ExcelFile.AllowEnteringEmptyStrings Property
By default, FlexCel won't allow you to enter empty or null strings into a cell; it will create a blank record instead. If for any reason you need to enter actual empty strings (which might be confusing to the Excel user) set this property to true.
Syntax
Namespace: FlexCel.Core
public abstract Boolean AllowEnteringEmptyStrings { get; set; }