Windows Forms FAQ resources

2. Windows Forms Controls

2.20 How do I prevent resizing of my Controls by the user, via Docking or anchoring or manual resizing during design-time?

The best place to ensure a particular height/width for you control is in the SetBoundsCore override of your Control, as follows:

protected override void SetBoundsCore(int x, int y, int width, int height, BoundsSpecified specified)

{

int prefHeight = this.GetPreferredHeight();

// Ensure that the height is atleast as big as prefHeight

if(height < prefHeight)

height = prefHeight;

base.SetBoundsCore(x, y, width, height, specified);

}

Protected Overrides Sub SetBoundsCore(ByVal x As Integer, ByVal y As Integer, ByVal width As Integer, ByVal height As Integer, ByVal specified As BoundsSpecified)

Dim prefHeight As Integer = Me.GetPreferredHeight()

' Ensure that the height is atleast as big as prefHeight

If height < prefHeight Then

height = prefHeight

End If

MyBase.SetBoundsCore(x, y, width, height, specified)

End Sub