我有两个List<ColumnClass>
。一个用于左侧列表视图,另一个用于右侧列表视图。这些列表视图位于弹出框中。我正在修改Listviews的List并再次将其分配给Listview的ItemsSource。但这并没有立即反映在用户界面中。当我关闭弹出窗口并再次打开时,它会反映出更改。我错过了什么?
答案 0 :(得分:2)
您应该将List<T>
替换为ObservableCollection<T>
,ObservableCollections会在删除项目时更新您的ListView,如果您只是修改属性,则ColumnClass
确保您的ColumnClass
实现INotifyPropertyChanged
这将允许UI在属性更改时更新。
示例:
代码:
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
MyColumns.Add(new ColumnClass { Name = "Column1" });
MyColumns.Add(new ColumnClass { Name = "Column2" });
MyColumns.Add(new ColumnClass { Name = "Column3" });
}
private ObservableCollection<ColumnClass> _myColumns = new ObservableCollection<ColumnClass>();
public ObservableCollection<ColumnClass> MyColumns
{
get { return _myColumns; }
set { _myColumns = value; }
}
}
XAML:
<Window x:Class="WpfApplication8.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="WpfApplication8" Height="368" Width="486" Name="UI" >
<Grid>
<ListView ItemsSource="{Binding ElementName=UI, Path=MyColumns}" DisplayMemberPath="Name" />
</Grid>
</Window>
型号:
public class ColumnClass : INotifyPropertyChanged
{
private string _name;
public string Name
{
get { return _name; }
set { _name = value; NotifyPropertyChanged("Name"); }
}
public event PropertyChangedEventHandler PropertyChanged;
/// <summary>
/// Notifies the property changed.
/// </summary>
/// <param name="property">The info.</param>
public void NotifyPropertyChanged(string property)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
}
}
答案 1 :(得分:0)
您应该将List<T>
更改为ObservableCollection<T>
或BindingList<T>
。
原因,列表未实现INotifyPropertyChanged
。