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我想动态地在userControl上做columnSpan。我创建了转换器类,但它不起作用。你会告诉我如何正确地做到这一点?谢谢。为columnSpan制作转换器
在我的用户代码:
<TextBlock x:Name="txtSumary" Grid.Row="0" Grid.Column="1" Text="{Binding summary}"
TextWrapping="Wrap" Style="{StaticResource PhoneTextAccentStyle}" Grid.ColumnSpan="{Binding isSpan, Converter={StaticResource ColumSpanConverter}}" />
这是对UserControl.Resources参考
<local:VisibilityConverter x:Key="ColumSpanConverter"/>
还有就是转换器类:
public class ColumSpanConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
bool isSpan = (bool)value;
return isSpan ? 2 : 0;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotSupportedException();
}
}
感谢指出我的错误。另外我发现我应该在Convert函数中返回1而不是0。 – user819774 2012-07-30 16:32:30