Read file in vb.net

FileSystem object allows you to read from a text file. 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.

If you are running in a partial-trust context, the code might throw an exception due to insufficient privileges. For more information, see Code Access Security Basics. The user also needs access to the file. Skip to main content. This browser is no longer supported. 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. The path exceeds the system-defined maximum length PathTooLongException. A file or directory name in the path contains a colon : or is in an invalid format NotSupportedException. There is not enough memory to write the string to buffer OutOfMemoryException. The user lacks necessary permissions to view the path SecurityException.

The StreamReader and StreamWriter classes help to accomplish it. Reading from and Writing into Binary files. It involves reading from and writing into binary files. The BinaryReader and BinaryWriter classes help to accomplish this. Manipulating the Windows file system. Frahaan Hussain. Arnold Higuit. Net - File Handling Advertisements. Previous Page. Next Page.