質問編集履歴
5
コンパイルが通らない問題を解決しました
test
CHANGED
File without changes
|
test
CHANGED
@@ -30,230 +30,414 @@
|
|
30
30
|
|
31
31
|
```C#
|
32
32
|
|
33
|
+
using System;
|
34
|
+
|
33
|
-
|
35
|
+
using System.Collections.Generic;
|
36
|
+
|
37
|
+
using System.Linq;
|
38
|
+
|
39
|
+
using System.Text;
|
40
|
+
|
41
|
+
using System.Threading.Tasks;
|
42
|
+
|
43
|
+
using Prism.Mvvm;
|
44
|
+
|
45
|
+
using Reactive.Bindings;
|
46
|
+
|
47
|
+
|
48
|
+
|
49
|
+
namespace ForTeratail.Models
|
34
50
|
|
35
51
|
{
|
36
52
|
|
37
|
-
p
|
53
|
+
public sealed class PersonList : BindableBase
|
38
|
-
|
39
|
-
|
40
|
-
|
41
|
-
private PersonList()
|
42
54
|
|
43
55
|
{
|
44
56
|
|
57
|
+
static readonly PersonList m_instance = new PersonList();
|
58
|
+
|
59
|
+
|
60
|
+
|
61
|
+
public static PersonList Instance
|
62
|
+
|
63
|
+
{
|
64
|
+
|
65
|
+
get { return m_instance; }
|
66
|
+
|
67
|
+
}
|
68
|
+
|
69
|
+
|
70
|
+
|
71
|
+
int count;
|
72
|
+
|
73
|
+
|
74
|
+
|
75
|
+
private PersonList()
|
76
|
+
|
77
|
+
{
|
78
|
+
|
79
|
+
count = 0;
|
80
|
+
|
45
|
-
PersonCollection = new ReactiveCollection<Person>();
|
81
|
+
PersonCollection = new ReactiveCollection<Person>();
|
46
|
-
|
82
|
+
|
47
|
-
Add();
|
83
|
+
Add();
|
84
|
+
|
85
|
+
}
|
86
|
+
|
87
|
+
|
88
|
+
|
89
|
+
ReactiveCollection<Person> m_collection;
|
90
|
+
|
91
|
+
public ReactiveCollection<Person> PersonCollection
|
92
|
+
|
93
|
+
{
|
94
|
+
|
95
|
+
get { return m_collection; }
|
96
|
+
|
97
|
+
set { SetProperty(ref m_collection, value); }
|
98
|
+
|
99
|
+
}
|
100
|
+
|
101
|
+
|
102
|
+
|
103
|
+
Person m_current;
|
104
|
+
|
105
|
+
public Person CurrentPerson
|
106
|
+
|
107
|
+
{
|
108
|
+
|
109
|
+
get { return m_current; }
|
110
|
+
|
111
|
+
set { SetProperty(ref m_current, value); }
|
112
|
+
|
113
|
+
}
|
114
|
+
|
115
|
+
|
116
|
+
|
117
|
+
public void Add()
|
118
|
+
|
119
|
+
{
|
120
|
+
|
121
|
+
Person p = new Person(count);
|
122
|
+
|
123
|
+
PersonCollection.Add(p);
|
124
|
+
|
125
|
+
CurrentPerson = PersonCollection[PersonCollection.Count - 1];
|
126
|
+
|
127
|
+
count++;
|
128
|
+
|
129
|
+
}
|
48
130
|
|
49
131
|
}
|
50
132
|
|
133
|
+
}
|
134
|
+
|
135
|
+
```
|
136
|
+
|
137
|
+
|
138
|
+
|
139
|
+
#### Person
|
140
|
+
|
141
|
+
|
142
|
+
|
143
|
+
```C#
|
144
|
+
|
51
|
-
|
145
|
+
using System;
|
52
|
-
|
53
|
-
|
54
|
-
|
146
|
+
|
55
|
-
|
147
|
+
using System.Collections.Generic;
|
148
|
+
|
56
|
-
|
149
|
+
using System.Linq;
|
150
|
+
|
151
|
+
using System.Text;
|
152
|
+
|
153
