根据 propertychange 更新 rowstyleselector

Question

我正在使用 RowStyleSelector 根据项目为我的 Datagridrow 着色。它在绘制行时工作正常，但在属性更改项目时不会触发它。由于 inotifyPropertyChange，项目的值显示在数据网格中。

ListViewFileList.RowStyleSelector= new ErrorStyleSelector();
enter code here
private class ErrorStyleSelector : StyleSelector
    {
        public override Style SelectStyle(object item, DependencyObject container)
        {
            if (item is myFile)
            {
                if ((item as myFile).ErrorStatus.IsErrorfile())
                {
                    Style st = new Style(typeof(DataGridRow));
                    st.Setters.Add(new Setter(BackgroundProperty, Brushes.Red));
                    return st;}
}
}

我想在项目更改时触发 RowStyleSelector。不使用 xaml.

编辑

我最终使用了 IvalueConverter

Style st = new Style(typeof(DataGridRow));

        DataTrigger tig = new DataTrigger()
        {
            Binding = new Binding(nameof(myFile.ErrorStatus))
            {
                Converter = new ConverterError(),
            }               
        };

        st.Triggers.Add(tig);
        ListViewFileList.RowStyle = st;

private class ConverterError : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            TRCFile obj = value as myError;
            if (obj!= null && othercondition)
            {
                Style st = new Style(typeof(DataGridRow));                   
                return st;
            }
            return null;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

Answer 1

引发 PropertyChanged 事件时，StyleSelector 不会创建新样式。

您应该将 IsErrorfile() 设为 public 属性并使用 Style:

中的 DataTrigger 绑定到它

myFile myFile = item as myFile;
if(myFile != null)
{
    Style st = new Style(typeof(DataGridRow));
    DataTrigger dataTrigger = new DataTrigger()
    {
        Binding = new Binding("ErrorStatus.IsErrorfile"),
        Value = true
    };
    dataTrigger.Setters.Add(new Setter(BackgroundProperty, Brushes.Red));
    st.Triggers.Add(dataTrigger);
    return st;
}

根据 propertychange 更新 rowstyleselector

Update rowstyleselector based on propertychange

wpf

datagrid

code-behind

ivalueconverter