The file is in use by another process or an I/O error occurs ( IOException).
The file does not exist ( FileNotFoundException). The path is not valid because it is Nothing ( ArgumentNullException). 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 following conditions may cause an exception: Dim fileReader As StringįileReader = My.("C:\test.txt", The following example reads the contents of the UTF32 file test.txt into a string and then displays it in a message box.
Use the ReadAllText method of the My.Computer.FileSystem object to read the contents of a text file into a string, supplying the path and file encoding type. Dim fileReader As StringįileReader = My.("C:\test.txt") The following example reads the contents of test.txt into a string and then displays it in a message box. Use the ReadAllText method of the My.Computer.FileSystem object to read the contents of a text file into a string, supplying the path. You can test for the end of the file using the EndOfStream method of the StreamReader object. You can use the ReadLine method of the StreamReader object to read a file one line at a time. The OpenTextFileReader method returns a StreamReader object. To read a file a single line of text at a time, use the OpenTextFileReader method of the My.Computer.FileSystem object.
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