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Merge pull request #1 from SyncfusionExamples/checkbox_Column
Maui-[959509]-Added KB sample for implementing Select All checkbox column in .NET MAUI DataGrid.
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‎README.md‎

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# How-to-implement-select-all-checkbox-column-in-.NET-MAUI-DataGrid-SfDataGrid
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This demo shows how to implement a Select All checkbox functionality within a checkbox column in the .NET MAUI DataGrid (SfDataGrid)?
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# How to implement select all checkbox column in .NET MAUI DataGrid(SfDataGrid) ?
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This sample demonstrates how to implement a **Select All** checkbox column in the Syncfusion [.NET MAUI DataGrid](https://help.syncfusion.com/maui/datagrid/overview) (`SfDataGrid`). It allows users to select or deselect all rows using a single checkbox in the header, while also enabling individual row selection.
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## Xaml
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```
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<ContentPage.BindingContext>
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<local:SampleViewModel x:Name="viewModel" />
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</ContentPage.BindingContext>
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<syncfusion:SfDataGrid x:Name="SampleGrid"
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HeaderGridLinesVisibility="Both"
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GridLinesVisibility="Both"
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ItemsSource="{Binding Items}"
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ColumnWidthMode="Auto"
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AutoGenerateColumnsMode="None">
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<syncfusion:SfDataGrid.Columns>
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<syncfusion:DataGridTemplateColumn HeaderText="Select All">
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<syncfusion:DataGridTemplateColumn.HeaderTemplate>
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<DataTemplate>
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<buttons:SfCheckBox x:Name="checkBox"
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BindingContext="{Binding Source={x:Reference MyPage},Path=BindingContext}"
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IsThreeState="True"
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IsChecked="{Binding SelectAllChecked,Mode=TwoWay}"
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StateChanged="SfCheckBox_StateChanged_1" />
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</DataTemplate>
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</syncfusion:DataGridTemplateColumn.HeaderTemplate>
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<syncfusion:DataGridTemplateColumn.CellTemplate>
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<DataTemplate>
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<buttons:SfCheckBox IsChecked="{Binding IsChecked}" StateChanged="SfCheckBox_StateChanged" />
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</DataTemplate>
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</syncfusion:DataGridTemplateColumn.CellTemplate>
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</syncfusion:DataGridTemplateColumn>
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<syncfusion:DataGridCheckBoxColumn MappingName="SelectAllChecked"
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HeaderText="SelectAll" />
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<syncfusion:DataGridTextColumn HeaderText="Name"
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MappingName="Name" />
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<syncfusion:DataGridTextColumn HeaderText="Description"
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MappingName="Description" />
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<syncfusion:DataGridTextColumn HeaderText="Category"
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MappingName="Category" />
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<syncfusion:DataGridTextColumn HeaderText="Price"
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MappingName="Price" />
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</syncfusion:SfDataGrid.Columns>
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</syncfusion:SfDataGrid>
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```
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## Xaml.cs
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```
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public partial class MainPage : ContentPage
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{
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public MainPage()
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{
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InitializeComponent();
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}
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private void SfCheckBox_StateChanged(object sender, Syncfusion.Maui.Buttons.StateChangedEventArgs e)
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{
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var viewModel = BindingContext as SampleViewModel;
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if (viewModel != null && !viewModel._isUpdating)
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{
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viewModel._isUpdating = true;
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if (viewModel.Items.All(x => x.IsChecked == true))
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{
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viewModel.SelectAllChecked = true;
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}
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else if (viewModel.Items.All(x => x.IsChecked == false))
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{
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viewModel.SelectAllChecked = false;
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}
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else
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{
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viewModel.SelectAllChecked = null;
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}
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viewModel._isUpdating = false;
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}
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}
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private void SfCheckBox_StateChanged_1(object sender, StateChangedEventArgs e)
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{
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var viewModel = BindingContext as SampleViewModel;
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if (viewModel != null)
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{
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if (!viewModel._isUpdating)
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{
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viewModel._isUpdating = true;
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foreach (var item in viewModel.Items)
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{
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item.IsChecked = viewModel.SelectAllChecked;
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}
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viewModel._isUpdating = false;
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}
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}
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}
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}
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```
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### ScreenShot
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<img src="https://support.syncfusion.com/kb/agent/attachment/inline?token=eyJhbGciOiJodHRwOi8vd3d3LnczLm9yZy8yMDAxLzA0L3htbGRzaWctbW9yZSNobWFjLXNoYTI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjQwNjY0Iiwib3JnaWQiOiIzIiwiaXNzIjoic3VwcG9ydC5zeW5jZnVzaW9uLmNvbSJ9._kkYJ5p5hPQUfYUfJ9Tbpuq3TZDI6S2xwqSCG5dzUKs" width=800/>
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[View sample in GitHub](https://github.com/SyncfusionExamples/How-to-implement-select-all-checkbox-column-in-.NET-MAUI-DataGrid-SfDataGrid)
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Take a moment to explore this [documentation](https://help.syncfusion.com/maui/datagrid/overview), where you can find more information about Syncfusion .NET MAUI DataGrid (SfDataGrid) with code examples. Please refer to this [link](https://www.syncfusion.com/maui-controls/maui-datagrid) to learn about the essential features of Syncfusion .NET MAUI DataGrid (SfDataGrid).
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### Conclusion
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I hope you enjoyed learning about How to implement select all checkbox column in SfDataGrid.
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You can refer to our [.NET MAUI DataGrid’s feature tour](https://www.syncfusion.com/maui-controls/maui-datagrid) page to learn about its other groundbreaking feature representations. You can also explore our [.NET MAUI DataGrid Documentation](https://help.syncfusion.com/maui/datagrid/getting-started) to understand how to present and manipulate data. For current customers, you can check out our .NET MAUI components on the [License and Downloads](https://www.syncfusion.com/sales/teamlicense) page. If you are new to Syncfusion, you can try our 30-day [free trial](https://www.syncfusion.com/downloads/maui) to explore our .NET MAUI DataGrid and other .NET MAUI components.
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If you have any queries or require clarifications, please let us know in the comments below. You can also contact us through our [support forums](https://www.syncfusion.com/forums),[Direct-Trac](https://support.syncfusion.com/create) or [feedback portal](https://www.syncfusion.com/feedback/maui?control=sfdatagrid), or the feedback portal. We are always happy to assist you!

