wpf项目中,ListBox绑定对象集合，ListBoxItem要显示对象的两个属性,例如：显示员工的工号和姓名。
之前我的做法是在Employee员工类中添加一个"NumAndName",属性，给员工对象的工号属性赋值、姓名属性赋值时，同时给“NumAndName”属性
赋值为“工号”+“姓名”两个属性拼接的字符串，ListBox绑定员工的集合，ListBox的Item绑定"NumAndName"属性，这样就同时显示了工号和姓名。
今天，发现了一个简单的方法，即：在Employee类中重载ToString()方法，核心代码如下：
public class Employee
{
/// <summary>
/// 重载ToString()方法
/// </summary>
/// <returns></returns>
public override string ToString()
{
return this.Num+" "+this.Name;
} //……
下面是demo的完整代码：
XAML：
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="300" Width="225">
<Grid>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<ListBox x:Name="lbx" SelectionMode="Single"/>
<Button Grid.Row="1" Content="Show" Click="Button_Click"/>
</Grid>
</Window>
C#：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes; namespace WpfApplication1
{
/// <summary>
/// MainWindow.xaml 的交互逻辑
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
List<Employee> list = new List<Employee>
{
new Employee{Num=9527,Name="张三",Sex="男"},
new Employee{Num=1086,Name="春丽",Sex="女"},
new Employee{Num=1001,Name="王五",Sex="男"}
};
lbx.ItemsSource = list;
}
/// <summary>
/// Show出lbx的选中项
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Button_Click(object sender, RoutedEventArgs e)
{
if (lbx.SelectedIndex > -1)
{
Employee employee = lbx.SelectedItem as Employee;
string msg = string.Format("工号：{0},\n姓名：{1},\n性别：{2}", employee.Num, employee.Name, employee.Sex);
MessageBox.Show(msg);
}
else
{
MessageBox.Show("未选中任何项！");
}
}
}
public class Employee
{
/// <summary>
/// 重载ToString()方法
/// </summary>
/// <returns></returns>
public override string ToString()
{
return this.Num+" "+this.Name;
}
private string name;
/// <summary>
/// 姓名
/// </summary>
public string Name
{
get { return name; }
set { name = value; }
}
private int num;
/// <summary>
/// 工号
/// </summary>
public int Num
{
get { return num; }
set { num = value; }
}
private string sex;
/// <summary>
/// 性别
/// </summary>
public string Sex
{
get { return sex; }
set { sex = value; }
} }
}
运行效果：
选中ListBox的某项后，按"Show"按钮，Show出春丽的工号、姓名、性别：