回答編集履歴
1
見直しキャンペーン中
answer
CHANGED
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@@ -1,133 +1,133 @@
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`ComboBox`の選択肢は個々のアイテム（`DataGrid`の行）の１項目であって、全く別のものであるはずです。
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-
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なので`Gender`と`Item`に分けました。
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`Gender`はクラスでもいいのですが、扱いにくいので列挙型にしました。
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5
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列挙型と表示文字列の対応付けはいろいろありますが、元コードと近い`Dictionary`方式にしました。
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```
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<Window
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x:Class="Questions302281.MainWindow"
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xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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Width="530"
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Height="350">
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<Window.Resources>
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<CollectionViewSource x:Key="GenderDictSource" Source="{Binding GenderDict}" />
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</Window.Resources>
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<Grid>
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<DataGrid
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AutoGenerateColumns="False"
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CanUserAddRows="False"
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ItemsSource="{Binding Items}">
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<DataGrid.Columns>
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<DataGridTemplateColumn Header="金額（税率）">
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<DataGridTemplateColumn.CellTemplate>
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<DataTemplate>
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<StackPanel Orientation="Horizontal">
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<TextBlock Text="{Binding Price, StringFormat={}{0} 円}" />
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<TextBlock Text="{Binding Tax, StringFormat=（{0}%）}" />
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</StackPanel>
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</DataTemplate>
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</DataGridTemplateColumn.CellTemplate>
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</DataGridTemplateColumn>
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<!--<DataGridTextColumn Header="金額（税率）">
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<DataGridTextColumn.Binding>
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<MultiBinding StringFormat="{}{0} 円（{1}%）">
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<Binding Path="Price" />
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<Binding Path="Tax" />
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</MultiBinding>
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</DataGridTextColumn.Binding>
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</DataGridTextColumn>-->
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<DataGridTemplateColumn Header="コンボボックス列">
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<DataGridTemplateColumn.CellTemplate>
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<DataTemplate>
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<ComboBox
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DisplayMemberPath="Value"
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ItemsSource="{Binding DataContext.GenderDict, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type DataGrid}}}"
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SelectedValue="{Binding Sex, UpdateSourceTrigger=PropertyChanged}"
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SelectedValuePath="Key" />
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</DataTemplate>
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</DataGridTemplateColumn.CellTemplate>
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</DataGridTemplateColumn>
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<DataGridComboBoxColumn
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DisplayMemberPath="Value"
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Header="DataGridComboBoxColumn"
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ItemsSource="{Binding Source={StaticResource GenderDictSource}}"
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SelectedValueBinding="{Binding Sex}"
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SelectedValuePath="Key" />
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</DataGrid.Columns>
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</DataGrid>
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<Button
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HorizontalAlignment="Left"
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VerticalAlignment="Bottom"
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Click="Button_Click"
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Content="値の確認" />
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</Grid>
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</Window>
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```
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```
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.Diagnostics;
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using System.Windows;
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namespace Questions302281
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{
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public enum Gender
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{
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Unknown,
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Male,
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Female,
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}
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public class Item
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{
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public string Syouhinmei { get; set; }
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public int Price { get; set; }
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public double Tax { get; set; }
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public Gender Sex { get; set; }
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}
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public partial class MainWindow : Window
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{
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public Dictionary<Gender, string> GenderDict { get; }
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public ObservableCollection<Item> Items { get; }
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public MainWindow()
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{
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InitializeComponent();
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DataContext = this;
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GenderDict = new Dictionary<Gender, string>
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{
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{ Gender.Unknown, "？" },
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{ Gender.Male, "♂" },
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{ Gender.Female, "♀" },
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};
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Items = new ObservableCollection<Item>
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{
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new Item { Syouhinmei = "化粧品", Price = 1900, Tax = 10, Sex = Gender.Female },
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new Item { Syouhinmei = "洗剤", Price = 500, Tax = 10, Sex = Gender.Male },
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116
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new Item { Syouhinmei = "パン", Price = 800, Tax = 8, Sex = Gender.Male },
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new Item { Syouhinmei = "牛乳", Price = 800, Tax = 8 },
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};
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}
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private void Button_Click(object sender, RoutedEventArgs e)
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{
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foreach(var irem in Items)
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{
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Debug.WriteLine($"Price:{irem.Price}, Sex:{irem.Sex}");
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}
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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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132
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1
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+
`ComboBox`の選択肢は個々のアイテム（`DataGrid`の行）の１項目であって、全く別のものであるはずです。
|
|
2
|
+
|
|
3
|
+
なので`Gender`と`Item`に分けました。
|
|
4
|
+
`Gender`はクラスでもいいのですが、扱いにくいので列挙型にしました。
|
|
5
|
+
列挙型と表示文字列の対応付けはいろいろありますが、元コードと近い`Dictionary`方式にしました。
|
|
6
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+
|
|
7
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+
```xml
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8
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+
<Window
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9
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+
x:Class="Questions302281.MainWindow"
|
|
10
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+
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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11
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+
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
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12
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Width="530"
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13
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Height="350">
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14
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+
<Window.Resources>
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|
15
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<CollectionViewSource x:Key="GenderDictSource" Source="{Binding GenderDict}" />
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16
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</Window.Resources>
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17
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<Grid>
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18
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<DataGrid
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19
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AutoGenerateColumns="False"
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20
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CanUserAddRows="False"
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21
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ItemsSource="{Binding Items}">
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22
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<DataGrid.Columns>
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23
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<DataGridTemplateColumn Header="金額（税率）">
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24
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<DataGridTemplateColumn.CellTemplate>
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25
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<DataTemplate>
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26
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<StackPanel Orientation="Horizontal">
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27
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<TextBlock Text="{Binding Price, StringFormat={}{0} 円}" />
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28
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<TextBlock Text="{Binding Tax, StringFormat=（{0}%）}" />
