c#：如何在固定 window 大小的两行中动态添加单选按钮

Question

I try to add radio buttons dynamically to a Windows Forms application in two rows (there is always an even amount of radio buttons in my case). I found this question , which helps me to understand how to generally add radio buttons.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Test {
    public partial class Form1 : Form {
        FlowLayoutPanel pnl = new FlowLayoutPanel();

        public Form1() {
            InitializeComponent();
        }        

        void radioButtonHandler(object sender, EventArgs e)
        {
            MessageBox.Show("Radio Button", "Click");
        }

        private void Form1_Load(object sender, EventArgs e) {
            pnl.Dock = DockStyle.Fill;

            for (int i = 0; i < 16; i++)
            {
                pnl.Controls.Add(new RadioButton() { Text = "" + i });
                pnl.Controls[i].Click += new EventHandler(this.radioButtonHandler);
            }

            this.Controls.Add(pnl);
        }
    }
}

The problem is, the mentioned question doesn't cover the following questions:

1. How to set the distance between the radio buttons?
2. How to create a second row with a defined distance below the first row?
3. How to fix the buttons and insert a horizontally scroll bar if the buttons need more space than the current window has?
4. OPTIONAL: In my case the two radio buttons along the vertical line always belong together. Is it possible to automatically deselect the upper or lower one, if the other one is selected? There must only be one selected radio button per vertical line. Maybe with a radio group?

Answer 1

FlowLayoutPanel flp = new FlowLayoutPanel();
flp.Size = new Size(950, 100);
flp.BorderStyle = BorderStyle.FixedSingle;
flp.AutoScroll = true;

for (int i = 0; i < 20; i++)
{
    RadioButton rb = new RadioButton();
    rb.Text = i.ToString();
    rb.AutoSize = false;
    rb.Size = new Size(100, 25);
    flp.Controls.Add(rb);
}

this.Controls.Add(flp);

Answer 2

FlowLayoutPanel panel = new FlowLayoutPanel();
panel.AutoScroll = true;
panel.WrapContents= true;
for (int i = 0; i < 16; i++)
{
   panel .Controls.Add(new RadioButton()
        {
            Text = "" + i,
            Anchor = AnchorStyles.Top | AnchorStyles.Bottom
                   | AnchorStyles.Left | AnchorStyles.Right,
            AutoSize = true,
            Margin = //your styles,
        });
   panel .Controls[i].Click += new EventHandler(this.radioButtonHandler);
}

setting AnchorStyles help you to keep your controls aligned and by proerties like padding or size you can define size of you elements if all radiobuttons ahave same width you can use size attribute.if they dont have a same size its better to use AnchorStyles.