Implements a TextReader that reads from a string.
Assembly: mscorlib (in mscorlib.dll)
Thetype exposes the following members.
|Close||Closes the . (Overrides TextReader.Close.)|
|CreateObjRef||Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. (Inherited from MarshalByRefObject.)|
|Dispose||Releases all resources used by the TextReader object. (Inherited from TextReader.)|
|Dispose(Boolean)||Releases the unmanaged resources used by the and optionally releases the managed resources. (Overrides TextReader.Dispose(Boolean).)|
|Equals(Object)||Determines whether the specified Object is equal to the current Object. (Inherited from Object.)|
|Finalize||Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)|
|GetHashCode||Serves as a hash function for a particular type. (Inherited from Object.)|
|GetLifetimeService||Retrieves the current lifetime service object that controls the lifetime policy for this instance. (Inherited from MarshalByRefObject.)|
|GetType||Gets the Type of the current instance. (Inherited from Object.)|
|InitializeLifetimeService||Obtains a lifetime service object to control the lifetime policy for this instance. (Inherited from MarshalByRefObject.)|
|MemberwiseClone||Creates a shallow copy of the current Object. (Inherited from Object.)|
|MemberwiseClone(Boolean)||Creates a shallow copy of the current MarshalByRefObject object. (Inherited from MarshalByRefObject.)|
|Peek||Returns the next available character but does not consume it. (Overrides TextReader.Peek.)|
|Read||Reads the next character from the input string and advances the character position by one character. (Overrides TextReader.Read.)|
|Read(Char(), Int32, Int32)||Reads a block of characters from the input string and advances the character position by count. (Overrides TextReader.Read(Char(), Int32, Int32).)|
|ReadBlock||Reads a maximum of count characters from the current stream, and writes the data to buffer, beginning at index. (Inherited from TextReader.)|
|ReadLine||Reads a line from the underlying string. (Overrides TextReader.ReadLine.)|
|ReadToEnd||Reads the stream as a string, either in its entirety or from the current position to the end of the stream. (Overrides TextReader.ReadToEnd.)|
|ToString||Returns a string that represents the current object. (Inherited from Object.)|
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.
The following code example demonstrates the creation of a continuous paragraph from a group of double-spaced sentences, and then the conversion of the paragraph back to the original text.
Option Explicit Option Strict Imports Microsoft.VisualBasic Imports System Imports System.IO Public Class StrReader Shared Sub Main() Dim textReaderText As String = "TextReader is the " & _ "abstract base class of StreamReader and " & _ "StringReader, which read characters from streams " & _ "and strings, respectively." & _ vbCrLf & vbCrLf & _ "Create an instance of TextReader to open a text " & _ "file for reading a specified range of characters, " & _ "or to create a reader based on an existing stream." & _ vbCrLf & vbCrLf & _ "You can also use an instance of TextReader to read " & _ "text from a custom backing store using the same " & _ "APIs you would use for a string or a stream." & _ vbCrLf & vbCrLf Console.WriteLine("Original text:" & vbCrLf & vbCrLf & _ textReaderText) ' 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) ' Re-create textReaderText from aParagraph. Dim intCharacter As Integer Dim convertedCharacter As Char Dim strWriter As New StringWriter() strReader = New StringReader(aParagraph) While True intCharacter = strReader.Read() ' Check for the end of the string ' before converting to a character. If intCharacter = -1 Then Exit While End If convertedCharacter = Convert.ToChar(intCharacter) If convertedCharacter = "."C Then strWriter.Write("." & vbCrLf & vbCrLf) ' Bypass the spaces between sentences. strReader.Read() strReader.Read() Else strWriter.Write(convertedCharacter) End If End While Console.WriteLine(vbCrLf & "Original text:" & vbCrLf & _ vbCrLf & strWriter.ToString()) End Sub End Class
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.