如何绑定DataGridTextColumn知名度

Question

我想DataGrid的可见性结合为GreatTall1在他的岗位建议从这个thread

using System; 
using System.ComponentModel; 
using System.Windows; 
using System.Windows.Controls; 
using System.Windows.Data; 

namespace XYZ.Controls 
{ 
public class ExtendedDataGridTextColumn : DataGridTextColumn 
{ 
private readonly Notifier _e; 
private Binding _visibilityBinding; 
public Binding VisibilityBinding 
{ 
    get { return _visibilityBinding; } 
    set 
    { 
     _visibilityBinding = value; 
     _e.SetBinding(Notifier.MyVisibilityProperty, _visibilityBinding); 
    } 
} 
public ExtendedDataGridTextColumn() 
{ 
    _e = new Notifier(); 
    _e.PropertyChanged += ToggleVisibility; 
} 

private void ToggleVisibility(object sender, PropertyChangedEventArgs e) 
{ 
    if (e.PropertyName == "Visibility") 
     this.Visibility = _e.MyVisibility; 
} 

//Notifier class is just used to pass the property changed event back to the column container Dependency Object, leaving it as a private inner class for now 
private class Notifier : FrameworkElement, INotifyPropertyChanged 
{ 
    public event PropertyChangedEventHandler PropertyChanged; 

    public Visibility MyVisibility 
    { 
     get { return (Visibility)GetValue(MyVisibilityProperty); } 
     private set { SetValue(MyVisibilityProperty, value); } 
    } 

    public static readonly DependencyProperty MyVisibilityProperty = DependencyProperty.Register("MyVisibility", typeof(Visibility), typeof(Notifier), new PropertyMetadata(MyVisibilityChanged)); 

    private static void MyVisibilityChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) 
    { 
     var n = d as Notifier; 
     if (n != null) 
     { 
      // n.MyVisibility = (Visibility) e.NewValue; 
      n.PropertyChanged(n, new PropertyChangedEventArgs("Visibility")); 
     } 
    } 
} 

}

我已经加入了类，我的解决方案，并尝试到DataGridTextColumn知名度绑定到我的IdVisibility财产

<sdk:DataGrid x:Name="dgResult" Grid.Row="0" VerticalAlignment="Stretch" SelectionMode="Single" HorizontalAlignment="Stretch" AutoGenerateColumns="False" ItemsSource="{Binding IdSearchList}" IsReadOnly="True" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto" Margin="10" Visibility="{Binding IsResultVisible}"> 

<extDg:ExtendedDataGridTextColumn Binding="{Binding Id}" VisibilityBinding="{Binding IdVisibility}" Header="Asset ID" Width="50"/> 



    private Visibility idVisibility = Visibility.Collapsed; 

    public Visibility IdVisibility 
    { 
     get { return idVisibility; } 
     set { idVisibility = value; NotifyPropertyChanged("IdVisibility"); } 
    } 

总是被无论在显示IdVisib的值的列ility。

请，可能有人指出我在做什么错？这是一个SL4应用

感谢

Answer 1

我认为你应该使用可视性转换器还可以绑定与设计师与此转换器

Public NotInheritable Class VisibilityConverter 
     Implements IValueConverter 

     Public Function Convert(ByVal value As Object, ByVal targetType As System.Type, ByVal parameter As Object, ByVal culture As System.Globalization.CultureInfo) As Object Implements System.Windows.Data.IValueConverter.Convert 

      If Not targetType Is GetType(Visibility) Then 

       Throw New ArgumentOutOfRangeException("targetType", "VisibilityConverter can only convert to Visibility") 

      End If 

      Dim _visibility As Visibility = Visibility.Visible 

      If value Is Nothing Then 

       _visibility = Visibility.Collapsed 

      End If 

      If TypeOf (value) Is Boolean Then 

       _visibility = IIf(value, Visibility.Visible, Visibility.Collapsed) 

      End If 

      If TypeOf (value) Is String Then 

       _visibility = IIf(String.IsNullOrEmpty(value), Visibility.Collapsed, Visibility.Visible) 

      End If 

      Return _visibility 

     End Function 

     Public Function ConvertBack(ByVal value As Object, ByVal targetType As System.Type, ByVal parameter As Object, ByVal culture As System.Globalization.CultureInfo) As Object Implements System.Windows.Data.IValueConverter.ConvertBack 

      Throw New ArgumentOutOfRangeException("targetType", "VisibilityConverter can only convert to Boolean") 

     End Function 
    End Class