Applying RoundButton on a current button

Question

Here is the class that I Use and my declaration for initialization my problem is that i already made a button on my design. So what will i revise in my code so that, the class that i made will apply to the current button

public Form1()
{
    InitializeComponent();
    Application.DoEvents();
    RoundButton _btn = new RoundButton();
    EventHandler myHandler = new EventHandler(_btnLog_Click);
    _btnLog = _btn;
}

class RoundButton:Button
{
    GraphicsPath GetRoundPath(RectangleF _rect, int radius)
    {
        float r2 = radius / 2f;
        GraphicsPath _gp = new GraphicsPath();

        _gp.AddArc(_rect.X, _rect.Y, radius, radius, 180, 90);
        _gp.AddLine(_rect.X + r2, _rect.Y, _rect.Width - r2, _rect.Y);
        _gp.AddArc(_rect.X + _rect.Width - radius, _rect.Y, radius, radius, 270, 290);
        _gp.AddLine(_rect.Width, _rect.Y + r2, _rect.Width, _rect.Height - r2);
        _gp.AddArc(_rect.X + _rect.Width - radius,
            _rect.Y + _rect.Height - radius, radius, radius, 0, 90);
        _gp.AddLine(_rect.Width - r2, _rect.Height, _rect.X + r2, _rect.Height);
        _gp.AddArc(_rect.X, _rect.Y + _rect.Height - radius, radius, radius, 90, 90);
        _gp.AddLine(_rect.X, _rect.Height - r2, _rect.X, _rect.Y + r2);

        _gp.CloseFigure();
        return _gp;
    }
    protected override void OnPaint(PaintEventArgs e)
    {
        base.OnPaint(e);
        RectangleF _rect = new RectangleF(0, 0, this.Width, this.Height);
        GraphicsPath _gp = GetRoundPath(_rect, 1);

        this.Region = new Region(_gp);
        using (Pen _pen = new Pen(Color.CadetBlue, 1.75f))
        {
            _pen.Alignment = PenAlignment.Inset;
            e.Graphics.DrawPath(_pen, _gp);
        }
    }
}

Possible duplicate of [Rounded edges in button C# (WinForms)](https://stackoverflow.com/questions/28486521/rounded-edges-in-button-c-sharp-winforms) — Ňɏssa Pøngjǣrdenlarp, Sep 24 '17 at 16:21
If you added a `RoundButton` via the designer, then the `RoundButton` created in the first snippet is a different one. That one is never added tot he controls collection so its not clear what you are playing at — Ňɏssa Pøngjǣrdenlarp, Sep 24 '17 at 16:35
It wouldn'gt work properly anyway because the button and event are local to the form load method, so they could disappear at any time after returning. — Kevin Ford, Sep 24 '17 at 21:06

Kevin Ford · Answer 1 · 2017-09-25T09:06:31.967

The simplest way would be to create a UserControl and put the RoundButton class there, then the designer would allow you to add one to the form in the usual way.

Otherwise you will need to double click the form in the designer so that it adds:

    private void Form1_Load(object sender, EventArgs e)
    {
    }

to your code. Then you can add:

    private void Form1_Load(object sender, EventArgs e)
    {
        RoundButton _btn = new RoundButton();
        _btn.Text = "Log";
        _btn.Click += new EventHandler(_btnLog_Click);
        this.Controls.Add(_btn);
    }

    void _btnLog_Click(object sender, EventArgs e)
    {
        // do somethng here
    }

As it is, the button will be at the top left of its container (the form in this case), so you will need to move it to somewhere sensible:

        _btn.Location = new Point(30, 50);

There are any number of things that you can set - see:

https://learn.microsoft.com/en-us/dotnet/framework/winforms/controls/button-control-windows-forms

https://msdn.microsoft.com/en-us/library/system.windows.forms.button(v=vs.110).aspx

Edit:

I assume the exisiting button is just a standard Button, so you will need to delete that one if you aren't going to use it.

Applying RoundButton on a current button

1 Answers1