C#列表框、复选列表框、组合框的用法实例

本文实例讲述了C#列表框、复选列表框、组合框的用法。分享给大家供大家参考。具体分析如下：

功能实现效果如下图所示：

      

实现代码：

1、声明相关变量存储专业、课程设置及相关信息：

string gr, msg, xy;

string[] spec, cour1, cour2, cour3, cour4, cour5;

2、在Form1类中自定义函数bool checkGR()检查学生信息：

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;

}

3、在Form1类中自定义函数string record()收集学生信息：

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;

}

4、Load事件处理程序代码：

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;

}

5、组合框代码设计：

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;

    }

}

6、确定Button代码：

private void button1_Click(object sender, EventArgs e)

{

    if (checkGR())

    {

 MessageBox.Show(record(), textBox1.Text + "的推荐信息");

    }

}

7、退出Button代码：

private void button2_Click(object sender, EventArgs e)

{

    this.Close();

}

希望本文所述对大家的C#程序设计有所帮助。