根据属性更改更新行样式选择器

Question

我正在使用RowStyleSelector根据项目为我的Datagridrow着色。绘制行时它工作正常，但在项上的属性更改时不会触发它。由于 inotifyPropertyChange，该项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行样式选择器。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()设置为公共属性，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;
}