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：
复制代码 代码如下: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：
复制代码 代码如下: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：
复制代码 代码如下: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：
复制代码 代码如下: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：
复制代码 代码如下: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：
复制代码 代码如下: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：
复制代码 代码如下: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。