windows service,file wather,msmq

Requirement,

Client will put the file in shared folder for order creation,the file will be as xml file which contains
multiple order(100 + order).everyday we will get the multiple files for order.

we have to read the xml file ,fetch the order and according to order send mail to user.
i am trying to do it with windows service,to read the xml file and send mail to user.

issue :1. like in middle file reading and sending mail,if error comes than
 how we could know that how many successful record we have send via mail?suppose that
 i am having 100 records in 1 order file after reading 50 record errro comes
then could we know that from which record we need to send email to user(how do i excecute file again).

2.after completion of successful read moved that file to Archive folder.I am ok with that i can do it.

some solution which i know as below.
1.take one database,insert data to it from flat file than process record from database with some successful flag,but client is not providing
a database.
2.some one told that use file watcher and msmq,i dont know how to use both things in windows service to implement it.i have not worked on msmq.


overall requirement

xmlfile---->read data from windows service will execute in 5 min ----send mail to user

problem: if error comes in middle of that how we take the latest record from xml file?

could you please provide the better approaches for this requirement?code/Article ?it will help to
to make some small poc before execution
nicemanishAsked:
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Aaron JabamaniTechnical ArchitectCommented:
Once the file watcher tries, open the xml file and start reading one order at a time and try to process it. If it is success send a success mail or failure email and continue reading the order. Why you need msmq or db for this ?
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nicemanishAuthor Commented:
good
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