Sets the current selection to the specified range of cells.
void SetSelectedRange(CellIndex start, int columnCount, int rowCount)
The index of the cell from which the selection should start.
The number of columns in the selection.
The number of rows in the selection.
This method clears the current selection and selects the specified range of cells. Note that if the ITreeDataGridSource is currently sorted then the resulting selection may not be contiguous in the data source.