如何綁定DataGridTextColumn知名度

Question

我想DataGrid的可見性結合爲GreatTall1在他的崗位建議從這個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")); 
     } 
    } 
} 

}

我已經加入了類，我的解決方案，並嘗試到DataGridTextColumn知名度綁定到我的IdVisibility財產

<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"); } 
    } 

總是被無論在顯示IdVisib的值的列ility。

請，可能有人指出我在做什麼錯？這是一個SL4應用

感謝

Answer 1

我認爲你應該使用可視性轉換器還可以綁定與設計師與此轉換器

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