Query on creating datatype

Hi Gurujis,

I had a input file seperated by comma with around 30 fields.

How I will create the datatype based on this information in IR?

Even,If if I create,will this will be read by file adapter?

Kindly suggest how I will build datatype with this info?

appreciate if I get links with somescreenshots and the type of adapter to be used.

Regards,

AlexFleming.