Silverlight Visibility 属性的绑定

Silverlight 控件的Visibility属性不能直接用true或者false绑定，而是要通过一个Converter来实现：

 

VisibilityConverter类代码：

using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows; using Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Windows.Data; namespace DMS.Controls { public class VisibilityConverter:IValueConverter { public VisibilityConverter() { } public object Convert(object value,Type <a href="/tag/targettype/" target="_blank" class="keywords">targettype</a>,object p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>meter,Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Globalization.CultureInfo culture) { if (value == null) return Visibility.Collapsed; bool s = (bool)value; return (s != true) ? Visibility.Collapsed : Visibility.Visible; } public object ConvertBack(object value,Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.Globalization.CultureInfo culture) { throw new NotImplementedException(); } } }

 

在XAML里引用这个类：

<sdk:DataGrid AutoGenerateColumns="False" Height="284" HorizontalAlignment="Left" Margin="5,63,0" Name="OrderList" VerticalAlignment="Top" Width="798" ItemsSource="{Binding}"> <sdk:DataGrid.Resources > <local:VisibilityConverter x:Key="iconverter"/> </sdk:DataGrid.Resources> <sdk:DataGrid.Columns > <sdk:DataGridTemplateColumn Header="按钮是否可见示范绑定" Width="Auto"> <sdk:DataGridTemplateColumn.CellTemplate> <DataTemplate> <StackPanel Orientation="Horizontal" HorizontalAlignment="Left"> <TextBlock Width="Auto" Text="订单类别:"/> <Button x:Name="XSJX_Confirm" Content="确认订单" Visibility="{Binding Path=XSJL_VISABLE,Converter={StaticResource iconverter}}"/> </StackPanel> </DataTemplate> </sdk:DataGridTemplateColumn.CellTemplate> </sdk:DataGridTemplateColumn> </sdk:DataGrid.Columns> </sdk:DataGrid>

 

其中： XSZJ_VISABLE 是bool 类型，= true 按钮可见；=false 按钮不可见，通过VisibilityConverter转成

Visibility.Collapsed 或 Visibility.Visible。