当我将文本输入DoubleUpDown
控件时,它会被重置并且控件以红色突出显示。
它看起来像这样:
如何将相同的样式应用于负数?
我是通过创建PositiveNumberToColorConverter
并将其应用于魔法边框来实现的:
public class PositiveNumberToColorConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
if(value is int?)
{
var intValue = (int?)value;
if (intValue == null)
return Brushes.Transparent;
else if (intValue.HasValue&&intValue.Value>=0)
return Brushes.Transparent;
else if(intValue.HasValue==false)
return Brushes.Transparent;
return Brushes.Red;
}
return Brushes.Red;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
}
<Border
Grid.Column="0"
BorderThickness="1"
Background="Transparent"
BorderBrush="{Binding ObjectViewModel.Value,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged,Converter={StaticResource positiveNumberConverter}}"
IsEnabled="{Binding ObjectViewModel.IsEnabled,Mode=TwoWay,TargetNullValue=False,FallbackValue=False,UpdateSourceTrigger=PropertyChanged}"
>
<xcd:DoubleUpDown
HorizontalAlignment="Stretch"
Margin="5"
Grid.Column="0"
Minimum="0"
Height="{Binding ElementName=tbName,Path=Height}"
Width="Auto"
IsEnabled="{Binding ObjectViewModel.IsEnabled,Mode=TwoWay,TargetNullValue=False,FallbackValue=False,UpdateSourceTrigger=PropertyChanged}"
Text="{Binding ObjectViewModel.Value,Mode=TwoWay,UpdateSourceTrigger=LostFocus}" >
<xcd:DoubleUpDown.Resources>
<Style TargetType="Popup">
<Setter Property="TextBlock.TextAlignment" Value="Left"/>
</Style>
</xcd:DoubleUpDown.Resources>
</xcd:DoubleUpDown>
</Border>
但是,它看起来像这样:
如何在输入负数时将其突出显示为第一张图片(默认情况下如何在文本输入中实现控制)?
答案 0 :(得分:1)
如果您不让用户输入负值,则应将Minimum
属性设置为0
:
<xctk:DoubleUpDown ... Minimum="0" />
您看到的红色边框是默认Validation.ErrorTemplate
的一部分。