.NET MAUI DataGrid Aggregates Styling
The .NET MAUI DataGrid provides a styling functionality for its group footer, header, and column footer aggregates.
Style the Group Header
The Telerik UI for .NET MAUI DataGrid provides the GroupHeaderStyle (of type Style with target type DataGridGroupHeaderAppearance) configuration, which defines the style of the GroupHeader and the aggregates inside the header.
To visualize the aggregates in the DataGrid group header, set the
ShowGroupHeaderAggregatestoTrue. The property is a property inside theRadDataGridinstance.
Use the following properties to style the GroupHeader:
| Property | Description |
|---|---|
BackgroundColor |
Defines the color that fills the area within the header. |
BorderColor |
Defines the color that fills the border region. |
BorderThickness |
Defines the thickness of the border. |
ButtonFontAttributes |
Defines the font attributes for the expand/collapse symbol for the group headers. |
ButtonFontFamily |
Defines the font family for the expand/collapse symbol of the GroupHeader. |
ButtonFontSize |
Defines the font size for the expand/collapse symbol of the GroupHeader. |
ButtonMargin |
Defines the margin for the expand/collapse symbol of the GroupHeader. |
ButtonTextColor |
Defines the color for the expand/collapse symbol of the GroupHeader. |
TextColor |
Defines the color for the text part of the GroupHeader
|
TextFontAttributes |
Defines the font attributes for the text part of the GroupHeader. |
TextFontFamily |
Defines the font family for the text part of the GroupHeader. |
TextFontSize |
Defines the size for the text part of the GroupHeader. |
TextMargin |
Defines the margin for the text part of the GroupHeader. |
Style the Aggregates in the Group Header
You can style the appearance of the aggregate results in the group header by setting the following properties to the GroupHeaderStyle:
| Property | Description |
|---|---|
AggregatesTextColor |
Defines the color for the aggregates part of the GroupHeader
|
AggregatesTextFontAttributes |
Defines the font attributes for the aggregates part of the GroupHeader
|
AggregatesTextFontFamily |
Defines the font family of the aggregates part of the GroupHeader
|
AggregatesTextFontSize |
Defines the size of the aggregates part of the GroupHeader
|
AggregatesTextMargin |
Defines the margin for the aggregates part of the GroupHeader
|
The following example shows how to style the aggregate results in the group header when setting the GroupHeaderStyle in the page's resources:
<Style x:Key="GroupHeaderStyle" TargetType="telerik:DataGridGroupHeaderAppearance" >
<Setter Property="BorderThickness" Value="0, 1" />
<Setter Property="BorderColor" Value="#8660C5" />
<Setter Property="TextColor" Value="#8660C5" />
<Setter Property="TextFontAttributes" Value="Italic" />
<Setter Property="AggregatesTextColor" Value="#8660C5" />
<Setter Property="AggregatesTextFontAttributes" Value="Italic" />
</Style>
Style the Group Footer
The DataGrid provides the following options for styling its group footer:
-
GroupFooterStyle(of typeStylewith target typeDataGridColumnFooterAppearance)—Defines the style of theGroupFooterand the aggregates inside the footer. -
GroupFooterStyleSelector(IStyleSelector)—Defines the style of the selectedGroupFooterby passing theGroupFooterContextin the selector. -
FooterStyle(of typeStylewith target typeDataGridColumnFooterAppearance)—Defines the style of the Column Footer and the aggregates inside the Column Footer.
To visualize the
GroupFooter, set theShowGroupFootersproperty toTrue. The property is a property inside theRadDataGridinstance.
The following example shows how to define the GroupFooterStyle in XAML:
<Style x:Key="GroupFooterStyle" TargetType="telerik:DataGridGroupFooterAppearance" >
<Setter Property="BorderThickness" Value="0, 1" />
<Setter Property="BorderColor" Value="BlueViolet" />
<Setter Property="TextColor" Value="BlueViolet" />
<Setter Property="TextFontAttributes" Value="Italic" />
</Style>
The following example shows how to use the GroupFooterStyleSelector property:
1. Define the class to which the GroupFooterContext will be passed.
class CustomGroupFooterStyleSelector : IStyleSelector
{
public Style CustomStyle { get; set; }
public Style SelectStyle(object item, BindableObject container)
{
if (item is GroupFooterContext footerContext
&& footerContext.Group.Key.ToString() == "Video Card"
&& footerContext.Column is DataGridTypedColumn column
&& column.PropertyName == "Quantity")
{
return this.CustomStyle;
}
return null;