|
+
using System.Threading.Tasks;
|
154
|
+
|
155
|
+
using Prism.Mvvm;
|
156
|
+
|
157
|
+
using Reactive.Bindings;
|
158
|
+
|
159
|
+
|
160
|
+
|
161
|
+
namespace ForTeratail.Models
|
162
|
+
|
163
|
+
{
|
164
|
+
|
57
|
-
public
|
165
|
+
public class Person : BindableBase
|
58
166
|
|
59
167
|
{
|
60
168
|
|
169
|
+
public int Id { get; set; }
|
170
|
+
|
171
|
+
|
172
|
+
|
173
|
+
string m_name;
|
174
|
+
|
175
|
+
public string Name
|
176
|
+
|
177
|
+
{
|
178
|
+
|
61
|
-
get { return m_
|
179
|
+
get { return m_name; }
|
62
|
-
|
180
|
+
|
63
|
-
set { SetProperty(ref m_
|
181
|
+
set { SetProperty(ref m_name, value); }
|
182
|
+
|
183
|
+
}
|
184
|
+
|
185
|
+
|
186
|
+
|
187
|
+
int m_age;
|
188
|
+
|
189
|
+
public int Age
|
190
|
+
|
191
|
+
{
|
192
|
+
|
193
|
+
get { return m_age; }
|
194
|
+
|
195
|
+
set { SetProperty(ref m_age, value); }
|
196
|
+
|
197
|
+
}
|
198
|
+
|
199
|
+
|
200
|
+
|
201
|
+
public Person(int id)
|
202
|
+
|
203
|
+
{
|
204
|
+
|
205
|
+
Id = id;
|
206
|
+
|
207
|
+
}
|
64
208
|
|
65
209
|
}
|
66
210
|
|
67
|
-
|
211
|
+
}
|
212
|
+
|
68
|
-
|
213
|
+
```
|
214
|
+
|
215
|
+
|
216
|
+
|
217
|
+
|
218
|
+
|
219
|
+
#### MyViewModel(ComboBoxがあるViewのVM)
|
220
|
+
|
221
|
+
|
222
|
+
|
223
|
+
```C#
|
224
|
+
|
225
|
+
using System.Reactive.Linq;
|
226
|
+
|
69
|
-
|
227
|
+
using Prism.Mvvm;
|
228
|
+
|
70
|
-
|
229
|
+
using Reactive.Bindings;
|
230
|
+
|
231
|
+
using Reactive.Bindings.Extensions;
|
232
|
+
|
71
|
-
|
233
|
+
using ForTeratail.Models;
|
234
|
+
|
235
|
+
|
236
|
+
|
237
|
+
namespace ForTeratail.ViewModels
|
238
|
+
|
239
|
+
{
|
240
|
+
|
241
|
+
public class MainWindowViewModel : BindableBase
|
72
242
|
|
73
243
|
{
|
74
244
|
|
245
|
+
private string _title = "Prism Application";
|
246
|
+
|
247
|
+
public string Title
|
248
|
+
|
249
|
+
{
|
250
|
+
|
75
|
-
get { return
|
251
|
+
get { return _title; }
|
76
|
-
|
252
|
+
|
77
|
-
set { SetProperty(ref
|
253
|
+
set { SetProperty(ref _title, value); }
|
254
|
+
|
255
|
+
}
|
256
|
+
|
257
|
+
|
258
|
+
|
259
|
+
public ReactiveCollection<Person> Collection { get; }
|
260
|
+
|
261
|
+
public ReactiveProperty<Person> CurrentPerson { get; }
|
262
|
+
|
263
|
+
public ReactiveProperty<string> HereName { get; }
|
264
|
+
|
265
|
+
public ReactiveProperty<int> HereAge { get; }
|
266
|
+
|
267
|
+
public ReactiveProperty<string> Introduction { get; }
|
268
|
+
|
269
|
+
|
270
|
+
|
271
|
+
public ReactiveCommand<string> UIInteractiveNameCommand { get; }
|
272
|
+
|
273
