When all five fields for a record have been entered, the program will write a fixed-length record to the output file and start all over again with the prompts for the next record, beginning with the employee name. As the user enters each field, the program will check to make sure the data is valid (and if invalid, will show a message and re-prompt for that same field). In this example program, the user will be prompted to enter each field on the console, one-by-one (employee name, then department, job title, hire date, and hourly rate). In the text file, all fields will be represented as a string of characters.įor the fixed-length file, we want to write the records in the following format:Employee Name (last name first, 20 characters, space-filled on the right)Department Number (up to 4 digits, space-filled on the left)(unused – should contain blank spaces)Job Title (21 characters, space-filled on the right)Hire Date (month/day/year format, 10 characters, space-filled on the right)Hourly Rate (a value between 0 and 99.99, occupies 5 positions, space-filled on the left)
*Please note that the data types for these fields are the data types of the variables into which these fields will be stored.
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We will also see how to use the WriteLine function of the Microsoft.VisualBasic namespace to easily create a comma-delimited file that contains text fields enclosed in quotes we will also see how to use the PrintLine function of the MS.VB namespace to create a fixed-length file, noting the similarities and differences between that and the StreamWriter technique.Īs in the previous section, the file that will be used for all examples in this section is a simplified employee file, which consists of the following fields: In this tutorial we will see how to use the FileStream and StreamWriter classes of the System.IO namespace to write a text file in both fixed-length and pipe-delimited formats. We also saw how to use the Input function of the Microsoft.VisualBasic namespace to easily read a comma-delimited file that also contained fields enclosed in quotes. In another post (about Reading Text Files In VB.NET), we saw how to use the FileStream and StreamReader classes of the System.IO namespace to read a text file in both fixed-length and pipe-delimited formats. If you don’t know what this means or why you would choose one over the other please read on and it will make sense.
Below you will learn how to write to files using both a fixed format or a delaminated format. This is by far the most straight forward way to serialize data so that your VB program can later read it back in. This VB Tutorial will walk you through several different ways to easily save your data to a simple text file. VB.NET provides multiple ways to save program data out to a file.
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