CODEWITHSUNDEEP
winformscustom-controls
Nikita R.
Nikita R.

Reputation: 7493

How to override UserControl class to draw a custom border?

I would like to override System.Windows.Forms.UserControl to draw a custom border (e.g. using custom color). It's not possiblу to do usign built-in classes, because the only method/property you can affect the border behavior is BorderStyle.

Overriding OnPaint the following way (code below) is not a good solution, because it's basically drawing another border on top of original one.

    protected override void OnPaint(PaintEventArgs e)
    {
        base.OnPaint(e);

        if (this.BorderStyle == BorderStyle.FixedSingle)
            ControlPaint.DrawBorder(e.Graphics, this.ClientRectangle, Color.LightGray, ButtonBorderStyle.Solid);
    }

Does anyone know how to override border drawing in custom control?

Putting this user control into a panel is not an option in my case for certain reasons.

Upvotes: 5

Views: 10819

Answers (1)

Hans Passant
Hans Passant

Reputation: 941465

Set base.BorderStyle to None to the default border isn't drawn. You'll need to override the BorderStyle property to make this work.

    public UserControl1() {
        InitializeComponent();
        base.BorderStyle = BorderStyle.None;
        this.BorderStyle = BorderStyle.FixedSingle;
    }

    private BorderStyle border;

    public new BorderStyle BorderStyle {
        get { return border; }
        set {
            border = value;
            Invalidate();
        }
    }

Upvotes: 7

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