DataGridの変更内容を元ソースに反映させたい

前提・実現したいこと

下記のコードでは、DataGridに表示、ボタン押下で再表示をしています。
（DataGridの値を変更しても、元に戻る）

これを修正して、DataGridの値の変更をソース配列に反映させる様な動作を実現したいです。
（DataGridの変更内容が残る形にしたい）

ご協力をお願い致します。

該当のソースコード

XAML
1<DataGrid x:Name="dataGrid" Margin="10" AutoGenerateColumns="False" SourceUpdated="DataGrid_SourceUpdated">
2    <DataGrid.Columns>
3        <DataGridTextColumn Header="Name" Width="80"  
4                            Binding="{Binding Data_Name, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}" />
5        <DataGridTextColumn Header="Code" Width="100"  
6                            Binding="{Binding Data_Code, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}" />
7        <DataGridTextColumn Header="Enable" Width="*"  
8                            Binding="{Binding Data_Enable, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}" />
9    </DataGrid.Columns>
10</DataGrid>
11<Button Content="Button" HorizontalAlignment="Left" Margin="355,353,0,0" VerticalAlignment="Top" Width="75" Height="56" Click="Button_Click"/>

C#
1public ObservableCollection<DataGrid_Data> Source_DG = new ObservableCollection<DataGrid_Data>();
2
3public string[] ItemNames = { "AAA", "BBB", "CCC", "DDD" };
4public string[] ItemCodes = { "aaa", "bbb", "ccc", "ddd" };
5public string[] ItemEnables = { "111", "222", "333", "444" };
6
7public MainWindow()
8{
9    InitializeComponent();
10
11    for(int i = 0; i < ItemNames.Length; i++)
12    {
13        Source_DG.Add(new DataGrid_Data(ItemNames[i], ItemCodes[i], ItemEnables[i]) { });
14    }
15
16    dataGrid.ItemsSource = Source_DG;
17}
18
19public class DataGrid_Data
20{
21    public string Data_Name { get; set; }
22    public string Data_Code { get; set; }
23    public string Data_Enable { get; set; }
24
25    public DataGrid_Data(string Name, string Code, string Enable)
26    {
27        Data_Name = Name;
28        Data_Code = Code;
29        Data_Enable = Enable;
30    }
31
32}
33
34private void DataGrid_SourceUpdated(object sender, DataTransferEventArgs e)
35{
36}
37
38private void Button_Click(object sender, RoutedEventArgs e)
39{
40    Source_DG.Clear();
41
42    for (int i = 0; i < ItemNames.Length; i++)
43    {
44        Source_DG.Add(new DataGrid_Data(ItemNames[i], ItemCodes[i], ItemEnables[i]) { });
45    }
46
47    dataGrid.ItemsSource = Source_DG;
48}

前提・実現したいこと（追記）

上記のコードから、DataGridのソース元を配列から2次元Listに変更しました。

該当のソースコード

C#
1public ObservableCollection<DataGrid_Data> Source_DG = new ObservableCollection<DataGrid_Data>();
2
3public List<List<string>> ItemNames = new List<List<string>>();  //リスト化
4public List<List<string>> ItemCodes = new List<List<string>>();  //リスト化
5public List<List<string>> ItemEnables = new List<List<string>>();  //リスト化
6
7
8public string[] str_ItemNames = { "AAA", "BBB", "CCC", "DDD" };
9public string[] str_ItemCodes = { "aaa", "bbb", "ccc", "ddd" };
10public string[] str_ItemEnables = { "111", "222", "333", "444" };
11public string[] str_Dummys = { "0", "00", "000", "0000" };
12
13public int group = 0;
14
15public MainWindow()
16{
17    InitializeComponent();
18
19
20    Init_ItemList();
21
22
23    for (int i = 0; i < str_ItemCodes.Length; i++)
24    {
25        Source_DG.Add(new DataGrid_Data(ItemNames[group][i], ItemCodes[group][i], ItemEnables[group][i]) { });
26    }
27
28    dataGrid.ItemsSource = Source_DG;
29}
30
31public void Init_ItemList()
32{
33    for (int i = 0; i < 4; i++)
34    {
35        ItemNames.Add(new List<string>());
36        ItemCodes.Add(new List<string>());
37        ItemEnables.Add(new List<string>());
38    }
39
40    ItemNames[group].AddRange(str_ItemNames);
41    ItemCodes[group].AddRange(str_ItemCodes);
42    ItemEnables[group].AddRange(str_ItemEnables);
43
44    ItemNames[group + 1].AddRange(str_Dummys);
45    ItemCodes[group + 1].AddRange(str_Dummys);
46    ItemEnables[group + 1].AddRange(str_Dummys);
47
48    ItemNames[group +2].AddRange(str_ItemNames);
49    ItemCodes[group +2].AddRange(str_ItemCodes);
50    ItemEnables[group +2].AddRange(str_ItemEnables);
51}
52
53
54public class DataGrid_Data
55{
56    public string Data_Name { get; set; }
57    public string Data_Code { get; set; }
58    public string Data_Enable { get; set; }
59
60    public DataGrid_Data(string Name, string Code, string Enable)
61    {
62        Data_Name = Name;
63        Data_Code = Code;
64        Data_Enable = Enable;
65    }
66}
67
68private void Button1_Click(object sender, RoutedEventArgs e)
69{
70    group = int.Parse(TextBox.Text);
71
72    Source_DG.Clear();
73
74    for (int i = 0; i < str_ItemCodes.Length; i++)
75    {
76        Source_DG.Add(new DataGrid_Data(ItemNames[group][i], ItemCodes[group][i], ItemEnables[group][i]) { });
77    }
78
79    dataGrid.ItemsSource = Source_DG;
80}
81
82private void Button2_Click(object sender, RoutedEventArgs e)
83{
84    /*
85    ItemNames = Source_DG.Select(x => x.Data_Name).ToArray();
86    ItemCodes = Source_DG.Select(x => x.Data_Code).ToArray();
87    ItemEnables = Source_DG.Select(x => x.Data_Enable).ToArray();
88    */
89}

行動規範の内容に同意します

回答1件

ベストアンサー

こういうことですか？

cs
1private void Button_Click(object sender, RoutedEventArgs e)
2{
3    ItemNames = Source_DG.Select(x => x.Data_Name).ToArray();
4    ItemCodes = Source_DG.Select(x => x.Data_Code).ToArray();
5    ItemEnables = Source_DG.Select(x => x.Data_Enable).ToArray();
6}

赤線が出たらusing System.Linq;を上のほうに追加してください。

意図があっているのか自信ありませんが、こうですか？

cs
1private void Button1_Click(object sender, RoutedEventArgs e)
2{
3    group = int.Parse(TextBox.Text);
4
5    ItemNames[group] = Source_DG.Select(x => x.Data_Name).ToList();
6    ItemCodes[group] = Source_DG.Select(x => x.Data_Code).ToList();
7    ItemEnables[group] = Source_DG.Select(x => x.Data_Enable).ToList();
8}