|
+
public ReactiveCommand<int> UIInteractiveAgeCommand { get; }
|
274
|
+
|
275
|
+
public ReactiveCommand AddCommand { get; }
|
276
|
+
|
277
|
+
|
278
|
+
|
279
|
+
public MainWindowViewModel()
|
280
|
+
|
281
|
+
{
|
282
|
+
|
283
|
+
Collection = PersonList.Instance.PersonCollection;
|
284
|
+
|
285
|
+
CurrentPerson = PersonList.Instance.ToReactivePropertyAsSynchronized(x => x.CurrentPerson);
|
286
|
+
|
287
|
+
|
288
|
+
|
289
|
+
HereName = CurrentPerson.Select(x => x.Name).ToReactiveProperty();
|
290
|
+
|
291
|
+
HereAge = CurrentPerson.Select(x => x.Age).ToReactiveProperty();
|
292
|
+
|
293
|
+
|
294
|
+
|
295
|
+
Introduction = HereName.Where(x => x != null).Select(x => "I am " + x).ToReactiveProperty();
|
296
|
+
|
297
|
+
|
298
|
+
|
299
|
+
UIInteractiveNameCommand = new ReactiveCommand<string>().WithSubscribe(x =>
|
300
|
+
|
301
|
+
{
|
302
|
+
|
303
|
+
CurrentPerson.Value.Name = x;
|
304
|
+
|
305
|
+
});
|
306
|
+
|
307
|
+
|
308
|
+
|
309
|
+
UIInteractiveAgeCommand = new ReactiveCommand<int>().WithSubscribe(x =>
|
310
|
+
|
311
|
+
{
|
312
|
+
|
313
|
+
CurrentPerson.Value.Age = x;
|
314
|
+
|
315
|
+
});
|
316
|
+
|
317
|
+
|
318
|
+
|
319
|
+
AddCommand = new ReactiveCommand();
|
320
|
+
|
321
|
+
AddCommand.Subscribe(PersonList.Instance.Add);
|
322
|
+
|
323
|
+
}
|
78
324
|
|
79
325
|
}
|
80
326
|
|
81
|
-
|
82
|
-
|
83
|
-
public void Add()
|
84
|
-
|
85
|
-
{
|
86
|
-
|
87
|
-
Person p = new Person();
|
88
|
-
|
89
|
-
PersonCollection.Add(p);
|
90
|
-
|
91
|
-
CurrentPerson = PersonCollection[PersonCollection.Count - 1];
|
92
|
-
|
93
|
-
}
|
94
|
-
|
95
327
|
}
|
96
328
|
|
97
329
|
```
|
98
330
|
|
99
331
|
|
100
332
|
|
101
|
-
####
|
333
|
+
#### MyView (ComboBoxがあるView)
|
102
334
|
|
103
335
|
|
104
336
|
|
105
337
|
```C#
|
106
338
|
|
107
|
-
|
339
|
+
<Window x:Class="ForTeratail.Views.MainWindow"
|
108
|
-
|
109
|
-
|
340
|
+
|
110
|
-
|
111
|
-
strin
|
341
|
+
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
|
112
|
-
|
342
|
+
|
113
|
-
p
|
343
|
+
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
|
114
|
-
|
115
|
-
|
344
|
+
|
116
|
-
|
117
|
-
|
345
|
+
xmlns:prism="http://prismlibrary.com/"
|
118
|
-
|
346
|
+
|
119
|
-
se
|
347
|
+
prism:ViewModelLocator.AutoWireViewModel="True"
|
120
|
-
|
348
|
+
|
121
|
-
}
|
349
|
+
Title="{Binding Title}" Height="350" Width="525">
|
122
|
-
|
123
|
-
|
124
|
-
|
350
|
+
|
125
|
-
i
|
351
|
+
<Grid>
|
352
|
+
|
126
|
-
|
353
|
+
<Grid.RowDefinitions>
|
354
|
+
|
355
|
+
<RowDefinition/>
