OCR stands for Optical Character Recognition,
This Technology will help you to extract 'TEXT' data from image file and store it to Text File(*.txt) or Rich Text Format(*.rtf).
U Can read Text File or Rich Text Format file using
string  allLines = File.Read("DestinationFilePath");
Once you got text data from file, here lets consider you have read Tender Form. Now just Write Sql Insert query.
SqlCommand cmd=new SqlCommand ("insert into tablename values('alllines')",Connection)
Please not that OCR cant read Formated Text
or Underlined Text
or Table Content
. So, keep simple text as much as you can.