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。