ReadLine Method
Collapse the table of content
Expand the table of content

StringReader.ReadLine Method

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Reads a line from the underlying string.

Namespace:  System.IO
Assembly:  mscorlib (in mscorlib.dll)

'Declaration
Public Overrides Function ReadLine As String

Return Value

Type: System.String
The next line from the underlying string, or Nothing if the end of the underlying string is reached.

ExceptionCondition
ObjectDisposedException

The current reader is closed.

OutOfMemoryException

There is insufficient memory to allocate a buffer for the returned string.

This method overrides the TextReader.ReadLine method.

A line is defined as a sequence of characters followed by a line feed ("\n"), a carriage return ("\r"), or a carriage return immediately followed by a line feed ("\r\n"). The resulting string does not contain the terminating carriage return and/or line feed. The returned value is Nothing if the end of the underlying string has been reached.

If the current method throws an OutOfMemoryException, the reader's position in the underlying string is advanced by the number of characters the method was able to read, and the characters already read into the internal ReadLine buffer are discarded. Since the position of the reader in the string cannot be changed, the characters already read are unrecoverable, and can be accessed only by reinitializing the StringReader. To avoid such a situation and produce robust code you should use the Read method and store the read characters in a preallocated buffer.

Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

Show:
© 2017 Microsoft