Question

我需要在DataGrid中显示从外部源接收到的一组位状态。为此，我使用像这样的ObservableCollection

for epoch in range(EPOCHS):
    for data, target in data_a:
        output = model(data)
        loss = criterion(output, target)
        optimizer.zero_grad()
        loss.backward()
        optimizer.step()

    for data, target in data_b:
        output = model(data)
        loss = criterion(output, target)
        optimizer.zero_grad()
        loss.backward()
        optimizer.step()

    for data, target in data_c:
        output = model(data)
        loss = criterion(output, target)
        optimizer.zero_grad()
        loss.backward()
        optimizer.step()

public class UpdateIO : INotifyPropertyChanged

我的IObitDetails类是

public static ObservableCollection<IObitDetails> PlcCommonOutputs = new ObservableCollection<IObitDetails>();

接下来，我创建了收藏集</ p>

    public class IObitDetails : INotifyPropertyChanged
    {
        bool _bitValue;
        public string BitGroup { get; set; }
        public string BitText { get; set; }
        public short CIOaddress { get; set; }
        public short BitPosition { get; set; }
        public bool BitValue
        {
            get { return _bitValue; }
            set { SetField(ref _bitValue, value); }
        }
        public event PropertyChangedEventHandler PropertyChanged;
        protected void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
        protected bool SetField<T>(ref T field, T value,
        [CallerMemberName] string propertyName = null)
        {
            if (EqualityComparer<T>.Default.Equals(field, value))
                return false;
            field = value;
            OnPropertyChanged(propertyName);
            return true;
        }
        public IObitDetails(string bg, bool bv, string bt, short adr, short pos)
        {
            BitGroup = bg;
            BitValue = bv;
            BitText = bt;
            CIOaddress = adr;
            BitPosition = pos;
        }
    }

这里的BitPositions声明为：

PlcCommonOutputs.Add(new IObitDetails("CO", oCommonOpLampRed,"Op. Red", 0x0001, obitCommonOpLampRed));
PlcCommonOutputs.Add(new IObitDetails("CO", oCommonOpLampGreen,"Op. Green", 0x0001, obitCommonOpLampGreen));
PlcCommonOutputs.Add(new IObitDetails("CO", oCommonMuteA,"MuteA", 0x0001, obitCommonMuteA));
PlcCommonOutputs.Add(new IObitDetails("CO", oCommonMuteB,"MuteB", 0x0001, obitCommonMuteB));
...

每个位都是一个属性，当我（在轮询线程中）读取端口并存储在oCommonOutputsPost中时会对其进行修改：

private const short obitCommonOpLampRed = 0;
private const short obitCommonOpLampGreen = 1;
private const short obitCommonMuteA = 2;
private const short obitCommonMuteB = 3;
...

每当我读取一个新的端口值时，这些位就会被设置/重置（我看到正确修改了位属性）。但是ObservableCollection（PlcCommonOutputs）不变。如果我在调试器中手动更改集合中相应的BitValue，则它们会在UI中显示（因此，我不包含任何xaml）。有没有办法在不增加代码复杂性的情况下完成此工作？

Answer 1

一个简单的解决方法是，在设置器中增加要更改的属性值。例如：

private bool _oCommonMuteA;
public bool oCommonMuteA
{
    get { return _oCommonMuteA; }
    set 
    { 
        SetField(ref _oCommonMuteA, value); 
        OnPropertyChanged(nameof(oCommonMuteA));
    }
 }

虽然实现了INotifyPropertyChanged，但是ObservableCollection没有更新

1 个答案: