C#/ WPF:使GridViewColumn可见= false？

Question

有谁知道是否有一个隐藏GridViewColumn的选项,如下所示:

<ListView.View>
    <GridView>
        <GridViewColumn Header="Test" IsVisible="{Binding Path=ColumnIsVisible}" />
    </GridView>
<ListView.View>

非常感谢!

编辑:为清楚起见

不幸的是,没有"IsVisible"属性.我正在寻找一种方法来创造它.

编辑:基于反馈的解决方案如下:

<GridViewColumn DisplayMemberBinding="{Binding Path=OptionColumn1Text}" 
                Width="{Binding Path=SelectedEntitiy.OptionColumn1Width}">
    <GridViewColumnHeader Content="{Binding Path=SelectedEntitiy.OptionColumn1Header}" IsEnabled="{Binding Path=SelectedEntitiy.OptionColumn1Width, Converter={StaticResource widthToBool}}" />
</GridViewColumn>

public class WidthToBooleanConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return (int)value > 0;
    }

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

谢谢大家!
干杯

Answer 1

编辑:反映修改后的问题.

如何创建0宽度列？写一个布尔到宽度IValueConverter,它将ColumnIsVisible作为ConverterParmeter？

 public class BooleanToWidthConverter : IValueConverter {
        public object Convert(object value, Type targetType, 
                              object parameter, CultureInfo culture){
            return ((bool) parameter)? value : 0;
        }

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

就像是:

<ListView .. >
 <ListView.Resources>
  <BooleanToWidthConverter x:Key="boolToWidth" />
 </ListView.Resources>

 <ListView.View>
    <GridView>
        <GridViewColumn 
                  Header="Test" 
                  Width=
      "{Binding Path=ColumnWidth, 
                Converter={StaticResource boolToVis}, 
                ConverterParameter=ColumnIsVisible}" />
    </GridView>
 <ListView.View>

Answer 2

这是另一种基于将列宽度设置为零的解决方案.我修改了一下.它现在的工作方式如下:

1. 使用bool-to-visibility转换器将标头的可见性绑定到ViewModel的布尔属性
2. 使用标题上的附加属性将列的宽度设置为零

这是代码.

XAML:

<GridViewColumn
    HeaderTemplate="..." 
    HeaderContainerStyle="...">
    <GridViewColumnHeader 
        Content="Header text" 
        Visibility="{Binding AppliesToColumnVisible, Converter={StaticResource BooleanToVisibilityConverter}}" 
        behaviors:GridViewBehaviors.CollapseableColumn="True" />

BooleanToVisibilityConverter:

public class BooleanToVisibilityConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        bool param = bool.Parse(value.ToString());
        if (param == true)
            return Visibility.Visible;
        else
            return Visibility.Collapsed;
    }

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

附加行为GridViewBehaviors.CollapseableColumn:

public static readonly DependencyProperty CollapseableColumnProperty =
     DependencyProperty.RegisterAttached("CollapseableColumn", typeof(bool), typeof(GridViewBehaviors),
    new UIPropertyMetadata(false, OnCollapseableColumnChanged));

public static bool GetCollapseableColumn(DependencyObject d)
{
    return (bool)d.GetValue(CollapseableColumnProperty);
}

public static void SetCollapseableColumn(DependencyObject d, bool value)
{
    d.SetValue(CollapseableColumnProperty, value);
}

private static void OnCollapseableColumnChanged(DependencyObject sender, DependencyPropertyChangedEventArgs args)
{
    GridViewColumnHeader header = sender as GridViewColumnHeader;
    if (header == null)
        return;

    header.IsVisibleChanged += new DependencyPropertyChangedEventHandler(AdjustWidth);
}

static void AdjustWidth(object sender, DependencyPropertyChangedEventArgs e)
{
    GridViewColumnHeader header = sender as GridViewColumnHeader;
    if (header == null)
        return;

    if (header.Visibility == Visibility.Collapsed)
        header.Column.Width = 0;
    else
        header.Column.Width = double.NaN;   // "Auto"
}