Reads a line of characters from the current string and returns the data as a string.
Assembly: mscorlib (in mscorlib.dll)
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 string that is returned does not contain the terminating carriage return or line feed. The returned value is Nothing if the end of the 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, but the characters already read into the internal buffer are discarded. Because 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, use the Read method and store the read characters in a preallocated buffer.
The following table lists examples of other typical or related I/O tasks.
To do this...
See the example in this topic...
Create a text file.
Write to a text file.
Read from a text file.
Append text to a file.
Get the size of a file.
Get the attributes of a file.
Set the attributes of a file.
Determine if a file exists.
Read from a binary file.
Write to a binary file.
This code example is part of a larger example provided for the StringReader class.
' From textReaderText, create a continuous paragraph ' with two spaces between each sentence. Dim aLine, aParagraph As String Dim strReader As New StringReader(textReaderText) While True aLine = strReader.ReadLine() If aLine Is Nothing Then aParagraph = aParagraph & vbCrLf Exit While Else aParagraph = aParagraph & aLine & " " End If End While Console.WriteLine("Modified text:" & vbCrLf & vbCrLf & _ aParagraph)
.NET FrameworkSupported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
.NET Framework Client ProfileSupported in: 4, 3.5 SP1
XNA FrameworkSupported in: 3.0, 2.0, 1.0
Portable Class LibrarySupported in: Portable Class Library
Supported in: Windows Phone 8.1
Supported in: Windows Phone Silverlight 8.1
Supported in: Windows Phone Silverlight 8