How-to-apply-SelectedRowTextColor-to-the-cells-of-a-DataGridTemplateColumn-in-MAUI-DataGrid

As per the current implementation of the MAUI SfDataGrid, the SelectedRowTextColor would not apply to the cells of DataGridTemplateColumn. This article illustrates how to apply SelectedRowTextColor for DataGridTemplateColumn cells in a .NET MAUI DataGrid.

• Initialize the SfDataGrid with the required properties, such as ItemsSource, SelectedRowTextColor in the SfDataGrid.DefaultStyle, and use DataGridTemplateColumn for the required columns.

• Write a custom renderer class that extends from the DataGridCellTemplateRenderer class. In the overridden OnSetCellStyle method, check if the respective row is present in DataGrid.SelectedRows. If it is, set the SelectedRowTextColor for the content of the DataGridTemplateColumn cell; otherwise, set the RowTextColor to the text color of the content.

• To register the custom cell template renderer with the SfDataGrid.CellRenderers collection, remove the existing entry by its key and then add a new entry with the same key, along with an instance of the custom renderer.

XMAL

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
            xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
            xmlns:local="clr-namespace:MauiApp1"
            xmlns:dataGrid="clr-namespace:Syncfusion.Maui.DataGrid;assembly=Syncfusion.Maui.DataGrid"
            x:Class="MauiApp1.MainPage">
   <ContentPage.BindingContext>
       <local:OrderInfoRepository x:Name="viewModel"/>
   </ContentPage.BindingContext>

   <dataGrid:SfDataGrid x:Name="dataGrid"
                        ItemsSource="{Binding OrderInfoCollection}" 
                        SelectionMode="Single"
                        ColumnWidthMode="Auto">
       <dataGrid:SfDataGrid.DefaultStyle>
           <dataGrid:DataGridStyle SelectedRowTextColor="Red">
           </dataGrid:DataGridStyle>
       </dataGrid:SfDataGrid.DefaultStyle>
       <dataGrid:SfDataGrid.Columns>
           <dataGrid:DataGridTemplateColumn HeaderText="Order ID" MappingName="OrderID">
               <dataGrid:DataGridTemplateColumn.CellTemplate>
                   <DataTemplate>
                       <Label Text="{Binding OrderID}"/>
                   </DataTemplate>
               </dataGrid:DataGridTemplateColumn.CellTemplate>
           </dataGrid:DataGridTemplateColumn>
       </dataGrid:SfDataGrid.Columns>
   </dataGrid:SfDataGrid>
</ContentPage>

MainPage.xaml.cs

namespace MauiApp1
{

   public partial class MainPage : ContentPage
   {

       public MainPage()
       {
           InitializeComponent();
           dataGrid.CellRenderers.Remove("Template");
           dataGrid.CellRenderers.Add("Template", new CustomDataGridCellTemplateRenderer());

       }
   }

   public class CustomDataGridCellTemplateRenderer : DataGridCellTemplateRenderer
   {
       protected override void OnSetCellStyle(DataColumnBase dataColumn)
       {
           base.OnSetCellStyle(dataColumn);

           if (dataColumn?.DataGridColumn != null)
           {
               var gridStyle = this.DataGrid?.DefaultStyle;
               DataGridCell gridCell = dataColumn.ColumnElement as DataGridCell;

               if (this.DataGrid.SelectedRows.Any(row => row == dataColumn.RowData))
               {
                   gridCell.TextColor = gridStyle?.SelectedRowTextColor;
                   Label sfLabel = dataColumn.ColumnElement?.Content as Label;
                   if (sfLabel != null)
                   {
                       sfLabel.TextColor = gridStyle?.SelectedRowTextColor;
                   }
               }
               else
               {
                   gridCell.TextColor = gridStyle?.RowTextColor;
                   Label sfLabel = dataColumn.ColumnElement?.Content as Label;
                   if (sfLabel != null)
                   {
                       sfLabel.TextColor = gridStyle?.RowTextColor;
                   }
               }
           }
       }
   }
}