GridChildLoadMode

This mode is similar to ServerBind, but items are expanded client-side, using JavaScript manipulations, instead of postback to the server.

In order to use client-side hierarchy expand, you will need to set also AllowExpandCollapse to true.

Once expanded with postback the item can be expanded and collapsed on the client without additional postback, until the next rebinding of the control

All child GridTableViews will be bound immediately when DataBind occurs for a parent GridTableView or RadGrid.

DataBind of a child GridTableView would only take place when an item is Expanded Expanded. This is the default value of HierarchyLoadMode