KeyDown 事件 (InputComponent)

Fires when a key is pressed while the component has focus.

语法

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'声明
 
<C1CategoryAttribute("键盘")>
<C1DescriptionAttribute("当当组件具有焦点时，按下一个按键时触发。")>
Public Event KeyDown As System.Windows.Forms.KeyEventHandler

'用法
 
Dim instance As InputComponent
Dim handler As System.Windows.Forms.KeyEventHandler
 
AddHandler instance.KeyDown, handler

[C1Category("键盘")]
[C1Description("当当组件具有焦点时，按下一个按键时触发。")]
public event System.Windows.Forms.KeyEventHandler KeyDown

public event KeyDown: System.Windows.Forms.KeyEventHandler;

In JScript, you can handle the events defined by another class, but you cannot define your own.

[C1Category("键盘")]
[C1Description("当当组件具有焦点时，按下一个按键时触发。")]
public: __event System.Windows.Forms.KeyEventHandler* KeyDown

[C1Category("键盘")]
[C1Description("当当组件具有焦点时，按下一个按键时触发。")]
public:
event System.Windows.Forms.KeyEventHandler^ KeyDown

事件数据

The event handler receives an argument of type System.Windows.Forms.KeyEventArgs containing data related to this event. The following KeyEventArgs properties provide information specific to this event.

属性	说明
Alt
Control
Handled
KeyCode
KeyData
KeyValue
Modifiers
Shift
SuppressKeyPress

需求

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

请参见

引用

InputComponent 类
 InputComponent 成员