|
356
|
+
|
357
|
+
<RowDefinition/>
|
358
|
+
|
359
|
+
<RowDefinition/>
|
360
|
+
|
361
|
+
<RowDefinition/>
|
362
|
+
|
363
|
+
</Grid.RowDefinitions>
|
364
|
+
|
365
|
+
<Grid.ColumnDefinitions>
|
366
|
+
|
367
|
+
<ColumnDefinition/>
|
368
|
+
|
369
|
+
<ColumnDefinition/>
|
370
|
+
|
371
|
+
</Grid.ColumnDefinitions>
|
372
|
+
|
373
|
+
<ComboBox Grid.Column="0" Margin="10 20"
|
374
|
+
|
375
|
+
ItemsSource="{Binding Collection}"
|
376
|
+
|
377
|
+
SelectedValue="{Binding CurrentPerson.Value}"
|
378
|
+
|
379
|
+
DisplayMemberPath="Id" />
|
380
|
+
|
381
|
+
<Button Grid.Column="1" Content="新規追加" Command="{Binding AddCommand}" Margin="20" />
|
382
|
+
|
383
|
+
|
384
|
+
|
385
|
+
<TextBox Grid.Row="1" Grid.Column="0" Margin="10" Height="30" FontSize="18"
|
386
|
+
|
387
|
+
TextAlignment="Center" VerticalContentAlignment="Center"
|
388
|
+
|
389
|
+
x:Name="NameBlock"/>
|
390
|
+
|
391
|
+
<Button Grid.Row="1" Grid.Column="1" Content="登録" Margin="20"
|
392
|
+
|
393
|
+
Command="{Binding UIInteractiveNameCommand}"
|
394
|
+
|
395
|
+
CommandParameter="{Binding Text, ElementName=NameBlock}" />
|
396
|
+
|
397
|
+
|
398
|
+
|
399
|
+
<TextBox Grid.Row="2" Grid.Column="0" Margin="10" Height="30" FontSize="18"
|
400
|
+
|
401
|
+
TextAlignment="Center" VerticalContentAlignment="Center"
|
402
|
+
|
403
|
+
x:Name="AgeBlock"/>
|
404
|
+
|
405
|
+
<Button Grid.Row="2" Grid.Column="1" Content="登録" Margin="20"
|
406
|
+
|
407
|
+
Command="{Binding UIInteractiveAgeCommand}"
|
408
|
+
|
409
|
+
CommandParameter="{Binding Text, ElementName=AgeBlock}" />
|
410
|
+
|
411
|
+
|
412
|
+
|
413
|
+
<Label Grid.Row="3" Grid.ColumnSpan="2" Content="{Binding Introduction.Value}" />
|
414
|
+
|
127
|
-
|
415
|
+
</Grid>
|
128
|
-
|
129
|
-
|
416
|
+
|
130
|
-
|
131
|
-
|
417
|
+
</Window>
|
132
|
-
|
133
|
-
set { SetProperty(ref m_age, value); }
|
134
|
-
|
135
|
-
}
|
136
|
-
|
137
|
-
}
|
138
418
|
|
139
419
|
```
|
140
420
|
|
141
421
|
|
142
422
|
|
143
|
-
|
144
|
-
|
145
|
-
#### MyViewModel(ComboBoxがあるViewのVM)
|
146
|
-
|
147
|
-
|
148
|
-
|
149
|
-
|
423
|
+
### 問題
|
150
|
-
|
151
|
-
|
424
|
+
|
152
|
-
|
153
|
-
{
|
154
|
-
|
155
|
-
public ReactiveCollection<Person> Collection { get; }
|
156
|
-
|
157
|
-
public ReactiveProperty<Person> CurrentPerson { get; }
|
158
|
-
|
159
|
-
public ReactiveProperty<string> HereName { get; }
|
160
|
-
|
161
|
-
public ReactiveProperty<int> HereAge { get; }
|
162
|
-
|
163
|
-
public ReactiveProperty<string> Introduction { get; }
|
164
|
-
