C#列表框、复选列表框、组合框的用法实例

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("姓名和年龄必须填写");
    }
    return check;
}

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

 

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

    xy = "所学专业<" + comboBox1.Text+">./n专业必修课程包括: ";
    foreach (object course in listBox1.Items)
    {
 xy += "<" + course.ToString() + ">";
    }
    xy += "。/n";
    if (checkedListBox1.CheckedItems.Count != 0)
    {
 xy += "特别说明:";
 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] { "计算机", "软件", "网络", "物联网", "通信" };
    comboBox1.DataSource = spec;
    comboBox1.SelectedIndex = 0;
    cour1 = new string[] {"计算机应用","程序设计","数据库","OPP","计网","计科" };
    cour2 = new string[] { "计算机应用", "程序设计", "数据库", "OPP", "计网", "高级编程" };
    cour3 = new string[] { "计算机应用", "程序设计", "无线网络安全", "OPP", "协议分析", "计科" };
    cour4 = new string[] { "计算机应用", "程序设计", "计算机数学", "数字媒体", "计网", "计科" };
    cour5 = new string[] { "计算机应用", "数电", "模电", "数学", "通信", "计科" };
    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 + "的推荐信息");
    }
}

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