
for (var i = 0, l = myArray.length; i < l; i++) {
var arrayVal = myArray[i];
if (typeof(arrayVal) !== 'undefined') {
// Example: eventElement.clientX
result += arrayVal + " = " + eval("eventElement." + arrayVal) + '<br/>';
}
}
$get('Label2').innerHTML = result;
}
</script>