回答編集履歴
1
見直しキャンペーン中
answer
CHANGED
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@@ -1,116 +1,116 @@
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`image_[x] = new Image();`こうしたところで、元の`ButtonImage_0`等には何の影響もありません。
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`Image`はすでにxamlで配置しているわけですから新たに作る必要はなく、`Source`を変更するだけでいいのです^^
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```
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<Window
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x:Class="Questions372108.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="800"
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Height="450">
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<StackPanel>
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<UniformGrid Rows="1">
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<Button x:Name="Button_0" Click="Button_Click" Content="Button_0" />
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<Button x:Name="Button_1" Click="Button_Click" Content="Button_1" />
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<Button x:Name="Button_2" Click="Button_Click" Content="Button_2" />
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<Button x:Name="Button_3" Click="Button_Click" Content="Button_3" />
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<Button x:Name="Button_4" Click="Button_Click" Content="Button_4" />
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</UniformGrid>
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<UniformGrid Rows="1">
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<Image x:Name="ButtonImage_0" IsHitTestVisible="False" />
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<Image x:Name="ButtonImage_1" IsHitTestVisible="False" />
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<Image x:Name="ButtonImage_2" IsHitTestVisible="False" />
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<Image x:Name="ButtonImage_3" IsHitTestVisible="False" />
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<Image x:Name="ButtonImage_4" IsHitTestVisible="False" />
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</UniformGrid>
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</StackPanel>
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</Window>
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```
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```
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using System;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Media.Imaging;
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namespace Questions372108
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{
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public partial class MainWindow : Window
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{
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private readonly int[] counts = new int[5];
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private readonly Button[] buttons = new Button[5];
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private readonly Image[] images = new Image[5];
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private Button Button_0_Test;
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private Button currentButton;
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public MainWindow()
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{
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InitializeComponent();
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for (var i = 0; i < 5; i++)
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{
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buttons[i] = FindName($"Button_{i}") as Button;
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images[i] = FindName($"ButtonImage_{i}") as Image;
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}
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Button_0_Test = Button_0;
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}
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private void Button_Click(object sender, RoutedEventArgs e)
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{
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var x = Array.IndexOf(buttons, sender);
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if (counts[x] == 0)
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{
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var bi = new BitmapImage();
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bi.BeginInit();
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//bi.UriSource = new Uri("/Resources/AAA.png", UriKind.Relative);
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bi.UriSource = new Uri("https://teratail-v2.storage.googleapis.com/uploads/avatars/u13/132786/KnkDDC5A_thumbnail.jpg");
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bi.EndInit();
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images[x].Source = bi;
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counts[x]++;
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}
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else if (counts[x] == 1)
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{
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var bi = new BitmapImage();
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bi.BeginInit();
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//bi.UriSource = new Uri("/Resources/BBB.png", UriKind.Relative);
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bi.UriSource = new Uri("https://teratail-v2.storage.googleapis.com/uploads/avatars/u20/201856/m2cobCxI_thumbnail.jpg");
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bi.EndInit();
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images[x].Source = bi;
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counts[x]++;
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}
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else if (counts[x] == 2)
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{
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images[x].Source = null;
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counts[x] = 0;
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}
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// これが何の意味もない理由
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//image_[x] = new Image();
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// 例えばこうしたとして、表示されているButton_0が入れ替わるわけではない！
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Button_0_Test = new Button { Content = "Button_0がこうは変わらない！", };
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// 単に変数Button_0_Testの指す先が、新しいボタンに変わっただけ
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// Button_0は依然表示されたまま
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// 新たに作ったボタンはウィンドウに追加されていないので、
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// 表示されずにただメモリ内にあるだけになっている
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// こういった使い方なら意味はあるが
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currentButton = sender as Button;
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currentButton.Content = $"Button_{x}_{counts[x]}";
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//buttons[x].Content = $"Button_{x}_{counts[x]}";
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}
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}
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}
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```
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1
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+
`image_[x] = new Image();`こうしたところで、元の`ButtonImage_0`等には何の影響もありません。
|
|
2
|
+
|
|
3
|
+
`Image`はすでにxamlで配置しているわけですから新たに作る必要はなく、`Source`を変更するだけでいいのです^^
|
|
4
|
+
|
|
5
|
+
|
|
6
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+
```xml
|
|
7
|
+
<Window
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|
8
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+
x:Class="Questions372108.MainWindow"
|
|
9
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+
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
|
|
10
|
+
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
|
|
11
|
+
Width="800"
|
|
12
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+
Height="450">
|
|
13
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+
<StackPanel>
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|
14
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+
<UniformGrid Rows="1">
|
|
15
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+
<Button x:Name="Button_0" Click="Button_Click" Content="Button_0" />
|
|
16
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+
<Button x:Name="Button_1" Click="Button_Click" Content="Button_1" />
