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TextReader.ReadBlock Method

Reads a maximum of count characters from the current stream, and writes the data to buffer, beginning at index.

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

public virtual int ReadBlock(
	char[] buffer,
	int index,
	int count
)

Parameters

buffer
Type: System.Char[]

When this method returns, this parameter contains the specified character array with the values between index and (index + count -1) replaced by the characters read from the current source.

index
Type: System.Int32

The position in buffer at which to begin writing.

count
Type: System.Int32

The maximum number of characters to read.

Return Value

Type: System.Int32
The position of the underlying stream is advanced by the number of characters that were read into buffer.
The number of characters that have been read. The number will be less than or equal to count, depending on whether all input characters have been read.

ExceptionCondition
ArgumentNullException

buffer is null.

ArgumentException

The buffer length minus index is less than count.

ArgumentOutOfRangeException

index or count is negative.

ObjectDisposedException

The TextReader is closed.

IOException

An I/O error occurs.

The method blocks until either count characters are read, or all characters have been read. This is a blocking version of Read.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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