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Windows Formsの[DataGridView](https://docs.microsoft.com/ja-jp/dotnet/api/system.windows.forms.datagridview)と紛らわしいので、
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using System.
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using System.
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{
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new orgFileInfo{ FileName = "
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Debug.WriteLine("
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Debug.WriteLine("
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Windows Formsの[DataGridView](https://docs.microsoft.com/ja-jp/dotnet/api/system.windows.forms.datagridview)と紛らわしいので、[DataGrid](https://docs.microsoft.com/ja-jp/dotnet/api/system.windows.controls.datagrid)と正しく表記してください。
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> チェックボックスをチェックされた時に、対象のファイル名（DataContextで取得できる？）を取得したいが、取得できない。
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1. `sender`を`CheckBox`にキャスト
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1. さらに`CheckBox`の`DataContext`を`orgFileInfo`にキャスト
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で取得できます。
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```cs
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Windows;
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using System.Windows.Controls;
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namespace Questions340821
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{
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public partial class MainWindow : Window
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{
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public MainWindow()
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{
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InitializeComponent();
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forder1DataGrid.ItemsSource = new List<orgFileInfo>
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{
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new orgFileInfo{ FileName = "FileName1", Comment = "Comment1", },
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new orgFileInfo{ FileName = "FileName2", Comment = "Comment2", },
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new orgFileInfo{ FileName = "FileName3", Comment = "Comment3", },
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};
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}
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private void folder1_click(object sender, RoutedEventArgs e)
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{
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if (sender is CheckBox checkBox)
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{
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if (checkBox.DataContext is orgFileInfo info)
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{
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Debug.WriteLine("IsChecked:" + info.IsChecked);
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Debug.WriteLine("FileName:" + info.FileName);
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Debug.WriteLine("Comment:" + info.Comment);
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Debug.WriteLine("");
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}
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}
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}
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}
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}
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```
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