‎SfDataGridSample/SfDataGridSample.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 17
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VisualStudioVersion = 17.13.35931.197 d17.13
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SfDataGridSample", "SfDataGridSample\SfDataGridSample.csproj", "{8B0CCADE-31B6-4C6A-B038-B53AE93C5D0F}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{8B0CCADE-31B6-4C6A-B038-B53AE93C5D0F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{8B0CCADE-31B6-4C6A-B038-B53AE93C5D0F}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{8B0CCADE-31B6-4C6A-B038-B53AE93C5D0F}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{8B0CCADE-31B6-4C6A-B038-B53AE93C5D0F}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {1CBF420A-4749-4271-B943-FF96A0038D46}
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EndGlobalSection
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EndGlobal

‎SfDataGridSample/SfDataGridSample/App.xaml‎

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<?xml version = "1.0" encoding = "UTF-8" ?>
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<Application xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
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xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
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xmlns:local="clr-namespace:SfDataGridSample"
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x:Class="SfDataGridSample.App">
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<Application.Resources>
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<ResourceDictionary>
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<ResourceDictionary.MergedDictionaries>
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<ResourceDictionary Source="Resources/Styles/Colors.xaml" />
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<ResourceDictionary Source="Resources/Styles/Styles.xaml" />
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</ResourceDictionary.MergedDictionaries>
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</ResourceDictionary>
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</Application.Resources>
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</Application>

‎SfDataGridSample/SfDataGridSample/App.xaml.cs‎

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namespace SfDataGridSample
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{
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public partial class App : Application
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{
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public App()
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{
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InitializeComponent();
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}
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protected override Window CreateWindow(IActivationState? activationState)
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{
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return new Window(new AppShell());
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}
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}
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}

‎SfDataGridSample/SfDataGridSample/AppShell.xaml‎

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<?xml version="1.0" encoding="UTF-8" ?>
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<Shell
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x:Class="SfDataGridSample.AppShell"
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xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
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xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
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xmlns:local="clr-namespace:SfDataGridSample"
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Shell.FlyoutBehavior="Flyout"
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Title="SfDataGridSample">
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<ShellContent
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Title="Home"
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ContentTemplate="{DataTemplate local:MainPage}"
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Route="MainPage" />
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</Shell>

‎SfDataGridSample/SfDataGridSample/AppShell.xaml.cs‎

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namespace SfDataGridSample
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{
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public partial class AppShell : Shell
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{
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public AppShell()
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{
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InitializeComponent();
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}
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}
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}

