C＃/ WPF：做一个GridViewColumn可见=假？(C#/WPF: Make a Grid

有谁知道是否有以某种方式隐藏GridViewColumn这样一个选项：

<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“可见性”属性。我正在寻找一种方式来创建。

编辑：根据反馈的解决方案是这样的：

<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：反映修改问题。

怎么样建立一个0宽度列？写一个布尔值来宽的IValueConverter，这需要一个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:

这是一个基于列的宽度设置为零另一种解决方案。我已经修改了一点。现在是这样的：

绑定头的知名度视图模型的布尔属性，使用布尔到可视性转换器
使用附加属性的报头以设置列的宽度为零

下面是代码。

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();
    }
}

附加的行为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"
}

Answer 3:

我已经设置列宽度=“0”到零。现在列看起来像它不可见。但我不知道这是否会影响到别的。这可能是一个虚拟的解决方案，但现在它的工作原理。

Answer 4:

一个更简单的方法，即仍使用设置的列的概念宽度为零，但不具有使用的副作用IValueConverter （用户仍然可以拖动列更宽）是创建一个新的getter / setter返回基于一个宽度您ColumnIsVisible变量，然后绑定到：

public double ColumnWidth
{
    get
    {
        if (this.ColumnIsVisible)
        {
            return 100;
        }
        else
        {
            return 0;
        }
    }

    set
    {
        OnPropertyChanged("ColumnWidth");
    }
}

让你的双向绑定，如果用户试图拖动宽列OnPropertyChanged将被调用，宽度重置为0。您可能需要使用虽然有约束力的代理进行绑定。也加入到呼叫OnPropertyChanged("ColumnWidth")当过ColumnIsVisible更新:)

Answer 5:

如果使用可Thumb.DragDelta解决问题

我用它作为列表视图

<ListView x:Name="MyListView"IsSynchronizedWithCurrentItem="True"   
      ItemsSource="{Binding Path=Items}",  Mode=Default, Source={StaticResource DataProvider}}" 
      Thumb.DragDelta="Thumb_DragDelta">


public Window1()
{   
InitializeComponent(); 
MyListView.AddHandler(Thumb.DragDeltaEvent, new DragDeltaEventHandler(Thumb_DragDelta), true );

void Thumb_DragDelta(object sender, DragDeltaEventArgs e)
{  
 Thumb senderAsThumb = e.OriginalSource as Thumb;    
 GridViewColumnHeader header = senderAsThumb.TemplatedParent as GridViewColumnHeader;     
 if (header.Column.ActualWidth < MIN_WIDTH)   
 {   
    header.Column.Width = MIN_WIDTH;  
 }  
 if (header.Column.ActualWidth > MAX_WIDTH)     
 {      
    header.Column.Width = MAX_WIDTH;   
 }
}
}

文章来源: C#/WPF: Make a GridViewColumn Visible=false?