ColumnView.LoadRowHierarchy(Int32, OperationCompleted) Method
Loads the specified data row’s parent group rows (if they are not already loaded) in Instant Feedback Mode.
NuGet Package: DevExpress.Win.Grid
public virtual void LoadRowHierarchy( int rowHandle, OperationCompleted completed )
Public Overridable Sub LoadRowHierarchy( rowHandle As Integer, completed As OperationCompleted )
An integer value that is the row handle of the data row whose parent group rows need to be loaded.
A DevExpress.Data.OperationCompleted method that will be called when the requested rows have been loaded. The method’s argument will be a Boolean value that specifies whether the load operation was success.
In Instant Feedback Mode, rows are loaded on demand in a background thread. The LoadRowHierarchy method ensures that the specified data row’s parent group rows are loaded and calls your callback, specified by the completed parameter, after the rows have been loaded. If the specified rows are already loaded, your callback will be called immediately.