[Devexpress Asp.net] How to easily create a simple master detail relationship between two tables

This demo illustrates how to easily create a simple master-detail relationship between two tables.
To get started, do the following:
Create two ASPxGridView controls
Bind the first grid (the master grid) to the master data source and enable its
SettingsDetail.ShowDetailRow option.
Bind the second grid (the detail grid) to the detail data source.
Create the DetailRow template for the master grid and place the detail grid onto it.
Finally, handle the detail grid's BeforePerformDataSelect event and specify session values.

[sirjomz]

I was added a Batch mode .. Then there was an error