Occurs when new columns are about to be inserted into a worksheet.
The ColumnsInserting event's data class is ColumnsChangingEventArgs. The following properties provide information specific to this event:
|Cancel||Gets or sets a value indicating whether the event should be canceled. Inherited from CancelEventArgs.|
|Count||Gets the number of rows/columns that will be inserted or removed. Inherited from RowsColumnsChangingEventArgsBase.|
|StartIndex||Gets the index of the first row/column after which rows/columns will be inserted or removed. Inherited from RowsColumnsChangingEventArgsBase.|