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StreamWriter.Write Method (Char(), Int32, Int32)

Writes a subarray of characters to the stream.

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

Public Overrides Sub Write ( _
	buffer As Char(), _
	index As Integer, _
	count As Integer _


Type: System.Char()

A character array that contains the data to write.

Type: System.Int32

The character position in the buffer at which to start reading data.

Type: System.Int32

The maximum number of characters to write.


buffer is Nothing.


The buffer length minus index is less than count.


index or count is negative.


An I/O error occurs.


AutoFlush is true or the StreamWriter buffer is full, and current writer is closed.


AutoFlush is true or the StreamWriter buffer is full, and the contents of the buffer cannot be written to the underlying fixed size stream because the StreamWriter is at the end the stream.

This method overrides TextWriter.Write.

The characters are read from buffer beginning at index and continuing through index + (count - 1). All characters are written to the underlying stream unless the end of the underlying stream is reached prematurely. Flush is invoked automatically if AutoFlush is true.

For a list of common I/O tasks, see Common I/O Tasks.

This example writes eight characters from a 13-element array to a file, beginning at the third element of the array.

Imports System
Imports System.IO

Public Class SWBuff

    Public Shared Sub Main()
        Dim sb As New FileStream("MyFile.txt", FileMode.OpenOrCreate)
        Dim b As Char() = {"a"c, "b"c, "c"c, "d"c, "e"c, "f"c, "g"c, _
           "h"c, "i"c, "j"c, "k"c, "l"c, "m"c}
        Dim sw As New StreamWriter(sb)
        sw.Write(b, 3, 8)
    End Sub 
End Class

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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