這就是我最終做的。我寧願在DataGrid上使用Property,但由於不存在這樣的屬性,所以我需要一個解決方法。
首先,我只是用ActualWidth的從父DataGrid和去除恆定的9.這個工作在第一,但在垂直滾動條變爲可見的失敗,所以我不得不使用一個MultiBinding。
<DataGrid.RowDetailsTemplate>
<DataTemplate>
<Border HorizontalAlignment="Left" CornerRadius="5"
BorderBrush="Red" BorderThickness="2" Background="Black">
<Border.Width>
<MultiBinding Converter="{StaticResource RowDetailsWidthMultiConverter}"
ConverterParameter="9">
<Binding RelativeSource="{RelativeSource AncestorType={x:Type DataGrid}}"
Path="ActualWidth"/>
<Binding RelativeSource="{RelativeSource AncestorType={x:Type ScrollViewer}}"
Path="ComputedVerticalScrollBarVisibility"/>
</MultiBinding>
</Border.Width>
<TextBlock Foreground="White" Text="{Binding RowDetails}" TextWrapping="Wrap"/>
</Border>
</DataTemplate>
</DataGrid.RowDetailsTemplate>
而在轉換器中,我用另一個常量(16)來補償可見的垂直滾動條(如果它是可見的)。
public class RowDetailsWidthMultiConverter : IMultiValueConverter
{
public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
double originalWidth = (double)values[0];
Visibility verticalScrollbarVisibility = (Visibility)values[1];
double subtractWidth = System.Convert.ToDouble(parameter);
double returnWidth = originalWidth - subtractWidth;
if (verticalScrollbarVisibility == Visibility.Visible)
{
return returnWidth - 16;
}
return returnWidth;
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
{
return null;
}
}
更新
我的溶液一點改進,採用ActualWidth的用於ItemsPresenter而不是數據網格,從而去除(其中ActualWidth的不依賴於可見滾動條改變)需要一個MultiConverter和兩個常量。
<DataGrid.Resources>
<local:SubtractConstantConverter x:Key="SubtractConstantConverter"/>
</DataGrid.Resources>
<DataGrid.RowDetailsTemplate>
<DataTemplate>
<Border HorizontalAlignment="Left" CornerRadius="5"
BorderBrush="Red" BorderThickness="2" Background="Black"
Width="{Binding RelativeSource={RelativeSource AncestorType={x:Type ItemsPresenter}},
Path=ActualWidth,
Converter={StaticResource SubtractConstantConverter},
ConverterParameter=6}">
<TextBlock Foreground="White" Text="{Binding RowDetails}" TextWrapping="Wrap"/>
</Border>
</DataTemplate>
</DataGrid.RowDetailsTemplate>
SubtractConstantConverter
public class SubtractConstantConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
double originalValue = (double)value;
double subtractValue = System.Convert.ToDouble(parameter);
return originalValue - subtractValue;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
return null;
}
}
與您的更新版本與ItemsPresenter作爲祖先垂直滾動條不尊重。我減去22來避免水平滾動條。 – user2452157 2016-06-29 16:24:18