Control.CanFocus 屬性

定義

取得指示控制項是否能取得焦點的值。Gets a value indicating whether the control can receive focus.

public:
 property bool CanFocus { bool get(); };
[System.ComponentModel.Browsable(false)]
public bool CanFocus { get; }
member this.CanFocus : bool
Public ReadOnly Property CanFocus As Boolean

屬性值

如果控制項可以取得焦點,則為 true,否則為 falsetrue if the control can receive focus; otherwise, false.

屬性

範例

下列程式碼範例會將焦點設定為指定的 Control (如果可以接收焦點)。The following code example sets focus to the specified Control, if it can receive focus.

public:
   void ControlSetFocus( Control^ control )
   {
      
      // Set focus to the control, if it can receive focus.
      if ( control->CanFocus )
      {
         control->Focus();
      }
   }
public void ControlSetFocus(Control control)
{
   // Set focus to the control, if it can receive focus.
   if(control.CanFocus)
   {
      control.Focus();
   }
}
Public Sub ControlSetFocus(control As Control)
   ' Set focus to the control, if it can receive focus.
   If control.CanFocus Then
      control.Focus()
   End If
End Sub

備註

為了讓控制項接收輸入焦點,控制項必須有指派的控制碼,而且 VisibleEnabled 屬性必須同時設為控制項及其所有父控制項的 true,而且控制項必須是表單或控制項的最外層的父系必須是表單。In order for a control to receive input focus, the control must have a handle assigned to it, and the Visible and Enabled properties must both be set to true for both the control and all its parent controls, and the control must be a form or the control's outermost parent must be a form.

適用於

另請參閱