How to open a text file in vb

With the StreamWriter object, you can then write to the file. The following code demonstrates how to create a text file: Dim oFile as System. File Dim oWrite as System. StreamReader object. With the StreamReader object, you can then read the file. File Dim oRead as System. StreamWriter class for writing to the text file are Write and WriteLine.

The difference between these methods is that the WriteLine method appends a newline character at the end of the line while the Write method does not. Both of these methods are overloaded to write various data types and to write formatted text to the file. The following example demonstrates how to use the WriteLine method: oWrite.

The ability to format the output has been significantly improved over previous versions of Visual Basic. There are several overloaded methods for producing formatted text.

Close The overloaded method used in these examples accepts a string to be formatted and then a parameter array of values to be used in the formatted string. The first line writes a header for our report. Each curly brace set consists of two numbers.

The first number is the index of the item to be displayed in the parameter array. Notice that the parameter array is zero based. The second number represents the size of the field in which the parameter will be printed.

Alignment of the field can also be defined; positive values are left aligned and negative values are right aligned.

The second line demonstrates how to format values of various data types. The second field will output the current time formatted as PM. The third field will format the value So if the local machine were set for U. If you are reading from a file with extended characters, you will need to specify the file encoding.

FileSystem object. You can use the ReadLine method of the StreamReader object to read a file one line at a time. Use the ReadAllText method of the My. FileSystem object to read the contents of a text file into a string, supplying the path.

The following example reads the contents of test. FileSystem object to read the contents of a text file into a string, supplying the path and file encoding type. The following example reads the contents of the UTF32 file test. The path is not valid for one of the following reasons: it is a zero-length string, it contains only white space, it contains invalid characters, or it is a device path ArgumentException.

The path is not valid because it is Nothing ArgumentNullException. The file does not exist FileNotFoundException. Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services. Privacy policy. Opens a specified file and returns a TextStream object that can be used to read from, write to, or append to the file.

OpenTextFile filename , [ iomode , [ create , [ format ]]]. The following code illustrates the use of the OpenTextFile method to open a file for appending text:. Have questions or feedback about Office VBA or this documentation? Please see Office VBA support and feedback for guidance about the ways you can receive support and provide feedback. Skip to main content.