Combobox.Items.Add("A");//当..时添加(obj类型)
//用的时候可能非简单添加ABCD
//名称 + ID ,如省份名词+ID,但是只有1个参数
建立Province类并重写tostring
class Province
{
//编写构造函数
public Province(string id, string name)
{
this.Id = id;
this.Name = name;
}
public string Id
{
get;
set;
}
public string Name
{
get;
set;
}
public override string ToString()
{
return this.Name;
}
}
//添加到Combobox
Province p1 = new Province("01", "山西");
comboBox1.Items.Add(p1);
comboBox1.Items.Add(new Province("02", "山东"));
comboBox1.Items.Add(new Province("03", "广东"));
comboBox1.Items.Add(new Province("04", "广西"));
//可以把ID添加到数据库操作等
int n = 10;
MessageBox.Show(n.ToString());
Province obj = (Province)comboBox1.SelectedItem;
MessageBox.Show(obj.Id);
//整体代码如下
namespace _02关于Combox的一种绑定数据方式
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
//当窗体加载时调用
private void Form1_Load(object sender, EventArgs e)
{
Province p1 = new Province("01", "山西");
comboBox1.Items.Add(p1);
comboBox1.Items.Add(new Province("02", "山东"));
comboBox1.Items.Add(new Province("03", "广东"));
comboBox1.Items.Add(new Province("04", "广西"));
}
//增加按钮,当点击按钮时显示ID
private void button1_Click(object sender, EventArgs e)
{
int n = 10;
MessageBox.Show(n.ToString());
//选中相的ID,是Obj类型,转换为Province类型
Province obj = (Province)comboBox1.SelectedItem;
MessageBox.Show(obj.Id);
}
}
//添加Province类
class Province
{
public Province(string id, string name)
{
this.Id = id;
this.Name = name;
}
public string Id
{
get;
set;
}
public string Name
{
get;
set;
}
//重写Tostring
public override string ToString()
{
return this.Name;
}
}
}
