Random File Access
The bytes in random-access files form records of uniform length, each containing one or more fields. A record with one field corresponds to any standard type, such as an integer or fixed-length string. A record with more than one field corresponds to a user-defined type.
In this section you declare, open, edit, and write to a random-access file, using a hypothetical Employee Records database as an example. Each file-access aspect of the example is discussed separately in the topics listed immediately below.
In This Section
- Declaring Variables for Random File Access
- Discusses creating variables and user-defined types for random access.
- Opening Files for Random Access
- Explains how to use the FileOpen statement to work on existing files.
- Editing Files Opened for Random Access
- Explains how to move records from a random file into variables.
- Writing Variables to Records
- Covers how to write variables back to records after editing their values.