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29
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</StackPanel>
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30
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</DataTemplate>
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31
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</DataGridTemplateColumn.CellTemplate>
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32
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</DataGridTemplateColumn>
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33
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<!--<DataGridTextColumn Header="金額（税率）">
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34
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<DataGridTextColumn.Binding>
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35
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<MultiBinding StringFormat="{}{0} 円（{1}%）">
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36
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<Binding Path="Price" />
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37
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<Binding Path="Tax" />
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38
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</MultiBinding>
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39
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</DataGridTextColumn.Binding>
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40
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</DataGridTextColumn>-->
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41
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+
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42
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<DataGridTemplateColumn Header="コンボボックス列">
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43
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<DataGridTemplateColumn.CellTemplate>
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44
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<DataTemplate>
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45
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<ComboBox
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46
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DisplayMemberPath="Value"
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47
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ItemsSource="{Binding DataContext.GenderDict, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type DataGrid}}}"
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48
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SelectedValue="{Binding Sex, UpdateSourceTrigger=PropertyChanged}"
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49
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SelectedValuePath="Key" />
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50
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</DataTemplate>
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51
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</DataGridTemplateColumn.CellTemplate>
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</DataGridTemplateColumn>
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<DataGridComboBoxColumn
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DisplayMemberPath="Value"
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Header="DataGridComboBoxColumn"
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ItemsSource="{Binding Source={StaticResource GenderDictSource}}"
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SelectedValueBinding="{Binding Sex}"
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SelectedValuePath="Key" />
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</DataGrid.Columns>
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</DataGrid>
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<Button
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HorizontalAlignment="Left"
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VerticalAlignment="Bottom"
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Click="Button_Click"
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67
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Content="値の確認" />
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68
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</Grid>
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69
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</Window>
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70
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```
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71
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72
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```cs
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73
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using System.Collections.Generic;
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74
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+
using System.Collections.ObjectModel;
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75
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+
using System.Diagnostics;
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76
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using System.Windows;
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77
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+
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78
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namespace Questions302281
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79
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{
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80
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public enum Gender
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81
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{
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82
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Unknown,
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83
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Male,
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84
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Female,
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85
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}
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86
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87
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public class Item
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88
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{
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89
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public string Syouhinmei { get; set; }
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90
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public int Price { get; set; }
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91
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public double Tax { get; set; }
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92
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public Gender Sex { get; set; }
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93
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}
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94
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+
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95
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public partial class MainWindow : Window
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96
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{
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97
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public Dictionary<Gender, string> GenderDict { get; }
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98
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public ObservableCollection<Item> Items { get; }
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99
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100
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public MainWindow()
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101
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{
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102
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InitializeComponent();
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103
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DataContext = this;
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104
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105
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GenderDict = new Dictionary<Gender, string>
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106
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{
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107
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{ Gender.Unknown, "？" },
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108
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{ Gender.Male, "♂" },
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109
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{ Gender.Female, "♀" },
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110
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};
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111
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112
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Items = new ObservableCollection<Item>
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113
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{
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114
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new Item { Syouhinmei = "化粧品", Price = 1900, Tax = 10, Sex = Gender.Female },
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115
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new Item { Syouhinmei = "洗剤", Price = 500, Tax = 10, Sex = Gender.Male },
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116
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new Item { Syouhinmei = "パン", Price = 800, Tax = 8, Sex = Gender.Male },
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117
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new Item { Syouhinmei = "牛乳", Price = 800, Tax = 8 },
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118
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};
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119
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}
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120
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121
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private void Button_Click(object sender, RoutedEventArgs e)
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122
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{
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123
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foreach(var irem in Items)
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124
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{
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125
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Debug.WriteLine($"Price:{irem.Price}, Sex:{irem.Sex}");
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126
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}
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127
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Debug.WriteLine("");
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128
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}
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129
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}
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130
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}
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131
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```
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132
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+
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133
133
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コード側から`Item`の中身を変更する場合は、ikarimameさんの言うように`INotifyPropertyChanged`の実装が必要です。
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