.net中radiobutton控件获得TAB焦点并选中

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   今天在使用.net winform中的radiobutton中遇到两个问题，一是窗体中的控件不能按tabindex顺序执行，二是radiobutton获得tab焦点后不能实现选中，

    页面如下：

    解决思路如下

    1.捕获textbox的键盘事件，如果在textbox中按下的是tab键，自动使下一个获得tab焦点的单选按钮选中

     2.设置页面中控件的tabindex顺序

    代码如下

 

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 WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Shown(object sender, EventArgs e)
        {
         
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            rb1.TabIndex = 0;
            tb1.TabIndex = 1;
            rb2.TabIndex = 2;
            textBox2.TabIndex = 3;
            rb3.TabIndex = 4;
            textBox3.TabIndex = 5;
            rb1.Focus();
        }

        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
        {
            Control ctl = this.ActiveControl;
            if (keyData == Keys.Tab)
            {
                Console.WriteLine(ctl.Name);
                if (ctl.Name == "tb1")
                {
                    rb2.Checked = true;
                    rb1.Checked = false;
                    rb3.Checked = false;
                }
                if (ctl.Name == "textBox2")
                {
                    rb2.Checked = false;
                    rb1.Checked = false;
                    rb3.Checked = true;
                }
                if (ctl.Name == "textBox3")
                {
                    rb2.Checked = false;
                    rb1.Checked = true;
                    rb3.Checked = false;
                }
            }
            bool ret = base.ProcessCmdKey(ref msg, keyData);
            return ret;
        }
    }
}