Control.Show 方法
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
向用户显示控件。
public:
void Show();C#
public void Show ();member this.Show : unit -> unitPublic Sub Show ()下面的代码示例显示一个关于对话框，并暂时在其表面上绘制蓝色方块。 此示例要求你定义了派生自 Form 命名 AboutDialog的类。
private:
void menuItemHelpAbout_Click( Object^ /*sender*/, EventArgs^ /*e*/ )
{
// Create and display a modeless about dialog box.
AboutDialog^ about = gcnew AboutDialog;
about->Show();
// Draw a blue square on the form.
/* NOTE: This is not a persistent object, it will no longer be
* visible after the next call to OnPaint. To make it persistent,
* override the OnPaint method and draw the square there */
Graphics^ g = about->CreateGraphics();
g->FillRectangle( Brushes::Blue, 10, 10, 50, 50 );
}
C#
private void menuItemHelpAbout_Click(object sender, EventArgs e)
{
// Create and display a modless about dialog box.
AboutDialog about = new AboutDialog();
about.Show();
// Draw a blue square on the form.
/* NOTE: This is not a persistent object, it will no longer be
* visible after the next call to OnPaint. To make it persistent,
* override the OnPaint method and draw the square there */
Graphics g = about.CreateGraphics();
g.FillRectangle(Brushes.Blue, 10, 10, 50, 50);
}
Private Sub menuItemHelpAbout_Click(sender As Object, _
e As EventArgs) Handles menuItemHelpAbout.Click
' Create and display a modless about dialog box.
Dim about As New AboutDialog()
about.Show()
' Draw a blue square on the form.
' NOTE: This is not a persistent object, it will no longer be
' visible after the next call to OnPaint. To make it persistent,
' override the OnPaint method and draw the square there
Dim g As Graphics = about.CreateGraphics()
g.FillRectangle(Brushes.Blue, 10, 10, 50, 50)
End Sub
显示控件等效于将 Visible 属性设置为 true. Show调用该方法后，该Visible属性将返回一个值，true直到Hide调用该方法。
| 产品 | 版本 |
|---|---|
| .NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 |
| Windows Desktop | 3.0, 3.1, 5, 6, 7 |