|
165
|
-
|
166
|
-
|
167
|
-
public ReactiveCommand<string> UIInteractiveNameCommand { get; }
|
168
|
-
|
169
|
-
public ReactiveCommand<int> UIInteractiveAgeCommand { get; }
|
170
|
-
|
171
|
-
public ReactiveCommand AddCommand { get; }
|
172
|
-
|
173
|
-
|
174
|
-
|
175
|
-
public MyViewModel()
|
176
|
-
|
177
|
-
{
|
178
|
-
|
179
|
-
// ComboBoxで表示されるリスト
|
180
|
-
|
181
|
-
|
425
|
+
新規追加ボタンを押すと`PersonList`クラスの`PersonCollection`に空の`Person`オブジェクトが追加されます.
|
182
|
-
|
426
|
+
|
183
|
-
|
427
|
+
それがComboBoxに紐付いています.
|
428
|
+
|
184
|
-
|
429
|
+
また,登録ボタンを押すとテキストボックスにあるテキストがCommandの引数として渡され,現在選択されている`Person`オブジェクトのプロパティとしてセットされます.
|
430
|
+
|
185
|
-
|
431
|
+
ここはあくまで発生している問題を再現する簡易的な例なので,TextBoxの内容を`ReactiveProperty`とBindingするということは考えないでください.
|
186
|
-
|
187
|
-
|
188
|
-
|
432
|
+
|
189
|
-
|
433
|
+
あくまで,コマンド経由で現在選択されているオブジェクトのプロパティを変更したときに,それを監視している`ReactiveProperty`の値が変更されないという問題です.
|
190
|
-
|
191
|
-
HereAge = CurrentPerson.Select(x => x.Age).ToReactiveProperty(); // => これがずっとnullになる
|
192
|
-
|
193
|
-
|
194
|
-
|
195
|
-
// このプロパティはCurrentPersonの変更と,CurrentPerson.Value.Nameの変更の両方を検知したい
|
196
|
-
|
197
|
-
Introduction = HereName.Where(x => x != null).Select(x => "I am " + x).ToReactiveProperty();
|
198
|
-
|
199
|
-
|
200
|
-
|
201
|
-
UIInteractiveNameCommand = new ReactiveCommand<string>().WithSubscribe(x =>
|
202
|
-
|
203
|
-
{
|
204
|
-
|
205
|
-
CurrentPerson.Name = x;
|
206
|
-
|
207
|
-
});
|
208
|
-
|
209
|
-
|
210
|
-
|
211
|
-
UIInteractiveAgeCommand = new ReactiveCommand<int>().WithSubscribe(x =>
|
212
|
-
|
213
|
-
{
|
214
|
-
|
215
|
-
CurrentPerson.Age = x;
|
216
|
-
|
217
|
-
});
|
218
|
-
|
219
|
-
|
220
|
-
|
221
|
-
// AddされるとCurrentPersonが変化する
|
222
|
-
|
223
|
-
// そのときにHereNameの値が更新されない
|
224
|
-
|
225
|
-
AddCommand = new ReactiveCommand().WithSubscribe(_ => PersonList.Instance.Add());
|
226
|
-
|
227
|
-
}
|
228
|
-
|
229
|
-
}
|
230
|
-
|
231
|
-
```
|
232
|
-
|
233
|
-
|
234
|
-
|
235
|
-
#### MyView (ComboBoxがあるView)
|
236
|
-
|
237
|
-
|
238
|
-
|
239
|
-
```C#
|
240
|
-
|
241
|
-
// 省略
|
242
|
-
|
243
|
-
<ComboBox ItemsSource="{Binding Collection}" SelectedValue="{Binding CurrentPerson.Value}" DisplayMemberPath="Name"
|
244
|
-
|
245
|
-
Grid.Row="2" Grid.Column="0" Margin="0 0"/>
|
246
|
-
|
247
|
-
<Button Command="{Binding AddCommand}" />
|
248
|
-
|
249
|
-
// 省略
|
250
|
-
|
251
|
-
```
|
252
434
|
|
253
435
|
|
254
436
|
|
255
437
|
上記クラスの`CurrentPerson`の`Name`プロパティや`Age`プロパティは適切に変更されますが,`HereName`や`HereAge`が`null`のままで書き換わってくれません.
