[英]Change BorderBrush Colour of Wpf DatagridTemplateColumn dynamically
在我的 wpf 项目中,我制作了一个IMultiValueConverter
,它将像这样改变我的 DataGridCells 的前景:
class CellForegroundMultiValueConverter : IMultiValueConverter
{
#region Implementation of IMultiValueConverter
/// <inheritdoc />
public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
{
SolidColorBrush mainred = new SolidColorBrush(System.Windows.Media.Color.FromRgb(223,70,75));
var columnHeader = values[0] as string;
var dataItem = values[1] as Task;
if( columnHeader.Equals("Status", StringComparison.OrdinalIgnoreCase)
&& dataItem.Status.Equals("Success!", StringComparison.OrdinalIgnoreCase))
{
return mainred;
}
if( columnHeader.Equals("#", StringComparison.OrdinalIgnoreCase))
{
return mainred;
}
if( columnHeader.Equals("Proxy"))
{
if(dataItem.Proxy)
{
return Brushes.LightGreen;
}
return mainred;
}
return Brushes.White;
}
public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture) => throw new NotSupportedException();
#endregion
}
它像这样链接到我的 DataGrid:
<DataGrid.CellStyle>
<Style TargetType="{x:Type DataGridCell}">
...
<Setter Property="Foreground">
<Setter.Value>
<MultiBinding>
<MultiBinding.Converter>
<local:CellForegroundMultiValueConverter />
</MultiBinding.Converter>
<Binding RelativeSource="{RelativeSource Self}" Path="Column.Header"/>
<Binding/>
<Binding Path="HasChanges" />
</MultiBinding>
</Setter.Value>
</Setter>
</Style>
</DataGrid.CellStyle>
我有一个 DataGridTemplateColumn 显示您在 DataGrid 中拥有的项目数,如下所示:
<DataGridTemplateColumn Width="*" Header="#" MaxWidth="60">
<DataGridTemplateColumn.HeaderStyle>
<Style BasedOn="{StaticResource MaterialDesignDataGridColumnHeader}" TargetType="{x:Type DataGridColumnHeader}">
<Setter Property="HorizontalAlignment" Value="Left" />
</Style>
</DataGridTemplateColumn.HeaderStyle>
<DataGridTemplateColumn.CellStyle>
<Style TargetType="{x:Type DataGridCell}">
<Setter Property="Padding" Value="20"/>
<!--<Setter Property="Height" Value="57"/>-->
<Setter Property="BorderBrush">
<Setter.Value>
<MultiBinding>
<MultiBinding.Converter>
<local:CellForegroundMultiValueConverter />
</MultiBinding.Converter>
<Binding RelativeSource="{RelativeSource Self}" Path="Column.Header"/>
<Binding/>
<Binding Path="HasChanges" />
</MultiBinding>
</Setter.Value>
</Setter>
</Style>
</DataGridTemplateColumn.CellStyle>
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Border Background="#262626" CornerRadius="5,5,5,5" BorderThickness="2" BorderBrush="{Binding StatusColour}">
<Border.Style>
<Style TargetType="Border">
</Style>
</Border.Style>
<TextBlock Text="{Binding NumberOTasks}" FontWeight="Bold" HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="15" Foreground="#E43D47"/>
</Border>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
如果我将IMultiValueConverter
放在DataGridTemplateColumn.CellStyle
它可以工作并为边框添加颜色,但它不受边框角半径的影响,但是如果我将它放在边框样式上,它就不起作用并说列标题为 = null。 我怎样才能改变边框刷并且它会受到边框的拐角半径的影响?
要更改内部网格边框,您需要覆盖DataGridCell
的默认模板并从那里修改边框属性。 请记住,有两个模板的ContentControl
:一个ControlTemplate
为ContentControl
本身(例如ListBoxItem
或DataGridCell
)和DataTemplate
的内容ContentControl
。
<DataGridTemplateColumn.CellStyle>
<Style TargetType="DataGridCell">
<Setter Property="Background" Value="#262626">
<Setter Property="BorderBrush">
<Setter.Value>
<MultiBinding>
<MultiBinding.Converter>
<local:CellForegroundMultiValueConverter />
</MultiBinding.Converter>
<Binding RelativeSource="{RelativeSource Self}" Path="Column.Header"/>
<Binding/>
<Binding Path="HasChanges" />
</MultiBinding>
</Setter.Value>
</Setter>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="DataGridCell">
<Border BorderThickness="{TemplateBinding BorderThickness}"
BorderBrush="{TemplateBinding BorderBrush}"
Background="{TemplateBinding Background}"
CornerRadius="5">
<ContentPresenter />
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</DataGridTemplateColumn.CellStyle>
您可以为每列设置单元格样式或使用基于值的全局单元格样式:
<DataGrid xmlns:system="clr-namespace:System;assembly=mscorlib">
<DataGrid.Resources>
<Style TargetType="DataGridCell">
<Style.Triggers>
<DataTrigger Binding="{Binding}"
Value="Proxy">
<Setter Property="Foreground"
Value="LightGreen" />
<Setter Property="BorderBrush"
Value="LightGreen" />
</DataTrigger>
<DataTrigger Binding="{Binding}"
Value="#">
<Setter Property="Foreground"
Value="Gray" />
<Setter Property="BorderBrush"
Value="Red" />
</DataTrigger>
</Style.Triggers>
</Style>
</DataGrid.Resources>
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding}"
Header="#" />
<DataGridTextColumn Binding="{Binding}"
Header="Proxy" />
<DataGridTextColumn Binding="{Binding}"
Header="Status">
<DataGridTextColumn.CellStyle>
<Style TargetType="DataGridCell">
<Setter Property="Foreground"
Value="Blue" />
<Setter Property="BorderBrush"
Value="Blue" />
</Style>
</DataGridTextColumn.CellStyle>
</DataGridTextColumn>
</DataGrid.Columns>
<system:String>Proxy</system:String>
<system:String>#</system:String>
<system:String>Success</system:String>
</DataGrid>
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