C#列表框、复选列表框、组合框的使用
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：
[csharp]
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：
[csharp]
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：
[csharp]
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：
[csharp]
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：
[csharp]
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
switch(comboBox1.SelectedIndex)
{
case 0:
listBox1.DataSource = cour1;
break;
case 1:
&
补充：软件开发 , C# ,上一个：C#系列教程——decimal类型格式化十进制输出
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