|
256
438
|
|
439
|
+
しかし,ComboBoxで選択しているオブジェクトを変更し(例えば`Id=0`のオブジェクトから`Id=1`のオブジェクトへ),その後同じオブジェクト(`Id=0`)に戻ってくると,プロパティの値がちゃんと`Here〇〇`に設定されています.
|
440
|
+
|
257
441
|
`CurrentPerson`が保持している`Person`オブジェクト自体の変更と,その`Person`オブジェクト内のプロパティ両方の変更を検知するためにはどのように修正すればいいでしょうか?
|
258
442
|
|
259
443
|
|
4
ソースコードの修正
test
CHANGED
File without changes
|
test
CHANGED
@@ -160,6 +160,8 @@
|
|
160
160
|
|
161
161
|
public ReactiveProperty<int> HereAge { get; }
|
162
162
|
|
163
|
+
public ReactiveProperty<string> Introduction { get; }
|
164
|
+
|
163
165
|
|
164
166
|
|
165
167
|
public ReactiveCommand<string> UIInteractiveNameCommand { get; }
|
@@ -190,6 +192,12 @@
|
|
190
192
|
|
191
193
|
|
192
194
|
|
195
|
+
// このプロパティはCurrentPersonの変更と,CurrentPerson.Value.Nameの変更の両方を検知したい
|
196
|
+
|
197
|
+
Introduction = HereName.Where(x => x != null).Select(x => "I am " + x).ToReactiveProperty();
|
198
|
+
|
199
|
+
|
200
|
+
|
193
201
|
UIInteractiveNameCommand = new ReactiveCommand<string>().WithSubscribe(x =>
|
194
202
|
|
195
203
|
{
|
3
ソースコード及びやりたいことの追記
test
CHANGED
File without changes
|
test
CHANGED
@@ -8,11 +8,13 @@
|
|
8
8
|
|
9
9
|
|
10
10
|
|
11
|
-
#
|
11
|
+
# やりたいこと
|
12
|
-
|
13
|
-
|
14
|
-
|
12
|
+
|
13
|
+
|
14
|
+
|
15
|
-
ある自作クラスの`ReactiveProperty`と,そのクラスのプロパティの`ReactiveProperty`を作っています.
|
15
|
+
ある自作クラスの`ReactiveProperty`Aと,そのクラスのプロパティの`ReactiveProperty`Bを作っています.
|
16
|
+
|
17
|
+
Bにおいて,`A.Value`と,その`A.Value.Property`の両方を監視したいです.
|
16
18
|
|
17
19
|
自作クラスの`ReactiveProperty`を書換えたときに,連動してプロパティの`ReactiveProperty`も書き換わってほしいのですが,ずっとnullのままです.
