Code: Writing Text to a File (Visual Basic)-.NET教程,VB.Net语言

this example writes a string to a text file using the writeline method of the streamwriter class.
example
dim file as new system.io.streamwriter(“c:\test.txt”)
file.writeline(“here is the first line.”)
file.close()
compiling the code
this example requires:
a reference to system namespace. robust programming
the following conditions may cause an exception:
the file exists and is read-only (ioexception class). the disk is full (ioexception class). the pathname is too long (pathtoolongexception class). security
this example creates a new file, if the file does not already exist. if an application needs to create a file, that application needs create access for the folder (see access control). if the file already exists, the application needs only write access, a lesser privilege. where possible, it is more secure to create the file during deployment, and only grant read access to a single file, rather than create access for a folder.