SheetSelectorEntryEventArgs.LinkNeedsEscaping Property
If true (the default) the link you provide in Link is not escaped and will be escaped by FlexCel. So for example, the link "http://my site" will be escaped to "http://my%20site". If the link you provided was already escaped, then set this variable to false.
Syntax
Namespace: FlexCel.Render
public Boolean LinkNeedsEscaping { get; set; }