}
}
2. Define the style selector which will passed to the DataGrid in XAML.
<local:CustomGroupFooterStyleSelector x:Key="GroupFooterStyleSelectorResource">
<local:CustomGroupFooterStyleSelector.CustomStyle>
<Style TargetType="telerik:DataGridGroupFooterAppearance">
<Setter Property="BorderThickness" Value="0, 1" />
<Setter Property="BorderColor" Value="BlueViolet" />
<Setter Property="TextFontAttributes" Value="Bold" />
<Setter Property="VerticalTextAlignment" Value="End" />
</Style>
</local:CustomGroupFooterStyleSelector.CustomStyle>
</local:CustomGroupFooterStyleSelector>
For the DataGrid
GroupFooterAggregates styling example refer to the SDKBrowser Demo application and navigate to the DataGrid > Aggregates category.
Customizing the Group Footer Appearance
Customizing the footer in the DataGrid also changes the appearance of the aggregates inside the component.
The following example demonstrates how to change the style of the column footer aggregates:
1. Define the footer style in XAML.
<Style x:Key="FooterStyle" TargetType="telerik:DataGridColumnFooterAppearance">
<Setter Property="BorderThickness" Value="0, 1" />
<Setter Property="BorderColor" Value="PaleVioletRed" />
<Setter Property="TextColor" Value="PaleVioletRed" />
<Setter Property="TextFontAttributes" Value="Italic" />
</Style>
2. Add the styling to the DataGrid.
<telerik:RadDataGrid x:Name="dataGrid"
AutoGenerateColumns="False"
ShowGroupFooters="True"
ShowColumnFooters="True"
GroupFooterStyleSelector="{StaticResource GroupFooterStyleSelectorResource}"
UserGroupMode="Disabled"
GroupFooterStyle="{StaticResource GroupFooterStyle}"
UserEditMode="Cell">
<telerik:RadDataGrid.Columns>
<telerik:DataGridTextColumn PropertyName="Name"
FooterStyle="{StaticResource FooterStyle}">
<telerik:DataGridTextColumn.AggregateDescriptors>
<telerik:PropertyAggregateDescriptor PropertyName="Name"
Function="Count"
Caption="Total count: " />
</telerik:DataGridTextColumn.AggregateDescriptors>
</telerik:DataGridTextColumn>
<telerik:DataGridNumericalColumn PropertyName="Price"
FooterStyle="{StaticResource FooterStyle}"
CellContentFormat="{}{0:C}">
<telerik:DataGridNumericalColumn.AggregateDescriptors>
<telerik:PropertyAggregateDescriptor PropertyName="Price"
Function="Min"
Format="C"
Caption="Cheapest item: " />
<telerik:PropertyAggregateDescriptor PropertyName="Price"
Function="Max"
Format="C"
Caption="Priciest item: " />
</telerik:DataGridNumericalColumn.AggregateDescriptors>
</telerik:DataGridNumericalColumn>
<telerik:DataGridNumericalColumn PropertyName="DeliveryPrice"
FooterStyle="{StaticResource FooterStyle}"
HeaderText="Delivery Price"
CellContentFormat="{}{0:C}">
<telerik:DataGridNumericalColumn.AggregateDescriptors>
<telerik:PropertyAggregateDescriptor PropertyName="DeliveryPrice"
Function="Average"
Format="C"
Caption="Average: " />
</telerik:DataGridNumericalColumn.AggregateDescriptors>
</telerik:DataGridNumericalColumn>
<telerik:DataGridNumericalColumn PropertyName="Quantity"
FooterStyle="{StaticResource FooterStyle}">
<telerik:DataGridNumericalColumn.AggregateDescriptors>
<telerik:PropertyAggregateDescriptor PropertyName="Quantity"
Function="Sum"
Caption="Total amount: " />
</telerik:DataGridNumericalColumn.AggregateDescriptors>
</telerik:DataGridNumericalColumn>
</telerik:RadDataGrid.Columns>
</telerik:RadDataGrid>
The footer style is added per column.
The following image shows the end result.
For the DataGrid
GroupFooterstyling example refer to the SDKBrowser Demo application and navigate to the DataGrid > Aggregates category.