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LakshminatarajanLakshminatarajan
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Sample updated
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8 files changed

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-40
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‎ScreenShot/CheckBoxStateUpdateTreeViewXamarin.png‎

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‎TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.Android/TreeViewXamarin.Android.csproj‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -50,10 +50,10 @@
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</ItemGroup>
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<ItemGroup>
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<PackageReference Include="Syncfusion.Xamarin.Buttons">
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<Version>19.1.0.55</Version>
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<Version>19.1.0.57</Version>
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</PackageReference>
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<PackageReference Include="Syncfusion.Xamarin.SfTreeView">
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<Version>19.1.0.55</Version>
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<Version>19.1.0.57</Version>
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</PackageReference>
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<PackageReference Include="Xamarin.Forms" Version="4.5.0.617" />
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</ItemGroup>

‎TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.UWP/TreeViewXamarin.UWP.csproj‎

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@@ -144,10 +144,10 @@
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</ItemGroup>
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<ItemGroup>
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<PackageReference Include="Syncfusion.Xamarin.Buttons">
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<Version>19.1.0.55</Version>
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<Version>19.1.0.57</Version>
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</PackageReference>
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<PackageReference Include="Syncfusion.Xamarin.SfTreeView">
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<Version>19.1.0.55</Version>
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<Version>19.1.0.57</Version>
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</PackageReference>
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<PackageReference Include="Xamarin.Forms" Version="4.5.0.617" />
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<PackageReference Include="Microsoft.NETCore.UniversalWindowsPlatform" Version="6.1.5" />

‎TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.iOS/TreeViewXamarin.iOS.csproj‎

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@@ -149,10 +149,10 @@
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</ItemGroup>
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<ItemGroup>
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<PackageReference Include="Syncfusion.Xamarin.Buttons">
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<Version>19.1.0.55</Version>
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<Version>19.1.0.57</Version>
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</PackageReference>
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<PackageReference Include="Syncfusion.Xamarin.SfTreeView">
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<Version>19.1.0.55</Version>
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<Version>19.1.0.57</Version>
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</PackageReference>
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<PackageReference Include="Xamarin.Forms" Version="4.5.0.617" />
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</ItemGroup>

‎TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/Helper/TreeViewBehavior.cs‎

Lines changed: 22 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -45,36 +45,46 @@ private void UpdateCheckBoxState()
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var checkedNodes = TreeView.GetCheckedNodes();
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foreach (var node in checkedNodes)
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{
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//Update child nodes based on parent's checked state.
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if (node.ParentNode == null && node.HasChildNodes)
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{
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setChildChecked(node);
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//Update child nodes based on parent's checked state.
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SetChildChecked(node);
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}
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//Update parent node based on child's checked state.
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else if (node.ParentNode != null)
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else
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{
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if (node.ParentNode.ChildNodes.All(x => x.IsChecked == true))
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{
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node.ParentNode.IsChecked = true;
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}
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else node.ParentNode.IsChecked = null;
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//Update parent node based on child's checked state.
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SetParentChecked(node);
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}
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}
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}
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private void setChildChecked(TreeViewNode node)
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private void SetChildChecked(TreeViewNode node)
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{
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foreach (var child in node.ChildNodes)
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{
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child.IsChecked = true;
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if (child.HasChildNodes)
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{
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setChildChecked(child);
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SetChildChecked(child);
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}
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}
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}
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private void SetParentChecked(TreeViewNode node)
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{
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if (node.ParentNode == null) return;
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if (node.ParentNode.ChildNodes.All(x => x.IsChecked == true))
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node.ParentNode.IsChecked = true;
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else node.ParentNode.IsChecked = null;
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if(node.ParentNode != null)
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{
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SetParentChecked(node.ParentNode);
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}
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}
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#endregion
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}
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}