|
18
20
|
|
@@ -118,6 +120,20 @@
|
|
118
120
|
|
119
121
|
}
|
120
122
|
|
123
|
+
|
124
|
+
|
125
|
+
int m_age;
|
126
|
+
|
127
|
+
public int Age
|
128
|
+
|
129
|
+
{
|
130
|
+
|
131
|
+
get { return m_age; }
|
132
|
+
|
133
|
+
set { SetProperty(ref m_age, value); }
|
134
|
+
|
135
|
+
}
|
136
|
+
|
121
137
|
}
|
122
138
|
|
123
139
|
```
|
@@ -142,7 +158,15 @@
|
|
142
158
|
|
143
159
|
public ReactiveProperty<string> HereName { get; }
|
144
160
|
|
161
|
+
public ReactiveProperty<int> HereAge { get; }
|
162
|
+
|
163
|
+
|
164
|
+
|
145
|
-
public ReactiveCommand<string> UIInteractiveCommand { get; }
|
165
|
+
public ReactiveCommand<string> UIInteractiveNameCommand { get; }
|
166
|
+
|
167
|
+
public ReactiveCommand<int> UIInteractiveAgeCommand { get; }
|
168
|
+
|
169
|
+
public ReactiveCommand AddCommand { get; }
|
146
170
|
|
147
171
|
|
148
172
|
|
@@ -150,21 +174,47 @@
|
|
150
174
|
|
151
175
|
{
|
152
176
|
|
177
|
+
// ComboBoxで表示されるリスト
|
178
|
+
|
153
179
|
Collection = PersonList.Instance.PersonCollection;
|
154
180
|
|
181
|
+
// ComboBoxで現在選択されているリスト
|
182
|
+
|
155
183
|
CurrentPerson = PersonList.Instance.ToReactivePropertyAsSynchronized(x => x.CurrentPerson);
|
156
184
|
|
185
|
+
|
186
|
+
|
157
187
|
HereName = CurrentPerson.Select(x => x.Name).ToReactiveProperty(); // => これがずっとnullになる
|
158
188
|
|
159
|
-
|
189
|
+
HereAge = CurrentPerson.Select(x => x.Age).ToReactiveProperty(); // => これがずっとnullになる
|
160
|
-
|
190
|
+
|
191
|
+
|
192
|
+
|
161
|
-
UIInteractiveCommand = new ReactiveCommand<string>().WithSubscribe(x =>
|
193
|
+
UIInteractiveNameCommand = new ReactiveCommand<string>().WithSubscribe(x =>
|
162
194
|
|
163
195
|
{
|
164
196
|
|
165
|
-
CurrentPerson.
|
197
|
+
CurrentPerson.Name = x;
|
166
|
-
|
198
|
+
|
167
|
-
})
|
199
|
+
});
|
200
|
+
|
201
|
+
|
202
|
+
|
203
|
+
UIInteractiveAgeCommand = new ReactiveCommand<int>().WithSubscribe(x =>
|
204
|
+
|
205
|
+
{
|
206
|
+
|
207
|
+
CurrentPerson.Age = x;
|
208
|
+
|
209
|
+
});
|
210
|
+
|
211
|
+
|
212
|
+
|
213
|
+
// AddされるとCurrentPersonが変化する
|
214
|
+
|
215
|
+
// そのときにHereNameの値が更新されない
|
216
|
+
|
217
|
+
AddCommand = new ReactiveCommand().WithSubscribe(_ => PersonList.Instance.Add());
|
168
218
|
|
169
219
|
}
|
170
220
|
|
@@ -174,9 +224,29 @@
|
|
174
224
|
|
175
225
|
|
176
226
|
|
227
|
+
#### MyView (ComboBoxがあるView)
|
228
|
+
|
229
|
+
|
230
|
+
|
231
|
+
```C#
|
232
|
+
|
233
|
+
// 省略
|
234
|
+
|
235
|
+
<ComboBox ItemsSource="{Binding Collection}" SelectedValue="{Binding CurrentPerson.Value}" DisplayMemberPath="Name"
|
236
|
+
|
237
|
+
Grid.Row="2" Grid.Column="0" Margin="0 0"/>
|
238
|
+
|
239
|
+
<Button Command="{Binding AddCommand}" />
|
240
|
+
|
241
|
+
// 省略
|
242
|
+
|
243
|
+
```
|
244
|
+
|
245
|
+
|
246
|
+
|
177
|
-
上記クラスの`CurrentPerson`の`Name`プロパティは適切に変更されますが,`HereName`が`null`のままで書き換わってくれません.
