string gr, msg, xy;
string[] spec, cour1, cour2, cour3, cour4, cour5;

private bool checkGR()
{
    bool check = true;
    if (textBox1.Text.Trim() == "" || textBox2.Text.Trim() == "")
    {
 check = false;
 MessageBox.Show("姓名和年齡必須填寫");
    }
    return check;
}

private string record()
{
    gr = "";
    gr += textBox1.Text.Trim();
    if (radioButton1.Checked)
 gr += ",男";
    else
 gr += ",女";
    gr += "，" + textBox2.Text.Trim() + "歲，";
    string hobby = "";
    foreach (Control ct1 in groupBox1.Controls)
    {
 CheckBox chk=(CheckBox)ct1;
 if (chk.Checked == true)
 {
     hobby += "<" + chk.Text + ">";
 }
    }

 

    if (hobby != "")
    {
 hobby = "特長" + hobby;
    }
    gr += hobby;
    gr += "./n";

    xy = "所學專業<" + comboBox1.Text+">./n專業必修課程包括: ";
    foreach (object course in listBox1.Items)
    {
 xy += "<" + course.ToString() + ">";
    }
    xy += "。/n";
    if (checkedListBox1.CheckedItems.Count != 0)
    {
 xy += "特別說明:";
 foreach (object intr in checkedListBox1.CheckedItems)
 {
     xy += "<" + intr.ToString() + ">";
     xy += "。";
 }
    }
    
    msg += gr + xy;
    return msg;
}

private void Form1_Load(object sender, EventArgs e)
{
    radioButton1.Checked = true;
    spec = new string[5] { "計算機", "軟件", "網絡", "物聯網", "通信" };
    comboBox1.DataSource = spec;
    comboBox1.SelectedIndex = 0;
    cour1 = new string[] {"計算機應用","程序設計","數據庫","OPP","計網","計科" };
    cour2 = new string[] { "計算機應用", "程序設計", "數據庫", "OPP", "計網", "高級編程" };
    cour3 = new string[] { "計算機應用", "程序設計", "無線網絡安全", "OPP", "協議分析", "計科" };
    cour4 = new string[] { "計算機應用", "程序設計", "計算機數學", "數字媒體", "計網", "計科" };
    cour5 = new string[] { "計算機應用", "數電", "模電", "數學", "通信", "計科" };
    listBox1.DataSource = cour1;
}

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    switch(comboBox1.SelectedIndex)
    {
 case 0:
     listBox1.DataSource = cour1;
     break;
 case 1:
     listBox1.DataSource = cour2;
     break;
 case 2:
     listBox1.DataSource = cour3;
     break;
 case 3:
     listBox1.DataSource = cour4;
     break;
 case 4:
     listBox1.DataSource=cour5;
     break;
    }
}

private void button1_Click(object sender, EventArgs e)
{
    if (checkGR())
    {
 MessageBox.Show(record(), textBox1.Text + "的推薦信息");
    }
}

private void button2_Click(object sender, EventArgs e)
{
    this.Close();
}