Control.Visible Property
Definition
Important
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Gets or sets a value indicating whether the control and all its child controls are displayed.
public:
property bool Visible { bool get(); void set(bool value); };
public bool Visible { get; set; }
member this.Visible : bool with get, set
Public Property Visible As Boolean
Property Value
true
to display the control and its child controls; otherwise, false
. The default is true
. When getting the value, true
is returned only if the control is visible and the parent control, if it exists, is visible.
Examples
The following code example uses the derived classes VScrollBar and HScrollBar and sets their Visible property values, based on the size of an Image being displayed in a PictureBox control. This example requires that a PictureBox has been created on a form and that HScrollBar and VScrollBar controls have been created on the PictureBox. This code should be called when the image is loaded into the picture box and by the Resize event of the form.
public:
void DisplayScrollBars()
{
// Display or hide the scroll bars based upon
// whether the image is larger than the PictureBox.
if ( pictureBox1->Width > pictureBox1->Image->Width )
{
hScrollBar1->Visible = false;
}
else
{
hScrollBar1->Visible = true;
}
if ( pictureBox1->Height > pictureBox1->Image->Height )
{
vScrollBar1->Visible = false;
}
else
{
vScrollBar1->Visible = true;
}
}
public void DisplayScrollBars()
{
// Display or hide the scroll bars based upon
// whether the image is larger than the PictureBox.
if (pictureBox1.Width > pictureBox1.Image.Width)
{
hScrollBar1.Visible = false;
}
else
{
hScrollBar1.Visible = true;
}
if (pictureBox1.Height > pictureBox1.Image.Height)
{
vScrollBar1.Visible = false;
}
else
{
vScrollBar1.Visible = true;
}
}
Public Sub DisplayScrollBars()
' Display or hide the scroll bars based upon
' whether the image is larger than the PictureBox.
If pictureBox1.Width > pictureBox1.Image.Width Then
hScrollBar1.Visible = False
Else
hScrollBar1.Visible = True
End If
If pictureBox1.Height > pictureBox1.Image.Height Then
vScrollBar1.Visible = False
Else
vScrollBar1.Visible = True
End If
End Sub
Remarks
If you set Visible
to true
:
- The control might not be visible to the user if it's obscured behind other controls.
- The control won't be displayed if the parent control is not visible.
Applies to
See also
Pripomienky
https://aka.ms/ContentUserFeedback.
Pripravujeme: V priebehu roka 2024 postupne zrušíme službu Problémy v službe GitHub ako mechanizmus pripomienok týkajúcich sa obsahu a nahradíme ju novým systémom pripomienok. Ďalšie informácie nájdete na stránke:Odoslať a zobraziť pripomienky pre