34 lines
1.0 KiB
C#
34 lines
1.0 KiB
C#
using System;
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using Avalonia.Controls;
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using Avalonia.Controls.Primitives;
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using Notes.Models;
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using Notes.ViewModels;
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namespace Notes.Views;
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public class NoteView : TemplatedControl
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{
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//TemplatedControl必须在这监听，比较晚创建，但是实例化是一开始执行的，会找不到子元素
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protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
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{
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base.OnApplyTemplate(e);
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var listBox = e.NameScope.Find<ListBox>("listNotes");
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if (listBox == null) throw new NullReferenceException(nameof(listBox));
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listBox.AddHandler(SelectingItemsControl.SelectionChangedEvent, this.Handler);
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}
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private void Handler(object? sender, SelectionChangedEventArgs e)
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{
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if (e.AddedItems.Count>0)
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{
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var eAddedItem = e.AddedItems[0];
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if (eAddedItem is Note note)
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{
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if (DataContext is NoteViewModel noteViewModel)
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{
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noteViewModel.SelectedNote = note;
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}
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}
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}
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}
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} |