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Merge pull request #232 from JIIIIL/main

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TreeView添加多重嵌套绑定示例
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Zhang Dian 2023-07-17 21:29:53 +08:00 committed by GitHub
commit 2132a4322f
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2 changed files with 110 additions and 42 deletions
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108
demo/Semi.Avalonia.Demo/Pages/TreeViewDemo.axaml
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@ -4,53 +4,79 @@
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:models="using:Semi.Avalonia.Demo.Pages"
xmlns:vm="clr-namespace:Semi.Avalonia.Demo.Pages"
d:DesignHeight="450"
d:DesignWidth="800"
x:CompileBindings="True"
x:DataType="vm:TreeViewVm"
mc:Ignorable="d">
<StackPanel HorizontalAlignment="Left">
<TreeView>
<TreeViewItem Header="Level 1">
<TreeViewItem Header="Level 2" />
<TreeViewItem Header="Level 2" />
<TreeViewItem Header="Level 2" />
<TreeViewItem Header="Level 2" />
<TreeViewItem Header="Level 2">
<TreeViewItem Header="Level 3" />
<TreeViewItem Header="Level 3" />
<TreeViewItem>
<TreeViewItem.Header>
<StackPanel>
<TextBlock>Layer 1</TextBlock>
<TextBlock>Layer 2</TextBlock>
<TextBlock>Layer 3</TextBlock>
</StackPanel>
</TreeViewItem.Header>
<TreeViewItem Header="Level 4" />
<TreeViewItem Header="Level 4" />
<TreeViewItem Header="Level 4" />
<TreeViewItem Header="Level 4" />
<TreeViewItem Header="Level 4" />
<TreeViewItem Header="Level 4" />
<Grid ColumnDefinitions="*,*,*">
<Border Theme="{StaticResource CardBorder}">
<TreeView>
<TreeViewItem Header="Level 1">
<TreeViewItem Header="Level 2" />
<TreeViewItem Header="Level 2" />
<TreeViewItem Header="Level 2" />
<TreeViewItem Header="Level 2" />
<TreeViewItem Header="Level 2">
<TreeViewItem Header="Level 3" />
<TreeViewItem Header="Level 3" />
<TreeViewItem>
<TreeViewItem.Header>
<StackPanel>
<TextBlock>Layer 1</TextBlock>
<TextBlock>Layer 2</TextBlock>
<TextBlock>Layer 3</TextBlock>
</StackPanel>
</TreeViewItem.Header>
<TreeViewItem Header="Level 4" />
<TreeViewItem Header="Level 4" />
<TreeViewItem Header="Level 4" />
<TreeViewItem Header="Level 4" />
<TreeViewItem Header="Level 4" />
<TreeViewItem Header="Level 4" />
</TreeViewItem>
<TreeViewItem Header="Level 3" />
<TreeViewItem Header="Level 3" />
<TreeViewItem Header="Level 3" />
<TreeViewItem Header="Level 3" />
<TreeViewItem Header="Level 3" />
<TreeViewItem Header="Level 3" />
<TreeViewItem Header="Level 3" />
</TreeViewItem>
<TreeViewItem Header="Level 3" />
<TreeViewItem Header="Level 3" />
<TreeViewItem Header="Level 3" />
<TreeViewItem Header="Level 3" />
<TreeViewItem Header="Level 3" />
<TreeViewItem Header="Level 3" />
<TreeViewItem Header="Level 3" />
</TreeViewItem>
</TreeViewItem>
</TreeView>
<TreeView ItemsSource="{Binding Items}">
<TreeView.ItemTemplate>
<TreeDataTemplate ItemsSource="{Binding Items}">
<TextBlock Text="{Binding Name}" />
</TreeDataTemplate>
</TreeView.ItemTemplate>
</TreeView>
</StackPanel>
</TreeView>
</Border>
<Border Grid.Column="1" Theme="{StaticResource CardBorder}">
<TreeView Margin="0,10" ItemsSource="{Binding Items}">
<TreeView.ItemTemplate>
<TreeDataTemplate ItemsSource="{Binding Items}">
<TextBlock Text="{Binding Name}" />
</TreeDataTemplate>
</TreeView.ItemTemplate>
</TreeView>
</Border>
<Border Grid.Column="2" Theme="{StaticResource CardBorder}">
<TreeView ItemsSource="{Binding MultipleLevelItems}">
<TreeView.DataTemplates>
<TreeDataTemplate DataType="models:FirstItem" ItemsSource="{Binding SecondItems}">
<TextBlock Text="{Binding Name}" />
</TreeDataTemplate>
<TreeDataTemplate DataType="models:SecondItem" ItemsSource="{Binding ThirdItemItems}">
<TextBlock Text="{Binding Name}" />
</TreeDataTemplate>
<TreeDataTemplate DataType="models:ThirdItem">
<TextBlock Text="{Binding Name}" />
</TreeDataTemplate>
</TreeView.DataTemplates>
</TreeView>
</Border>
</Grid>
</UserControl>

44
demo/Semi.Avalonia.Demo/Pages/TreeViewDemo.axaml.cs
View File

@ -19,6 +19,8 @@ public class TreeViewVm : ObservableObject
{
public ObservableCollection<TreeViewItemVm> Items { get; set; }
public ObservableCollection<FirstItem>? MultipleLevelItems { get; set; }
public TreeViewVm()
{
Items = new ObservableCollection<TreeViewItemVm>()
@ -33,6 +35,25 @@ public class TreeViewVm : ObservableObject
},
},
};
MultipleLevelItems = new();
for (int i = 1; i < 6; i++)
{
FirstItem firstItem = new FirstItem { Id = i, Name = $"FirstItem {i}" };
firstItem.SecondItems = new();
for (int j = 1; j < 6; j++)
{
SecondItem secondItem = new SecondItem { Id = j, Name = $"SecondItem {j}" };
secondItem.ThirdItemItems = new();
for (int k = 1; k < 6; k++)
{
ThirdItem thirdItem = new ThirdItem { Id = k, Name = $"ThirdItem {k}" };
secondItem.ThirdItemItems.Add(thirdItem);
}
firstItem.SecondItems.Add(secondItem);
}
MultipleLevelItems.Add(firstItem);
}
}
}
@ -41,4 +62,25 @@ public partial class TreeViewItemVm : ObservableObject
public ObservableCollection<TreeViewItemVm> Items { get; set; }
public string Name { get; set; }
public string Id { get; set; }
}
}
public class ItemBase
{
public int Id { get; set; }
public string? Name { get; set; }
}
public class FirstItem : ItemBase
{
public ObservableCollection<SecondItem>? SecondItems { get; set; }
}
public class SecondItem : ItemBase
{
public ObservableCollection<ThirdItem>? ThirdItemItems { get; set; }
}
public class ThirdItem : ItemBase
{
}