How to show the DropDown arrow in WPF DataGrid GridComboBoxColumn?
In WPF DataGrid (SfDataGrid), the drop-down arrow for GridComboBoxColumn will be shown only in the edit mode. You can differentiate the combo box column from other columns by showing the drop-down arrow in the display mode by using CellStyle property of the corresponding column.
<Window.Resources>
<Style x:Key="comboBoxCellStyle" TargetType="syncfusion:GridCell">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="syncfusion:GridCell">
<Grid SnapsToDevicePixels="True">
<Border Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
SnapsToDevicePixels="True">
<Grid>
<ContentPresenter Margin="{TemplateBinding Padding}" />
<Path Width="5.3"
Height="4.2"
Margin="0,0,7,0"
HorizontalAlignment="Right"
VerticalAlignment="Center"
Data="F1M0,0L2.667,2.66665 5.3334,0 5.3334,-1.78168 2.6667,0.88501 0,-1.78168 0,0z"
Fill="Gray"
Stretch="Uniform" />
</Grid>
</Border>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
<Grid>
<syncfusion:SfDataGrid Name="dataGrid"
Margin="20"
AutoGenerateColumns="False"
AllowEditing="True"
ColumnSizer="Auto"
ItemsSource="{Binding Employees}">
<syncfusion:SfDataGrid.Columns>
<syncfusion:GridComboBoxColumn MappingName="Country" ItemsSource="{Binding Countries}" CellStyle="{StaticResource comboBoxCellStyle}">
</syncfusion:GridComboBoxColumn>
</syncfusion:SfDataGrid.Columns>
</syncfusion:SfDataGrid>
</Grid>
Take a moment to peruse the documentation, where you can find about GridComboBoxColumn in SfDataGrid, with code examples.
You can download the example from GitHub
Conclusion
I hope you enjoyed learning about how to show the DropDown arrow in WPF DataGrid (SfDataGrid) GridComboBoxColumn.
You can refer to our WPF DataGrid feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our WPF DataGrid example to understand how to create and manipulate data.
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