求谁能够完善

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

namespace 综合训练
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
        }
       private void button2_Click(object sender, EventArgs e)
        {
            String strmsg = "";
            strmsg += "您输入了如下信息：\r\n";
            strmsg += groupBox1.Text + ":+\r\n";
            strmsg += groupBox5.Text + ":+\r\r";
            strmsg += groupBox7.Text + ":+\r\r";
            if (checkedListBox1.CheckedItems.Count != 0)
            {
                int i;
                String s = "";
                for (i = 0; i <= checkedListBox1.CheckedItems.Count - 1; i++)
                {
                    if (i > 0)
                        s += ",";
                    s += Convert.ToString(checkedListBox1.CheckedItems[i]);
                }
                strmsg += groupBox3.Text + ":" + s + "\r\n";
                MessageBox.Show(strmsg);
            }
        }
      


           /* private void button1_Click(object sender, EventArgs e)
        {
            this.openFileDialog1.Filter = "JPG文件(*.JPG)|*JPG";
            this.openFileDialog1.FilterIndex = 1;
            this.openFileDialog1.InitialDirectory = "..\\"; //  .当前目录  ..上级目录
            if (this.openFileDialog1.ShowDialog() = System.Windows.Forms.DialogResult.OK)
            {
                try
                {
                    pictureBox1.Load(openFileDialog1.FileName);  //动态加载
                }
                catch (Exception ex)
                {
                    MessageBox.Show(Convert.ToString(ex));

                }
            }
            }*/

        private void textBox5_TextChanged(object sender, EventArgs e)
        {
        
        }

        private void progressBar1_Click(object sender, EventArgs e)
        {
        
        }

        private void numericUpDown1_ValueChanged(object sender, EventArgs e)
        {
           this.numericUpDown1.TabIndex=3000;
        }

        private void button3_Click(object sender, EventArgs e)
        {
             Application.Exit();
        }

      /*  private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
              comboBox2.Text = "";
            switch(comboBox1.SelectedIndex){
            case0:
            comboBox2.Items.Clear();
             comboBox2.Items.Add("教授");
              comboBox2.Items.Add("副教授");
              comboBox2.Items.Add("讲师");

            case1:
            comboBox2.Items.Add("局级");
              comboBox2.Items.Add("外级");
              comboBox2.Items.Add("科级");
             comboBox2.Items.Add("职员");


            case2:
                 comboBox2.Items.Add("高级工程师");
             comboBox2.Items.Add("工程师");
             comboBox2.Items.Add("技术员");
             comboBox2.Items.Add("工人");
            break;
        }*/

               }
        }