更新：2007 年 11 月
提供到 Sys.UI.DomEvent 类的 clearHandlers 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。
$clearHandlers(element);
参数
术语 |
定义 |
|---|---|
element |
公开事件的 DOM 元素。 |
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 clearHandlers 方法。
示例
下面的示例说明如何使用 $clearHandlers 快捷方法从元素中清除所有事件处理程序。
<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>$clearHandlers Example</title>
</head>
<body>
<h1>$clearHandlers 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="Move cursor over button and click to see event types."></asp:Label>
<br />
<asp:Button ID="Button1" runat="server" Text="Button 1" AccessKey="b" />
<br />
<asp:Label ID="Label2" runat="server"></asp:Label>
<br />
<asp:Button ID="Button2" runat="server" Text="Clear All Events" />
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>
<script type="text/javascript">
$addHandlers($get("Button1"), {click:processEventInfo,mouseover:processEventInfo,mouseout:processEventInfo});
$addHandler($get("Button2"), "click", clearAllHandlers);
// Event handler displays types for multiple events
function processEventInfo(eventElement) {
var result = '';
result += eventElement.type;
$get('Label2').innerHTML = result;
}
// Event handler clears all events from Button1
function clearAllHandlers(eventElement) {
$get('Label2').innerHTML = '';
$clearHandlers($get("Button1"));
}
</script>
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>$clearHandlers Example</title>
</head>
<body>
<h1>$clearHandlers 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="Move cursor over button and click to see event types."></asp:Label>
<br />
<asp:Button ID="Button1" runat="server" Text="Button 1" AccessKey="b" />
<br />
<asp:Label ID="Label2" runat="server"></asp:Label>
<br />
<asp:Button ID="Button2" runat="server" Text="Clear All Events" />
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>
<script type="text/javascript">
$addHandlers($get("Button1"), {click:processEventInfo,mouseover:processEventInfo,mouseout:processEventInfo});
$addHandler($get("Button2"), "click", clearAllHandlers);
// Event handler displays types for multiple events
function processEventInfo(eventElement) {
var result = '';
result += eventElement.type;
$get('Label2').innerHTML = result;
}
// Event handler clears all events from Button1
function clearAllHandlers(eventElement) {
$get('Label2').innerHTML = '';
$clearHandlers($get("Button1"));
}
</script>