DevExpress-Examples / wpf-spreadsheet-how-to-replace-standard-command-with-custom-command

Substitute the default command factory service with its descendant to create a custom command in place of the default command.

WPF Spreadsheet - How to replace a standard command with a custom Command

This example demonstrates how to modify the functionality of the existing SpreadsheetControl command used to clear the selected cell content. All commands in the SpreadsheetControl are created using the command factory service. You can substitute the default command factory service with its descendant to create a custom command in place of the default command.

Implementation Details

Follow the steps below.

1. Create a custom command class inherited from the command you wish to replace. In this example, it is DevExpress.XtraSpreadsheet.Commands.FormatClearContentsCommand. Override the ExecuteCore method to specify actions that the command should perform.
2. Create a class inherited from SpreadsheetCommandFactoryServiceWrapper to replace the default command service. In this class, override the CreateCommand method to substitute the default FormatClearContents and FormatClearContentsContextMenuItem commands with the newly created custom command.
3. Create a custom service instance and use the SpreadsheetControl.ReplaceService method to replace the default service with the custom one. Note that due to WPF Spreadsheet implementation specifics, it is necessary to replace the built-in service after the control is completely loaded.

Files to Review

CS	VB
MainWindow.xaml	MainWindow.xaml
MainWindow.xaml.cs	MainWindow.xaml.vb
CustomCommandService.cs	CustomCommandService.vb

Documentation

• How to: Replace Built-In Command with a Custom Command