c# - ObservableCollection<> 不会绑定(bind)更改

Question

我在 WPF 有一张 table 我绑定(bind)了 ObservableCollection<Message> TableData类型列表Message .我将表格行的样式设置为可以读取消息 StatusColor (更改文本的颜色)。当我将元素添加到 ObservableCollection<Message> 时，这同样有效。但是当我改变 StatusColor更改不会在 UI 中更新。

代码:

public class Message 
{
    public string ShortTextMessage { get; set; }
    public string StatusColor { get; set; }
}

xml:

<Style x:Key="DataGridRow"  TargetType="{x:Type DataGridRow}">
    <Setter Property="Foreground" Value="{Binding StatusColor, Mode=TwoWay}"></Setter>
</Style>

<DataGrid ItemsSource="{Binding TableData}" SelectedItem="{Binding TableData, Mode=TwoWay}" RowStyle="{StaticResource DataGridRow}" SelectionUnit="FullRow">

Answer 1

实现INotifyPropertyChanged为您的类(class) Message :

 public abstract class ViewModelBase : INotifyPropertyChanged
    {
        #region INotifyPropertyChanged
        public event PropertyChangedEventHandler PropertyChanged;

        public void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
            ValidateAsync();
        }
        #endregion
}

继承 ViewModelBase :

public class Message:ViewModelBase
{
    private string _shortTextMessage;      
    public string ShortTextMessage 
    {
        get { return _shortTextMessage; }
        set
        {
            _shortTextMessage= value;
            OnPropertyChanged();
        }
    }
    private string _statusColor;      
    public string StatusColor 
    {
        get { return _statusColor; }
        set
        {
            _statusColor= value;
            OnPropertyChanged();
        }
    }
}

那应该行得通。