如果您尝试设置DataGrid.CellStyle
DataContext 将是行,因此如果您想根据一个单元格更改颜色,在特定列中执行此操作可能是最简单的,特别是因为列可以具有不同的内容,例如 TextBlocks、ComboBoxes 和 CheckBoxes。这是将所有单元格设置为浅绿色的示例,其中Name
is John
:
<DataGridTextColumn Binding="{Binding Name}">
<DataGridTextColumn.ElementStyle>
<Style TargetType="{x:Type TextBlock}">
<Style.Triggers>
<Trigger Property="Text" Value="John">
<Setter Property="Background" Value="LightGreen"/>
</Trigger>
</Style.Triggers>
</Style>
</DataGridTextColumn.ElementStyle>
</DataGridTextColumn>
您还可以使用ValueConverter http://msdn.microsoft.com/en-us/library/system.windows.data.ivalueconverter.aspx改变颜色。
public class NameToBrushConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
string input = (string)value;
switch (input)
{
case "John":
return Brushes.LightGreen;
default:
return DependencyProperty.UnsetValue;
}
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotSupportedException();
}
}
Usage:
<Window.Resources>
<local:NameToBrushConverter x:Key="NameToBrushConverter"/>
</Window.Resources>
...
<DataGridTextColumn Binding="{Binding Name}">
<DataGridTextColumn.ElementStyle>
<Style TargetType="{x:Type TextBlock}">
<Setter Property="Background" Value="{Binding Name, Converter={StaticResource NameToBrushConverter}}"/>
</Style>
</DataGridTextColumn.ElementStyle>
</DataGridTextColumn>
还有一种选择是直接绑定Background
返回各自颜色画笔的属性。您必须在颜色所依赖的属性设置器中触发属性更改通知。
e.g.
public string Name
{
get { return _name; }
set
{
if (_name != value)
{
_name = value;
OnPropertyChanged(nameof(Name));
OnPropertyChanged(nameof(NameBrush));
}
}
}
public Brush NameBrush
{
get
{
switch (Name)
{
case "John":
return Brushes.LightGreen;
default:
break;
}
return Brushes.Transparent;
}
}