‎TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/TreeViewXamarin.csproj‎

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Original file line numberDiff line numberDiff line change
@@ -16,8 +16,8 @@
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</ItemGroup>
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<ItemGroup>
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<PackageReference Include="Syncfusion.Xamarin.Buttons" Version="19.1.0.55" />
20-
<PackageReference Include="Syncfusion.Xamarin.SfTreeView" Version="19.1.0.55" />
19+
<PackageReference Include="Syncfusion.Xamarin.Buttons" Version="19.1.0.57" />
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<PackageReference Include="Syncfusion.Xamarin.SfTreeView" Version="19.1.0.57" />
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<PackageReference Include="Xamarin.Forms" Version="4.5.0.617" />
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</ItemGroup>
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</Project>

‎TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/ViewModel/FileManagerViewModel.cs‎

Lines changed: 1 addition & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -111,8 +111,7 @@ private ObservableCollection<Folder> GetFiles()
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checkedItems.Add(doc);
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checkedItems.Add(typeScript);
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checkedItems.Add(uiGuide);
114-
checkedItems.Add(stone);
115-
checkedItems.Add(pictures);
114+
checkedItems.Add(img1);
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checkedItems.Add(song);
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return nodeImageInfo;

‎TreeViewXamarin/TreeViewXamarin/TreeViewXamarin/Views/MainPage.xaml‎

Lines changed: 19 additions & 18 deletions
Original file line numberDiff line numberDiff line change
@@ -11,26 +11,27 @@
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<local:FileManagerViewModel x:Name="viewModel"/>
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</ContentPage.BindingContext>
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14-
<treeView:SfTreeView x:Name="treeView"
14+
<StackLayout>
15+
<treeView:SfTreeView x:Name="treeView"
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ItemsSource="{Binding Folders}"
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ItemTemplateContextType="Node"
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AutoExpandMode="AllNodesExpanded"
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CheckedItems="{Binding CheckedItems}">
19-
<treeView:SfTreeView.Behaviors>
20-
<local:TreeViewBehavior/>
21-
</treeView:SfTreeView.Behaviors>
22-
<treeView:SfTreeView.HierarchyPropertyDescriptors>
23-
<TreeViewEngine:HierarchyPropertyDescriptor TargetType="{x:Type local:Folder}" ChildPropertyName="Files"/>
24-
<TreeViewEngine:HierarchyPropertyDescriptor TargetType="{x:Type local:File}" ChildPropertyName="SubFiles"/>
25-
</treeView:SfTreeView.HierarchyPropertyDescriptors>
20+
<treeView:SfTreeView.Behaviors>
21+
<local:TreeViewBehavior/>
22+
</treeView:SfTreeView.Behaviors>
23+
<treeView:SfTreeView.HierarchyPropertyDescriptors>
24+
<TreeViewEngine:HierarchyPropertyDescriptor TargetType="{x:Type local:Folder}" ChildPropertyName="Files"/>
25+
<TreeViewEngine:HierarchyPropertyDescriptor TargetType="{x:Type local:File}" ChildPropertyName="SubFiles"/>
26+
</treeView:SfTreeView.HierarchyPropertyDescriptors>
2627

27-
<treeView:SfTreeView.ItemTemplate>
28-
<DataTemplate>
29-
<Grid Padding="5">
30-
<SfButtons:SfCheckBox x:Name="CheckBox" Text="{Binding Content.FileName}" IsChecked="{Binding IsChecked, Mode=TwoWay}"/>
31-
</Grid>
32-
</DataTemplate>
33-
</treeView:SfTreeView.ItemTemplate>
34-
</treeView:SfTreeView>
35-
36-
</ContentPage>
28+
<treeView:SfTreeView.ItemTemplate>
29+
<DataTemplate>
30+
<Grid Padding="5">
31+
<SfButtons:SfCheckBox x:Name="CheckBox" Text="{Binding Content.FileName}" IsChecked="{Binding IsChecked, Mode=TwoWay}"/>
32+
</Grid>
33+
</DataTemplate>
34+
</treeView:SfTreeView.ItemTemplate>
35+
</treeView:SfTreeView>
36+
</StackLayout>
37+
</ContentPage>

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