‎SfDataGridSample/SfDataGridSample/MainPage.xaml‎

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<?xml version="1.0" encoding="utf-8" ?>
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<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
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xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
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x:Name="MyPage"
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xmlns:syncfusion="clr-namespace:Syncfusion.Maui.DataGrid;assembly=Syncfusion.Maui.DataGrid"
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xmlns:buttons="clr-namespace:Syncfusion.Maui.Buttons;assembly=Syncfusion.Maui.Buttons"
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xmlns:listView="clr-namespace:Syncfusion.Maui.ListView;assembly=Syncfusion.Maui.ListView"
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xmlns:local="clr-namespace:SfDataGridSample.ViewModel"
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x:Class="SfDataGridSample.MainPage">
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<ContentPage.BindingContext>
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<local:SampleViewModel x:Name="viewModel" />
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</ContentPage.BindingContext>
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<Grid Padding="10">
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<syncfusion:SfDataGrid x:Name="SampleGrid"
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HeaderGridLinesVisibility="Both"
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GridLinesVisibility="Both"
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ItemsSource="{Binding Items}"
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ColumnWidthMode="Auto"
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AutoGenerateColumnsMode="None">
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<syncfusion:SfDataGrid.Columns>
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<syncfusion:DataGridTemplateColumn HeaderText="Select All">
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<syncfusion:DataGridTemplateColumn.HeaderTemplate>
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<DataTemplate>
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<buttons:SfCheckBox x:Name="checkBox"
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BindingContext="{Binding Source={x:Reference MyPage},Path=BindingContext}"
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IsThreeState="True"
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IsChecked="{Binding SelectAllChecked,Mode=TwoWay}"
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StateChanged="SfCheckBox_StateChanged_1" />
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</DataTemplate>
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</syncfusion:DataGridTemplateColumn.HeaderTemplate>
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<syncfusion:DataGridTemplateColumn.CellTemplate>
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<DataTemplate>
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<buttons:SfCheckBox IsChecked="{Binding IsChecked}" StateChanged="SfCheckBox_StateChanged" />
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</DataTemplate>
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</syncfusion:DataGridTemplateColumn.CellTemplate>
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</syncfusion:DataGridTemplateColumn>
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<syncfusion:DataGridCheckBoxColumn MappingName="SelectAllChecked"
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HeaderText="SelectAll" />
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<syncfusion:DataGridTextColumn HeaderText="Name"
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MappingName="Name" />
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<syncfusion:DataGridTextColumn HeaderText="Description"
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MappingName="Description" />
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<syncfusion:DataGridTextColumn HeaderText="Category"
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MappingName="Category" />
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<syncfusion:DataGridTextColumn HeaderText="Price"
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MappingName="Price" />
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</syncfusion:SfDataGrid.Columns>
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</syncfusion:SfDataGrid>
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</Grid>
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</ContentPage>

‎SfDataGridSample/SfDataGridSample/MainPage.xaml.cs‎

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using SfDataGridSample.ViewModel;
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using Syncfusion.Maui.Buttons;
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namespace SfDataGridSample
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{
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public partial class MainPage : ContentPage
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{
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public MainPage()
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{
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InitializeComponent();
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}
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private void SfCheckBox_StateChanged(object sender, Syncfusion.Maui.Buttons.StateChangedEventArgs e)
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{
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var viewModel = BindingContext as SampleViewModel;
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if (viewModel != null && !viewModel._isUpdating)
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{
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viewModel._isUpdating = true;
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if (viewModel.Items.All(x => x.IsChecked == true))
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{
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viewModel.SelectAllChecked = true;
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}
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else if (viewModel.Items.All(x => x.IsChecked == false))
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{
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viewModel.SelectAllChecked = false;
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}
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else
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{
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viewModel.SelectAllChecked = null;
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}
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viewModel._isUpdating = false;
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}
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}
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private void SfCheckBox_StateChanged_1(object sender, StateChangedEventArgs e)
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{
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var viewModel = BindingContext as SampleViewModel;
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if (viewModel != null)
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{
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if (!viewModel._isUpdating)
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{
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viewModel._isUpdating = true;
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foreach (var item in viewModel.Items)
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{
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item.IsChecked = viewModel.SelectAllChecked;
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}
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viewModel._isUpdating = false;
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}
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}
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}
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}
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}

‎SfDataGridSample/SfDataGridSample/MauiProgram.cs‎

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using Microsoft.Extensions.Logging;
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using Syncfusion.Maui.Core.Hosting;
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namespace SfDataGridSample
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{
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public static class MauiProgram
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{
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public static MauiApp CreateMauiApp()
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{
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var builder = MauiApp.CreateBuilder();
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builder
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.UseMauiApp<App>().ConfigureSyncfusionCore()
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.ConfigureFonts(fonts =>
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{
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fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
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fonts.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold");
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});
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#if DEBUG
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builder.Logging.AddDebug();
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#endif
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return builder.Build();
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}
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}
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}

‎SfDataGridSample/SfDataGridSample/Model/ItemModel.cs‎

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using System.ComponentModel;
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using System.Runtime.CompilerServices;
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namespace SfDataGridSample.Model
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{
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public class ItemModel : INotifyPropertyChanged
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{
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private bool? _isChecked;
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public string Name { get; set; }
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public string Description { get; set; }
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public string Category { get; set; }
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public double Price { get; set; }
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public int Stock { get; set; }
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public string SKU { get; set; }
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public string Supplier { get; set; }
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public string Location { get; set; }
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public double Discount { get; set; }
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public double Rating { get; set; }
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public bool? IsChecked
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{
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get => _isChecked;
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set
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{
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if (_isChecked != value)
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{
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_isChecked = value;
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OnPropertyChanged();
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}
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}
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}
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public event PropertyChangedEventHandler PropertyChanged;
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protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
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{
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
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}
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}
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}

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