如何通过用户请求调用IValueConverter？ [XamDataGrid记录索引]
我想在我的XamDataGrid控件中添加像MS Excel这样的记录索引。我使用IValueConverter来使用这个技巧。我定义了一些用于显示记录索引宽度的模板这个XAML代码：
<local:RowNumberConverter x:Key="rowNumberConverter" />
<Style TargetType="{x:Type igDP:RecordSelector}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type igDP:RecordSelector}">
<TextBlock>
<TextBlock.Text>
<MultiBinding Converter="{StaticResource rowNumberConverter}">
<Binding />
<Binding RelativeSource="{RelativeSource FindAncestor, AncestorType={x:Type igDP:XamDataGrid}}"/>
</MultiBinding>
</TextBlock.Text>
</TextBlock>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
class RowNumberConverter : IMultiValueConverter {
#region IMultiValueConverter Members
public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture) {
//get the grid and the item
Object item = values[0];
XamDataGrid grid = values[1] as XamDataGrid;
int index = grid.RecordManager.Unsorted.IndexOf(((DataRecord)item));
return index.ToString();
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture) {
throw new NotImplementedException();
}
#endregion
}
没有找到相关结果
已邀请:
2 个回复
bab
畦桨存灯
#region IMultiValueConverter Members public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture) { if (values != null && values[0] != null) { Record r = values[0] as Record; return (r.VisibleIndex + 1).ToString(); } else return null; } public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture) { throw new NotImplementedException(); } #endregionpublic static readonly DependencyProperty DummyValueProperty = DependencyProperty.Register("DummyValue", typeof(int), typeof(XamRibbonWindow), new UIPropertyMetadata(0)); public int DummyValue { get { return (int)GetValue(DummyValueProperty); } set { SetValue(DummyValueProperty, value); } }<Style TargetType="{x:Type igDP:RecordSelector}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type igDP:RecordSelector}"> <Border BorderBrush="#FFD4D4D4" BorderThickness="0,1.5,1.5,0" Background="#FFF1F1F1"> <TextBlock HorizontalAlignment="Center" Margin="0" TextWrapping="Wrap" VerticalAlignment="Center" FontSize="{Binding Path=FontSize, RelativeSource={RelativeSource AncestorType={x:Type igDP:XamDataGrid}}}"> <TextBlock.Text> <MultiBinding Converter="{StaticResource ResourceKey=rowNumberConverter}"> <Binding /> <Binding Path="DummyValue" RelativeSource="{RelativeSource FindAncestor, AncestorType={x:Type Window}}"/> </MultiBinding> </TextBlock.Text> </TextBlock> </Border> </ControlTemplate> </Setter.Value> </Setter> <Setter Property="MinWidth" Value="50"/> </Style>就这样。祝好运 ：）。