Button 建構函式
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。
初始化 Button 類別的新執行個體。
public:
Button();public Button ();Public Sub New ()範例
下列程式代碼範例示範如何建立和初始化 類別的新實例 Button 。
<%@ 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 runat="server">
<title> Button Constructor Example </title>
<script runat="server">
void Page_Load(Object sender, EventArgs e)
{
// Create a new Button control.
Button NewButton = new Button();
NewButton.Text="Click Me";
// Register the event-handling method for the Click event.
NewButton.Click += new EventHandler(this.Button_Click);
// Add the control to the Controls collection of the
// PlaceHolder control.
Place.Controls.Clear();
Place.Controls.Add(NewButton);
}
void Button_Click(Object sender, EventArgs e)
{
Message.Text = "Hello World";
}
</script>
</head>
<body>
<form id="form1" runat="server">
<h3> Button Constructor Example </h3>
<asp:Placeholder id="Place"
runat="server"/>
<br /><br />
<asp:Label 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 runat="server">
<title> Button Constructor Example </title>
<script runat="server">
Sub Page_Load(sender As Object, e As EventArgs)
' Create a new Button control.
Dim NewButton As Button = New Button()
NewButton.Text="Click Me"
' Register the event-handling method for the Click event.
AddHandler NewButton.Click, AddressOf Button_Click
' Add the control to the Controls collection of the
' PlaceHolder control.
Place.Controls.Clear()
Place.Controls.Add(NewButton)
End Sub
Sub Button_Click(sender as Object, e As EventArgs)
Message.Text = "Hello World"
End Sub
</script>
</head>
<body>
<form id="form1" runat="server">
<h3> Button Constructor Example </h3>
<asp:Placeholder id="Place"
runat="server"/>
<br /><br />
<asp:Label id="Message"
runat="server"/>
</form>
</body>
</html>
備註
使用此建構函式來建立和初始化 類別的新實例 Button 。
