# GenerateColumn Command

The `GenerateColumn` command provides a way to customize the logic for the automatic generation of grid columns. The default implementation will generate a `DataGridTextColumn` instance for each of the public properties in the underlying data item.

## Execution Parameter

The execution parameter is of type `GenerateColumnContext` and exposes the following properties:

* `Result`—Gets or sets the `DataGridColumn` instance that will be associated with the specified property. If no instance is provided (`null`), the current property will be skipped and no column will be associated with it.
* `PropertyName`—Gets the name of the property for which a column instance is needed.

## Custom GenerateColumn Command

The following examples show how to create a class that inherits from the `DataGridCommand` and add it to the `Commands` collection.

#### **Create a Custom GenerateColumn Command**

```C#
public class CustomGenerateColumnCommand : DataGridCommand
{
	public CustomGenerateColumnCommand()
	{
		this.Id = CommandId.GenerateColumn;
	}

	public override bool CanExecute(object parameter)
	{
		var context = parameter as GenerateColumnContext;
		// put your custom logic here
		return true;
	}

	public override void Execute(object parameter)
	{
		var context = parameter as GenerateColumnContext;
		// put your custom logic here

		this.Owner.CommandService.ExecuteDefaultCommand(CommandId.GenerateColumn, context);               
	}
}
```

#### **Add the Custom Command to the Commands Collection**

```XAML
<Grid xmlns:grid="using:Telerik.UI.Xaml.Controls.Grid">
	<grid:RadDataGrid Width="600" Height="460" x:Name="grid" Hold>
		<grid:RadDataGrid.Commands>
			<local:CustomGenerateColumnCommand/>
		</grid:RadDataGrid.Commands>
	</grid:RadDataGrid>
</Grid>
```

## See Also

* [CellTap](https://www.telerik.com/winui/documentation/controls/raddatagrid/commands/datagrid-celltapcommand)
* [CellDoubleTap](https://www.telerik.com/winui/documentation/controls/raddatagrid/commands/datagrid-celldoubletappedcommand)
* [FlyoutGroupHeader](https://www.telerik.com/winui/documentation/controls/raddatagrid/commands/datagrid-flyoutgroupheadertapcommand)
* [ColumnHeaderTap](https://www.telerik.com/winui/documentation/controls/raddatagrid/commands/datagrid-columnheadertapcommand)
* [FilterButtonTap](https://www.telerik.com/winui/documentation/controls/raddatagrid/commands/datagrid-filterbuttontapcommand)