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17
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+
<Button x:Name="Button_2" Click="Button_Click" Content="Button_2" />
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18
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<Button x:Name="Button_3" Click="Button_Click" Content="Button_3" />
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19
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<Button x:Name="Button_4" Click="Button_Click" Content="Button_4" />
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20
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</UniformGrid>
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21
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+
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22
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<UniformGrid Rows="1">
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23
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<Image x:Name="ButtonImage_0" IsHitTestVisible="False" />
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<Image x:Name="ButtonImage_1" IsHitTestVisible="False" />
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<Image x:Name="ButtonImage_2" IsHitTestVisible="False" />
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<Image x:Name="ButtonImage_3" IsHitTestVisible="False" />
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<Image x:Name="ButtonImage_4" IsHitTestVisible="False" />
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28
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</UniformGrid>
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29
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</StackPanel>
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30
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+
</Window>
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31
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+
```
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32
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+
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33
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+
```cs
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|
34
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+
using System;
|
|
35
|
+
using System.Windows;
|
|
36
|
+
using System.Windows.Controls;
|
|
37
|
+
using System.Windows.Media.Imaging;
|
|
38
|
+
|
|
39
|
+
namespace Questions372108
|
|
40
|
+
{
|
|
41
|
+
public partial class MainWindow : Window
|
|
42
|
+
{
|
|
43
|
+
private readonly int[] counts = new int[5];
|
|
44
|
+
private readonly Button[] buttons = new Button[5];
|
|
45
|
+
private readonly Image[] images = new Image[5];
|
|
46
|
+
|
|
47
|
+
private Button Button_0_Test;
|
|
48
|
+
private Button currentButton;
|
|
49
|
+
|
|
50
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+
public MainWindow()
|
|
51
|
+
{
|
|
52
|
+
InitializeComponent();
|
|
53
|
+
|
|
54
|
+
for (var i = 0; i < 5; i++)
|
|
55
|
+
{
|
|
56
|
+
buttons[i] = FindName($"Button_{i}") as Button;
|
|
57
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+
images[i] = FindName($"ButtonImage_{i}") as Image;
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|
58
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+
}
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59
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+
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60
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Button_0_Test = Button_0;
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61
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}
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62
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+
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63
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private void Button_Click(object sender, RoutedEventArgs e)
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64
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{
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65
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var x = Array.IndexOf(buttons, sender);
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66
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+
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67
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+
if (counts[x] == 0)
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68
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{
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69
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var bi = new BitmapImage();
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70
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+
bi.BeginInit();
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71
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+
//bi.UriSource = new Uri("/Resources/AAA.png", UriKind.Relative);
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72
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+
bi.UriSource = new Uri("https://teratail-v2.storage.googleapis.com/uploads/avatars/u13/132786/KnkDDC5A_thumbnail.jpg");
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73
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bi.EndInit();
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74
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+
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75
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images[x].Source = bi;
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76
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counts[x]++;
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77
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}
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78
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else if (counts[x] == 1)
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79
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{
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80
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var bi = new BitmapImage();
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81
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bi.BeginInit();
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82
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//bi.UriSource = new Uri("/Resources/BBB.png", UriKind.Relative);
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83
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+
bi.UriSource = new Uri("https://teratail-v2.storage.googleapis.com/uploads/avatars/u20/201856/m2cobCxI_thumbnail.jpg");
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bi.EndInit();
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85
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images[x].Source = bi;
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counts[x]++;
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}
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89
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else if (counts[x] == 2)
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{
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images[x].Source = null;
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counts[x] = 0;
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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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+
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96
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+
// これが何の意味もない理由
|
|
97
|
+
//image_[x] = new Image();
|
|
98
|
+
|
|
99
|
+
// 例えばこうしたとして、表示されているButton_0が入れ替わるわけではない！
|
|
100
|
+
Button_0_Test = new Button { Content = "Button_0がこうは変わらない！", };
|
|
101
|
+
|
|
102
|
+
// 単に変数Button_0_Testの指す先が、新しいボタンに変わっただけ
|
|
103
|
+
// Button_0は依然表示されたまま
|
|
104
|
+
// 新たに作ったボタンはウィンドウに追加されていないので、
|
|
105
|
+
// 表示されずにただメモリ内にあるだけになっている
|
|
106
|
+
|
|
107
|
+
|
|
108
|
+
// こういった使い方なら意味はあるが
|
|
109
|
+
currentButton = sender as Button;
|
|
110
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+
currentButton.Content = $"Button_{x}_{counts[x]}";
|
|
111
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+
//buttons[x].Content = $"Button_{x}_{counts[x]}";
|
|
112
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+
}
|
|
113
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+
}
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|
114
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+
}
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|
115
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+
```
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116
116
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