C#列表框、复选列表框、组合框的使用

来源：互联网发布：数据眼txt qingkan 编辑：程序博客网时间：2024/05/16 11:21

功能实现效果：

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();        }