Using the FileSystemObject to Read Text Files In the, we discussed that the general purpose of the FileSystemObject (FSO) is to allow access to the host computer's file system. One common function when dealing with a computer's file system, is reading the contents of a file. FSO provides a TextStream object that is useful for reading and writing the contents of a text file. In this FAQ, we will discuss how to use the TextStream object to read the contents of a file. When using the TextStream object or other FSO objects, you need to first declare an instance of the FileSystemObject. For our script, let's start by creating an instance of the FileSystemObject: 'Create an instance of the FileSystemObject object Dim objFSO Set objFSO = Server.CreateObject('Scripting.FileSystemObject') Before we open a file, we should always test to make sure it exists. The FileSystemObject provides a useful function to determine whether or not a file exists, aptly named FileExists.

The syntax for FileExists is: FileSystemObjectInstance.FileExists( FullFilePath) So, in this example, we want to output the contents of the text file D: scott resume.txt. Before we open our file, we will make sure that it exists. Earlier I mentioned that the TextStream object is responsible for reading and writing to the contents of a text file. A TextStream object instance is used to iterate through the contents of a particular text file. Family Handyman Pdf. So, before we can use a TextStream, we must inform the TextStream object instance what text file we are interested in. This is accomplished using the FileSystemObject's OpenTextFile method.

The OpenTextFile method has the following syntax: FileSystemObjectInstance.OpenTextFile( FullFilePath[, iomode]) Note: there are two more parameters, but we are only interested in these first two for the time being. If you are interested in the full specifications,. The optional iomode parameter decides what IO mode the file is opened with. The following values can be used: iomode Values ForReading 1 ForWriting 2 ForAppending 8 These constants are not defined in a text file like the ADO constants are defined in. Therefore, you should define the constant you wish to use.

For example, if I use the ForReading constant, you will see ASP code like: Const fsoForReading = 1 The OpenTextFile method returns a TextStream object instance. So, to set a variable to a TextStream object instance for reading the contents of a particular file, you would use the following syntax: 'Assumes a FileSystemObject instance named objFSO exists Const fsoForReading = 1 Dim objTextStream Set objTextStream = objFSO.OpenTextFile('C: SomeFile.txt', fsoForReading) The TextStream object has the following important methods for reading text files: • Read( characters) - Reads a specified number of characters from the text file, returning a resulting string. • ReadLine - Reads an entire line up to, but not including, the new line character. The results are returned as a string. • ReadAll - Reads the entire contents of the file, returning the results as a string. Finally, the TextStream object has a Close method, which should be used when you have finished reading from the file.