回答編集履歴
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見直しキャンペーン中
answer
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C#コード側から`DataInfo`のプロパティを変更する場合は、`DataInfo`に`INotifyPropertyChanged`を実装してください。
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WPFにおいて`INotifyPropertyChanged`は最重要インターフェースです。
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[INotifyPropertyChanged インターフェイス (System.ComponentModel) | Microsoft Docs](https://docs.microsoft.com/ja-jp/dotnet/api/system.componentmodel.inotifypropertychanged)
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`vmDataInfo`の`get`・`set`でやっていることを、`SelectIndex`でもやるということです（逆に`vmDataInfo`でやる意味はないです）
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```
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using Livet;
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using System.Collections.ObjectModel;
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namespace Questions355938.ViewModels
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{
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public class DataInfo : ViewModel
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{
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private string _SelectIndex;
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public string SelectIndex
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{
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get => _SelectIndex;
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set
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{
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//if (_SelectIndex != value)
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//{
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// _SelectIndex = value;
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// RaisePropertyChanged();
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//}
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// ↑の短縮形
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RaisePropertyChangedIfSet(ref _SelectIndex, value);
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}
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}
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public string ParamName { get; set; }
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public int Param1 { get; set; }
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public int Param2 { get; set; }
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}
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class MainWindowVM : ViewModel
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{
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public ObservableCollection<DataInfo> vmDataInfo { get; }
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public MainWindowVM()
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{
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vmDataInfo = new ObservableCollection<DataInfo>
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{
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new DataInfo { ParamName = "Parameter 1", Param1 = 100, Param2 = 0 },
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new DataInfo { ParamName = "Parameter 2", Param1 = 200, Param2 = 99 },
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new DataInfo { ParamName = "Parameter 3", Param1 = 300, Param2 = 199 },
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new DataInfo { ParamName = "Parameter 4", Param1 = 400, Param2 = 299 },
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new DataInfo { ParamName = "Parameter 5", Param1 = 500, Param2 = 399 },
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};
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}
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public void CurrentCellChanged(object sender)
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{
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if (sender is DataInfo info)
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{
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var selectIndex = 0;
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foreach (var data in vmDataInfo)
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{
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if (info.ParamName == data.ParamName)
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{
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vmDataInfo[selectIndex].SelectIndex = "●";
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}
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else
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{
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vmDataInfo[selectIndex].SelectIndex = "";
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}
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selectIndex++;
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}
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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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+
C#コード側から`DataInfo`のプロパティを変更する場合は、`DataInfo`に`INotifyPropertyChanged`を実装してください。
|
|
2
|
+
|
|
3
|
+
WPFにおいて`INotifyPropertyChanged`は最重要インターフェースです。
|
|
4
|
+
[INotifyPropertyChanged インターフェイス (System.ComponentModel) | Microsoft Docs](https://docs.microsoft.com/ja-jp/dotnet/api/system.componentmodel.inotifypropertychanged)
|
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5
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+
|
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6
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+
`vmDataInfo`の`get`・`set`でやっていることを、`SelectIndex`でもやるということです（逆に`vmDataInfo`でやる意味はないです）
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7
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+
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8
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+
```cs
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9
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+
using Livet;
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|
10
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+
using System.Collections.ObjectModel;
|
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11
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+
|
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12
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+
namespace Questions355938.ViewModels
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13
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+
{
|
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14
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+
public class DataInfo : ViewModel
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15
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+
{
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16
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+
private string _SelectIndex;
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17
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+
public string SelectIndex
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18
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+
{
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19
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get => _SelectIndex;
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20
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set
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{
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22
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//if (_SelectIndex != value)
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23
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//{
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24
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// _SelectIndex = value;
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25
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// RaisePropertyChanged();
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26
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//}
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27
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// ↑の短縮形
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28
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RaisePropertyChangedIfSet(ref _SelectIndex, value);
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29
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}
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30
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}
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31
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+
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32
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public string ParamName { get; set; }
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33
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public int Param1 { get; set; }
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34
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public int Param2 { get; set; }
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35
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+
}
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36
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+
|
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37
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+
class MainWindowVM : ViewModel
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38
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+
{
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39
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+
public ObservableCollection<DataInfo> vmDataInfo { get; }
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40
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+
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41
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+
public MainWindowVM()
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42
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+
{
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43
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vmDataInfo = new ObservableCollection<DataInfo>
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44
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{
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45
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new DataInfo { ParamName = "Parameter 1", Param1 = 100, Param2 = 0 },
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46
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new DataInfo { ParamName = "Parameter 2", Param1 = 200, Param2 = 99 },
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47
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new DataInfo { ParamName = "Parameter 3", Param1 = 300, Param2 = 199 },
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48
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+
new DataInfo { ParamName = "Parameter 4", Param1 = 400, Param2 = 299 },
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49
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+
new DataInfo { ParamName = "Parameter 5", Param1 = 500, Param2 = 399 },
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50
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};
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51
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}
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52
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+
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53
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public void CurrentCellChanged(object sender)
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54
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+
{
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55
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+
if (sender is DataInfo info)
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56
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+
{
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57
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+
var selectIndex = 0;
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58
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+
foreach (var data in vmDataInfo)
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59
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+
{
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60
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+
if (info.ParamName == data.ParamName)
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61
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+
{
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62
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+
vmDataInfo[selectIndex].SelectIndex = "●";
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63
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+
}
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|
64
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+
else
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65
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+
{
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66
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vmDataInfo[selectIndex].SelectIndex = "";
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67
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+
}
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68
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+
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69
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selectIndex++;
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70
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}
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71
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}
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72
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}
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73
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}
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74
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}
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75
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```
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