How to check spelling in Hunspell with case insensitive

Question

Hi I am making a desktop application (C#) that checks the spelling of the inputted word. I am using Hunspell which I added to my project using NuGet. I have 2 files the aff file and the dic file.

using (Hunspell english = new Hunspell("en_US.aff", "en_US.dic"))
{
    bool isExist = english.Spell("THesis");
}

isExist is equal to false because in my .dic file the correct spelling is "thesis". Even I use to .lower() and input proper names the isExist become false.

Can you help me in solving this?

Answer 1

Given that Hunspell does not appear to support case-insensitive spelling checks, you might want to consider adapting your algorithm slightly:

Given THesis, you could try:

bool isExist = false;

using (Hunspell english = new Hunspell("en_US.aff", "en_US.dic"))
{
    TextInfo textInfo = new CultureInfo("en-US",false).TextInfo;
    isExist =      english.Spell("THesis") 
                 | english.Spell(textInfo.ToLower("THesis") 
                 | english.Spell(textInfo.ToUpper("THesis")) 
                 | english.Spell(textInfo.ToTitleCase("THesis"))
}

This will in turn logically check "THesis", "thesis", "THESIS" and "Thesis" and return true if any of those spellings is valid, courtesy of the logical OR operator.

Similarly for canada, this would work, as the ToTitleCase() method would at least guarantee a match.

This should work for most single words (including all caps acronyms).