|
247
|
+
上記クラスの`CurrentPerson`の`Name`プロパティや`Age`プロパティは適切に変更されますが,`HereName`や`HereAge`が`null`のままで書き換わってくれません.
|
178
|
-
|
248
|
+
|
179
|
-
どのように修正すればいいでしょうか?
|
249
|
+
`CurrentPerson`が保持している`Person`オブジェクト自体の変更と,その`Person`オブジェクト内のプロパティ両方の変更を検知するためにはどのように修正すればいいでしょうか?
|
180
250
|
|
181
251
|
|
182
252
|
|
2
ソースコードの修正を行いました.
test
CHANGED
File without changes
|
test
CHANGED
@@ -162,7 +162,7 @@
|
|
162
162
|
|
163
163
|
{
|
164
164
|
|
165
|
-
CurrentPerson.Name = x;
|
165
|
+
CurrentPerson.Value.Name = x;
|
166
166
|
|
167
167
|
})
|
168
168
|
|
1
ソースコードの修正を行いました.
test
CHANGED
File without changes
|
test
CHANGED
@@ -28,9 +28,27 @@
|
|
28
28
|
|
29
29
|
```C#
|
30
30
|
|
31
|
-
sealed class PersonList : BindableBase
|
31
|
+
public sealed class PersonList : BindableBase
|
32
32
|
|
33
33
|
{
|
34
|
+
|
35
|
+
private static readonly PersonList m_instance = new PersonList();
|
36
|
+
|
37
|
+
|
38
|
+
|
39
|
+
private PersonList()
|
40
|
+
|
41
|
+
{
|
42
|
+
|
43
|
+
PersonCollection = new ReactiveCollection<Person>();
|
44
|
+
|
45
|
+
Add();
|
46
|
+
|
47
|
+
}
|
48
|
+
|
49
|
+
public static PersonList Instance { get { return m_instance; } }
|
50
|
+
|
51
|
+
|
34
52
|
|
35
53
|
ReactiveCollection<Person> m_collection;
|
36
54
|
|
@@ -58,6 +76,20 @@
|
|
58
76
|
|
59
77
|
}
|
60
78
|
|
79
|
+
|
80
|
+
|
81
|
+
public void Add()
|
82
|
+
|
83
|
+
{
|
84
|
+
|
85
|
+
Person p = new Person();
|
86
|
+
|
87
|
+
PersonCollection.Add(p);
|
88
|
+
|
89
|
+
CurrentPerson = PersonCollection[PersonCollection.Count - 1];
|
90
|
+
|
91
|
+
}
|
92
|
+
|
61
93
|
}
|
62
94
|
|
63
95
|
```
|
@@ -70,7 +102,7 @@
|
|
70
102
|
|
71
103
|
```C#
|
72
104
|
|
73
|
-
class Person : BindableBase
|
105
|
+
public class Person : BindableBase
|
74
106
|
|
75
107
|
{
|
76
108
|
|
@@ -142,7 +174,7 @@
|
|
142
174
|
|
143
175
|
|
144
176
|
|
145
|
-
上記クラスの`CurrentPerson`の
|
177
|
+
上記クラスの`CurrentPerson`の`Name`プロパティは適切に変更されますが,`HereName`が`null`のままで書き換わってくれません.
|
146
178
|
|
147
179
|
どのように修正すればいいでしょうか?
|
148
180
|
|