Control.CanFocus 屬性

定義

命名空間:
System.Windows.Forms
組件:
System.Windows.Forms.dll

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

Boolean

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

屬性
BrowsableAttribute

範例

下列程式碼範例會將焦點設為指定的 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 Visible 和 Enabled 屬性必須同時設為控制項和其所有父控制項的 true，而且控制項必須是表單，而控制項的最外層父系必須是表單。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

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