.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 RadDataGrid CellTap command works:
1. Create the needed business objects, for example, type Country with the following properties:
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:
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:
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:
grid.Commands.Add(new CellTapUserCommand());
5. Define the DataGrid in XAML:
<telerik:RadDataGrid x:Name="grid" ItemsSource="{Binding}"/>
6. Add the telerik namespace:
xmlns:telerik="http://schemas.telerik.com/2022/xaml/maui"