.NET MAUI DataGrid CellTap Command

The DataGrid CellTap command handles the tap (click) gesture over a grid cell, that is, the intersection of a data row and a column.

Example

Here is an example how the .NET MAUI DataGrid CellTap command works:

1. Create the needed business objects, for example, type Country with the following properties:

• C#

public class Country
{
    public Country(string name, double population)
    {
        this.Name = name;
        this.Population = population;
    }

    public string Name { get; set; }
    public double Population { get; set; }
}

2. Add data to the DataGrid ItemsSource and set the BindingContext:

• C#

var source = new ObservableCollection<Country>();
source.Add(new Country("Mozambique", 24692000));
source.Add(new Country("Paraguay", 6725000));
source.Add(new Country("Turkmenistan", 5663000));
source.Add(new Country("Mongolia", 3027000));
source.Add(new Country("Japan", 127000000));
source.Add(new Country("Bulgaria", 7128000));
source.Add(new Country("Chad", 14450000));
source.Add(new Country("Netherlands", 17020000));

this.BindingContext = source;

3. Handle the CellTap action as a command. First, create a class that inherits from the DataGridCommand and set its Id property. You will also need to override the CanExecute and Execute methods as demonstrated in the example below:

• C#

public class CellTapUserCommand : DataGridCommand
{
    public CellTapUserCommand()
    {
        Id = DataGridCommandId.CellTap;
    }
    public override bool CanExecute(object parameter)
    {
        return true;
    }
    public override void Execute(object parameter)
    {
        var context = parameter as DataGridCellInfo;
        var cellTap =  $"You tapped on {context.Value} inside {context.Column.HeaderText} column \n";
        Application.Current.MainPage.DisplayAlert("CellTap Command: ", cellTap, "OK");
        this.Owner.CommandService.ExecuteDefaultCommand(DataGridCommandId.CellTap, parameter);
    }
}

4. Add this command to the Commands collection of the RadDataGrid instance:

• C#

grid.Commands.Add(new CellTapUserCommand());

5. Define the DataGrid in XAML:

• XAML

<telerik:RadDataGrid x:Name="grid" ItemsSource="{Binding}"/>

6. Add the telerik namespace:

• XAML

xmlns:telerik="http://schemas.telerik.com/2022/xaml/maui"