Question

有没有办法根据绑定隐藏给定列。我已经尝试在DataGridTextColumn上设置visibility属性（使用正确的转换器），但这似乎不起作用。如果我直接设置值（而不是通过绑定），它就可以工作。列可见性是数据网格的全部或全部处理吗？

Answer 1

你真正需要做的就是添加：

    <Style x:Key="vStyle" TargetType="{x:Type DataGridCell}">
        <Setter Property="Visibility" Value="{Binding YourObjectVisibilityProperty}"/>
    </Style>

然后在列中使用以下内容：

<DataGridTextColumn CellStyle="{StaticResource vStyle}"/>

Answer 2

看看这篇文章，问题解释了 Binding in a WPF data grid text column
在这里 http://blogs.msdn.com/b/jaimer/archive/2008/11/22/forwarding-the-datagrid-s-datacontext-to-its-columns.aspx

从第一个链接引用JaredPar
“基本上问题是DataGridTextColumn没有父级可以从中继承Binding，因为它不是逻辑树或可视树的一部分。您必须设置继承上下文才能访问绑定信息”

解决方法，以使其工作..

public class DataGridContextHelper
{
    static DataGridContextHelper()
    {
        DependencyProperty dp = FrameworkElement.DataContextProperty.AddOwner(typeof(DataGridColumn));
        FrameworkElement.DataContextProperty.OverrideMetadata(typeof(DataGrid),
        new FrameworkPropertyMetadata
           (null, FrameworkPropertyMetadataOptions.Inherits,
           new PropertyChangedCallback(OnDataContextChanged)));
    }

    public static void OnDataContextChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        DataGrid grid = d as DataGrid;
        if (grid != null)
        {
            foreach (DataGridColumn col in grid.Columns)
            {
                col.SetValue(FrameworkElement.DataContextProperty, e.NewValue);
            }
        }
    }
}

public partial class App : Application
{
    static DataGridContextHelper dc = new DataGridContextHelper(); 
}

<DataGrid x:Name="c_dataGrid" AutoGenerateColumns="False" DataContext="{Binding RelativeSource={x:Static RelativeSource.Self}, Path=SelectedItem}">
    <DataGrid.Columns>
        <DataGridTextColumn Visibility="{Binding Path=(FrameworkElement.DataContext), RelativeSource={x:Static RelativeSource.Self}, Converter={StaticResource HideColumnAConverter}}" />
    </DataGrid.Columns>
</DataGrid>

object IValueConverter.Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
    if (value == null)
    {
        return Visibility.Visible;
    }
    // Whatever you're binding against
    TestClass testClass = value as TestClass;
    return testClass.ColumnAVisibility;
}

WPF Datagrid - 设置每行的列可见性

2 个答案: