更改 WPF DataGrid 选择/取消选择（WPF、VB.NET、WinForms）中单元格的背景色

Question

我有 WPF 表单，里面有一个 DataGrid。当表单加载或没有焦点时，第一个单元格上有一个白色突出显示。如果我单击 gridview 或当表单获得焦点时，当前单元格变为蓝色（我设置的选择颜色）。见图片：

'失去焦点

获得焦点

当数据网格没有焦点时，我想删除白色突出显示，即它应该看起来像该行中的其他单元格。我必须处理的属性或事件是什么？

        <DockPanel Name="DocHolder" >            
           <DataGrid x:Name="dataGrid1" MaxHeight="100" AutoGenerateColumns="False" HeadersVisibility="Column" SelectionUnit="Cell" FontSize="11" 
                 VerticalContentAlignment="Center" 
                  HorizontalGridLinesBrush="#FFC7BDBD" AlternatingRowBackground="#690BB9F8"
                  EnableColumnVirtualization="False" EnableRowVirtualization="False" GridLinesVisibility="None"
                CanUserResizeColumns="False"  CanUserResizeRows="False"  CanUserReorderColumns="False" CanUserAddRows="False"  CanUserDeleteRows="False"  
                ClipboardCopyMode="ExcludeHeader" HorizontalScrollBarVisibility="Disabled"  MinRowHeight="20"  OverridesDefaultStyle="False"
                Style="{DynamicResource scGrid}" ColumnHeaderStyle="{DynamicResource scGridHeader}">

                <DataGrid.BorderBrush> <SolidColorBrush /> </DataGrid.BorderBrush>
                <DataGrid.RowBackground> <SolidColorBrush /></DataGrid.RowBackground>
                <DataGrid.Background> <SolidColorBrush /> </DataGrid.Background>
                <DataGrid.Columns>
                    <DataGridTextColumn Header="GID"  DisplayIndex="0" Visibility="Hidden"   Binding="{Binding GID}" />
                    <DataGridTextColumn Header="Region" DisplayIndex="1" IsReadOnly="True" Binding="{Binding AreaName}" CellStyle="{StaticResource CellGotFocus}" HeaderStyle="{StaticResource HeaderStyle}" />
                    <DataGridTextColumn Header="Grps"  DisplayIndex="2" IsReadOnly="True" Binding="{Binding GName}" CellStyle="{StaticResource FocusAndShowElementData}" HeaderStyle="{StaticResource HeaderStyle}" />
                    <DataGridTextColumn Header="Thk"   DisplayIndex="3" Binding="{Binding Thick}"  IsReadOnly="True" CellStyle="{StaticResource CellGotFocus}"  HeaderStyle="{StaticResource HeaderStyle}"/>
                    <DataGridTextColumn Header="TX"   DisplayIndex="4" Binding="{Binding TopX}" IsReadOnly="True" CellStyle="{StaticResource CellGotFocus}" HeaderStyle="{StaticResource HeaderStyle}"/>
                    <DataGridTextColumn Header="TY"   DisplayIndex="5" Binding="{Binding TopY}" IsReadOnly="True" CellStyle="{StaticResource CellGotFocus}" HeaderStyle="{StaticResource HeaderStyle}"/>
                    <DataGridTextColumn Header="BX"  DisplayIndex="6" Binding="{Binding BottomX}" IsReadOnly="True" CellStyle="{StaticResource CellGotFocus}"  HeaderStyle="{StaticResource HeaderStyle}"/>
                    <DataGridTextColumn Header="BY"   DisplayIndex="7" Binding="{Binding BottomY}" IsReadOnly="True" CellStyle="{StaticResource CellGotFocus}" HeaderStyle="{StaticResource HeaderStyle}"/>
                    <DataGridComboBoxColumn Header="DTX"  DisplayIndex="8" TextBinding ="{Binding BTopX, Mode=TwoWay}" x:Name="cmbBTopX" CellStyle="{StaticResource CellGotFocus}" HeaderStyle="{StaticResource HeaderStyle}" ElementStyle="{StaticResource scDGCombo}"/>
                    <DataGridTextColumn Header="STX"  DisplayIndex="9" Binding="{Binding BTopX, Mode=TwoWay}" CellStyle="{StaticResource CellGotFocus}" HeaderStyle="{StaticResource HeaderStyle}" />
                    <DataGridComboBoxColumn Header="DTY"  DisplayIndex="10" TextBinding ="{Binding BTopY, Mode=TwoWay}" x:Name="cmbBTopY" CellStyle="{StaticResource CellGotFocus}" HeaderStyle="{StaticResource HeaderStyle}" ElementStyle="{StaticResource scDGCombo}"/>
                    <DataGridTextColumn Header="STY"   DisplayIndex="11" Binding="{Binding BTopY, Mode=TwoWay}" CellStyle="{StaticResource CellGotFocus}" HeaderStyle="{StaticResource HeaderStyle}" />
                    <DataGridComboBoxColumn Header="DBX"  DisplayIndex="12" TextBinding ="{Binding BBottomX, Mode=TwoWay}"  x:Name="cmbBBottomX" CellStyle="{StaticResource CellGotFocus}" HeaderStyle="{StaticResource HeaderStyle}" ElementStyle="{StaticResource scDGCombo}"/>
                    <DataGridTextColumn Header="SBX" DisplayIndex="13" Binding="{Binding SBottomX, Mode=TwoWay}" CellStyle="{StaticResource CellGotFocus}" HeaderStyle="{StaticResource HeaderStyle}"/>
                    <DataGridComboBoxColumn Header="DBY"  DisplayIndex="14" TextBinding ="{Binding BBottomY, Mode=TwoWay}" x:Name="cmbBBottomY" CellStyle="{StaticResource CellGotFocus}" HeaderStyle="{StaticResource HeaderStyle}" ElementStyle="{StaticResource scDGCombo}"/>
                    <DataGridTextColumn Header="SBY"  DisplayIndex="15" Binding="{Binding BBottomY, Mode=TwoWay}" CellStyle="{StaticResource CellGotFocus}" HeaderStyle="{StaticResource HeaderStyle}" />
            </DataGrid.Columns>               
        </DataGrid>            
    </DockPanel>                       

Answer 1

你必须覆盖datagrid单元格的单元格模板

<Style TargetType="{x:Type DataGridCell}">
    <Style.Triggers>
        <Trigger Property="IsSelected" Value="True">
            <Setter Property="Background" Value="Red"/>
        </Trigger>
        <Trigger Property="IsSelected" Value="False">
            <Setter Property="Background" Value="Red"/>
        </Trigger>
    </Style.Triggers>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type DataGridCell}">
                <Border Background="{TemplateBinding Background}">
                    <ContentPresenter VerticalAlignment="Center"></ContentPresenter>
                </Border>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

这只是一个你可以参考的例子，像这样你可以做任何你想要的模板

希望这会有所帮助。