Regarding this SQL Server Full text Search topic, I could save my files in binary data type and my problem was solved.
Now, after saving files in the database I have a new problem.
After searching, I need to find the location of the criteria (For example in which lines or which columns) and highlight those.
I suppose this is very important that we can find the location of the criteria text in files and show them to the users.
I appreciate any help.