在单击
Button 控件时发生。
命名空间:System.Web.UI.WebControls
程序集:System.Web（在 system.web.dll 中）
Public Event Click As EventHandler
Dim instance As Button
Dim handler As EventHandler
AddHandler instance.Click, handler
public event EventHandler Click
public:
virtual event EventHandler^ Click {
void add (EventHandler^ value) sealed;
void remove (EventHandler^ value) sealed;
}
/** @event */
public final void add_Click (EventHandler value)
/** @event */
public final void remove_Click (EventHandler value)
JScript 支持使用事件，但不支持进行新的声明。
当单击 Button 控件时会引发 Click 事件。当没有与 Button 控件（例如 Submit 按钮）关联的命令名时，通常使用该事件。
有关处理事件的更多信息，请参见 使用事件。
下面的代码示例演示如何指定和编写 Click 事件的事件处理程序，以便在用户单击 Button 控件时在网页上显示消息。
<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Sub GreetingBtn_Click(ByVal sender As Object, _
ByVal e As EventArgs)
' When the button is clicked,
' change the button text, and disable it.
Dim clickedButton As Button = sender
clickedButton.Text = "...button clicked..."
clickedButton.Enabled = False
' Display the greeting label text.
GreetingLabel.Visible = True
End Sub
</script>
<html >
<head runat="server">
<title>Button Example</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h3>Simple Button Example</h3>
<asp:Button id="Button1"
Text="Click here for greeting..."
OnClick="GreetingBtn_Click"
runat="server"/>
<br />
<br />
<asp:Label ID="GreetingLabel" runat="server"
Visible=false Text="Hello World!" />
</div>
</form>
</body>
</html>
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
void Page_Load(Object sender, EventArgs e)
{
// Manually register the event-handling method for
// the Click event of the Button control.
Button1.Click += new EventHandler(this.GreetingBtn_Click);
}
void GreetingBtn_Click(Object sender,
EventArgs e)
{
// When the button is clicked,
// change the button text, and disable it.
Button clickedButton = (Button)sender;
clickedButton.Text = "...button clicked...";
clickedButton.Enabled = false;
// Display the greeting label text.
GreetingLabel.Visible = true;
}
</script>
<html >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h3>Simple Button Example</h3>
<asp:Button id="Button1"
Text="Click here for greeting..."
OnClick="GreetingBtn_Click"
runat="server"/>
<br />
<br />
<asp:Label ID="GreetingLabel" runat="server"
Visible=false Text="Hello World!" />
</div>
</form>
</body>
</html>
Windows 98、Windows 2000 SP4、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。
.NET Framework
受以下版本支持：2.0、1.1、1.0