TextReader.ReadLineAsync Method

.NET Framework 4.5

Reads a line of characters asynchronously and returns the data as a string.

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

'Declaration
Public Overridable Function ReadLineAsync As Task(Of String)

Return Value

Type: System.Threading.Tasks.Task(Of String)
A task that represents the asynchronous read operation. The value of the TResult parameter contains the next line from the text reader, or is Nothing if all of the characters have been read.

ExceptionCondition
ArgumentOutOfRangeException

The number of characters in the next line is larger than MaxValue.

ObjectDisposedException

The text reader has been disposed.

InvalidOperationException

The reader is currently in use by a previous read operation.

The TextReader class is an abstract class. Therefore, you do not instantiate it in your code. For an example of using the ReadLineAsync method, see the StreamReader.ReadLineAsync method.

.NET Framework

Supported in: 4.6, 4.5

.NET for Windows Store apps

Supported in: Windows 8

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Was this page helpful?
(1500 characters remaining)
Thank you for your feedback
Show:
© 2014 Microsoft