How to customize the appearance of the DataGridComboBox in MAUI DataGrid?

This article demonstrates how to customize the appearance of the DataGridComboBox within a .NET MAUI DataGrid.

The .NET MAUI DataGrid (SfDataGrid) provides flexibility in customizing the appearance of the DataGridComboBox by overriding the DataGridComboBoxRenderer.

To achieve this customization, follow these steps:

• Create a class named CustomDataGridComboBoxRenderer that inherits from DataGridComboBoxRenderer.
• Inside the CustomDataGridComboBoxRenderer class, set the desired properties for the SfComboBox view within the OnInitializeEditView method.
• Register the custom DataGridComboBoxRenderer in the SfDataGrid.CellRenderers collection. This involves removing the existing entry with the corresponding key from the collection and adding a new entry with the same key, along with an instance of the custom renderer.

XAML:

<?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"
                        AutoGenerateColumnsMode="None"
                        ColumnWidthMode="Auto"
                        SelectionMode="Single"
                        AllowEditing="True"
                        ItemsSource="{Binding OrderInfoCollection}">
       <dataGrid:SfDataGrid.Columns>
           <dataGrid:DataGridTextColumn MappingName="OrderID" 
                                        HeaderText="Order ID"/>
           <dataGrid:DataGridTextColumn MappingName="CustomerID" 
                                        HeaderText="Customer ID"/>
           <dataGrid:DataGridComboBoxColumn MappingName="Customer" 
                                            HeaderText="Customer Name"
                                            HeaderTextAlignment="Start"
                                            Width="200"
                                            ItemsSource="{Binding CustomerNames}"/>
           <dataGrid:DataGridTextColumn MappingName="ShipCity" 
                                        HeaderText="Ship City"/>
           <dataGrid:DataGridTextColumn MappingName="ShipCountry" 
                                        HeaderText="Ship Country"/>
           <dataGrid:DataGridTextColumn MappingName="Price" 
                                        HeaderText="Total Price"/>
       </dataGrid:SfDataGrid.Columns>
   </dataGrid:SfDataGrid>
</ContentPage>

MainPage.xaml.cs

using Syncfusion.Maui.DataGrid;
using Syncfusion.Maui.Inputs;

namespace MauiApp1
{
   public partial class MainPage : ContentPage
   {
       public MainPage()
       {
           InitializeComponent();
           dataGrid.CellRenderers.Remove("ComboBox");
           dataGrid.CellRenderers.Add("ComboBox", new CustomDataGridComboBoxRenderer());
       }
   }

   public class CustomDataGridComboBoxRenderer : DataGridComboBoxRenderer
   {
       public override void OnInitializeEditView(DataColumnBase dataColumn, SfComboBox view)
       {
           base.OnInitializeEditView(dataColumn, view);

           view.ClearButtonIconColor = Colors.Red;
           view.DropDownIconColor = Colors.Purple;
           view.TextColor = Colors.DeepPink;
           view.Placeholder = "Select a value";
           view.PlaceholderColor = Colors.DarkMagenta;
           view.TextColor = Colors.DarkViolet;
       }
   }
}

Output

Download the complete sample from GitHub.

Note:
You can find more details of the SfComboBox UI customization in this UG document.

Conclusion

I hope you enjoyed learning how to customize the appearance of the DataGridComboBox in MAUI DataGrid (SfDataGrid).

You can refer to our .NET MAUI DataGrid feature tour page to learn about its other groundbreaking feature representations. Explore our documentation to understand how to present and manipulate data.

For current customers, check out our .NET MAUI components on the License and Downloads page. If you are new to Syncfusion®, try our 30-day free trial to explore our .NET MAUI DataGrid and other .NET MAUI components.

Please let us know in the comments section if you have any queries or require clarification. You can also contact us through our support forums, Direct-Trac, or feedback portal. We are always happy to assist you!