C# Windows 窗体帮助！ 面板未显示

Question

I have to do a chessboard in C# windows form with panels. I have a button, two textboxs (to set the number of columns and rows) and one big panel where I will place the small panles.

This is the Button Click event:

private void button1_Click(object sender, EventArgs e)
        {
            int x, y, width, height, colors=0;
            Panel paneln;

            rows = Convert.ToInt32(textBox1.Text);
            columns = Convert.ToInt32(textBox2.Text);

            height = panel1.Size.Height / rows;
            width = panel1.Size.Width / columns;
            x = panel1.Location.X;
            y = panel1.Location.Y;

            for (int i=0;i<rows;i++)
            {
                for(int k = 0;k<columns;k++)
                {
                    paneln = new Panel();
                    paneln.Location = new Point(x, y);
                    paneln.Size = new Size(width, height);

                    if (colors % 2 == 0)
                        paneln.BackColor = Color.Black;
                    else
                        paneln.BackColor = Color.White;
                   
                    paneln.BringToFront();
                    panel1.SendToBack();
                    this.Controls.Add(paneln);

                    x += width;
                    colors++;
                }
                x= panel1.Location.X;
                y += height;
                if (columns % 2 == 0) colors++;
            }
            button1.Enabled = false;
        }

It works fine but if the columns value is even, the last panel (the bottom right one) is not displayed.

For example with rows=4 and columns=4 i get this:

BWBW

WBWB

BWBW

WBW

I tried to force the internal for to perform one more loop in the last row, but then it places two panels,which actually makes sense, and makes me think it actually creates the panel object but somehow it isn't shown.

Any suggestion? thanks!

Answer 1

Ok I figured it out! I was doing the

paneln.BringToFront();
panel1.SendToBack();

before adding paneln to the form, so it didn't work.