Button.Click 事件
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
發生於按一下 Button 控制項時。
public:
event EventHandler ^ Click;public:
virtual event EventHandler ^ Click;public event EventHandler Click;member this.Click : EventHandler Public Custom Event Click As EventHandler 事件類型
實作
範例
下列程式代碼範例示範如何指定和撰寫事件的事件處理程式 Click ，以便在單擊控件時 Button ，在網頁上顯示訊息。
<%@ 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 xmlns="http://www.w3.org/1999/xhtml" >
<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>
<%@ 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 xmlns="http://www.w3.org/1999/xhtml" >
<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>
備註
Click按兩下控件時Button，就會引發事件。 例如，當沒有命令名稱與 Button 控件相關聯時，通常會使用這個事件 (，而 [提交] 按鈕) 。
如需處理事件的詳細資訊，請參閱 處理和引發事件。
