Hello,

This functionality is provided out of the box from the framework and can be used in the Grid component as well. You can add a custom command button to the Grid that will navigate to the respective Create/Edit View where data can be modified.

Navigation between different Vews is explained in detail in the Getting started section of the MSDN documentation. The section that shows a View for creating a record is shown in the Accessing your Mode's data from the Controller article.

Alternatively, you can consider using the built-in Popup editing mode for the Grid. When an item is being edited or created a popup with the relevant fields will be shown:

Grid popup editing example

Regards,
Viktor Tachev
Progress Telerik