Question

我有类Employee，就像这样。

   class Emp
        {
            int EmpID;
            string EmpName;
            string ProjectName;
        }

我已填充list<employee> empList，并希望在列表框中显示它。我将列表框的itemsource属性设置为empList，我的XAML代码如下

<ListBox Name="lbEmpList">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel>
                        <Label Content="{Binding Path=EmpID}"></Label>
                        <Label Content="{Binding Path=EmpName}"></Label>
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>

不用说这不起作用...任何指针，因为我做错了会有所帮助.. 提前谢谢你

Answer 1

代码隐藏：

public partial class Window1 : Window, INotifyPropertyChanged
{
    private List<Emp> _empList = new List<Emp>();
    public Window1()
    {
        EmpList.Add(new Emp {EmpID = 1, EmpName = "John", ProjectName = "Templates"});
        EmpList.Add(new Emp { EmpID = 2, EmpName = "Smith", ProjectName = "Templates" });
        EmpList.Add(new Emp { EmpID = 3, EmpName = "Rob", ProjectName = "Projects" });

        InitializeComponent();
        lbEmpList.DataContext = this;
    }


    public List<Emp> EmpList
    {
        get { return _empList; }
        set
        {
            _empList = value;
            raiseOnPropertyChanged("EmpList");
        }
    }

    #region Implementation of INotifyPropertyChanged

    public event PropertyChangedEventHandler PropertyChanged;

    private void raiseOnPropertyChanged (string propertyName)
    {
        if (PropertyChanged != null)
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }

    #endregion
}

public class Emp
{
    public int EmpID { get; set;}
    public string EmpName { get; set; }
    public string ProjectName { get; set; }
}

XAML：

<Grid x:Name="grid" ShowGridLines="True"> 
    <ListBox Name="lbEmpList" ItemsSource="{Binding EmpList}">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <StackPanel>
                    <Label Content="{Binding Path=EmpID}"></Label>
                    <Label Content="{Binding Path=EmpName}"></Label>
                </StackPanel>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>
</Grid>

按预期工作。希望这会有所帮助。

Answer 2

将字段设为公共属性并实现INotifyPropertyChanged。您可能还想要一个ObservableCollection而不是List：

 class Emp :INotifyPropertyChanged
 { 
   int _empId;
   public int EmpId
   {
     get { return _empId; }
     set { _empId = value; NotifyChanged("EmpId"); }
   }

   public event PropertyChangedEventHandler PropertyChanged;
   public void NotifyChanged(string property)
   {
     if (PropertyChanged != null)
       PropertyChanged(this, new PropertyChangedEventArgs(property));
   }
 }

如何将集合数据绑定到WPF中的列表框？

2 个答案: