HtmlAnchor.OnServerClick(EventArgs) 方法
定义
重要
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引发 ServerClick 事件。 这使你可以为事件提供自定义处理程序。
protected:
virtual void OnServerClick(EventArgs ^ e);protected virtual void OnServerClick (EventArgs e);abstract member OnServerClick : EventArgs -> unit
override this.OnServerClick : EventArgs -> unitProtected Overridable Sub OnServerClick (e As EventArgs)参数
示例
下面的代码示例演示如何以声明方式指定事件事件处理程序并为其 ServerClick 编写代码。 单击控件 HtmlAnchor 时，将显示一条消息。
<%@ Page Language="C#" AutoEventWireup="True" %>
<!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>
<title> HtmlAnchor ServerClick Event Example </title>
<script runat="server">
void HtmlAnchor_Click(Object sender, EventArgs e)
{
Message.InnerHtml = "Thank you for clicking the HtmlAnchor control.";
}
</script>
</head>
<body>
<form id="form1" runat="server">
<h3> HtmlAnchor ServerClick Event Example </h3>
<a id="AnchorButton"
onserverclick="HtmlAnchor_Click"
runat="server">
Click Here
</a>
<br /><br />
<span id="Message" runat="server"/>
</form>
</body>
</html>
<%@ Page Language="VB" AutoEventWireup="True" %>
<!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>
<title> HtmlAnchor ServerClick Event Example </title>
<script runat="server">
Sub HtmlAnchor_Click(sender As Object, e As EventArgs)
Message.InnerHtml = "Thank you for clicking the HtmlAnchor control."
End Sub
</script>
</head>
<body>
<form id="form1" runat="server">
<h3> HtmlAnchor ServerClick Event Example </h3>
<a id="AnchorButton"
onserverclick="HtmlAnchor_Click"
runat="server">
Click Here
</a>
<br /><br />
<span id="Message" runat="server"/>
</form>
</body>
</html>
下面的代码示例修改前面的示例，以编程方式指定和编码事件的事件处理程序 ServerClick 。
<%@ Page Language="C#" AutoEventWireup="True" %>
<!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>
<title> HtmlAnchor ServerClick Event Example </title>
<script runat="server">
void Page_Load(Object sender, EventArgs e)
{
// Create an EventHandler delegate for the method you want to handle the event
// and then add it to the list of methods called when the event is raised.
AnchorButton.ServerClick += new System.EventHandler(this.HtmlAnchor_Click);
}
void HtmlAnchor_Click(Object sender, EventArgs e)
{
Message.InnerHtml = "Thank you for clicking the HtmlAnchor control.";
}
</script>
</head>
<body>
<form id="form1" runat="server">
<h3> HtmlAnchor ServerClick Event Example </h3>
<a id="AnchorButton"
runat="server">
Click Here
</a>
<br /><br />
<span id="Message" runat="server"/>
</form>
</body>
</html>
<%@ Page Language="VB" AutoEventWireup="True" %>
<!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>
<title> HtmlAnchor ServerClick Event Example </title>
<script runat="server">
Sub Page_Load(sender As Object, e As EventArgs)
' Create an EventHandler delegate for the method you want to handle the event
' and then add it to the list of methods called when the event is raised.
AddHandler AnchorButton.ServerClick, AddressOf HtmlAnchor_Click
End Sub
Sub HtmlAnchor_Click(sender As Object, e As EventArgs)
Message.InnerHtml = "Thank you for clicking the HtmlAnchor control."
End Sub
</script>
</head>
<body>
<form id="form1" runat="server">
<h3> HtmlAnchor ServerClick Event Example </h3>
<a id="AnchorButton"
runat="server">
Click Here
</a>
<br /><br />
<span id="Message" runat="server"/>
</form>
</body>
</html>
注解
单击 ServerClick 控件时将 HtmlAnchor 引发 该事件。 此服务器事件会导致从客户端到服务器以及返回的往返。
引发事件时，将通过委托调用事件处理程序。 有关详细信息，请参阅 处理和引发事件。
OnServerClick 方法还允许派生类对事件进行处理而不必附加委托。 这是在派生类中处理事件的首选技术。
继承者说明
在派生类中重写 OnServerClick(EventArgs) 时，一定要调用基类的 OnServerClick(EventArgs) 方法，以便已注册的委托对事件进行接收。
