Článek
11/18/2011

TextReader.Read Method (array<Char[], Int32, Int32)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

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)

Syntax

'Declaration
Public Overridable Function Read ( _
    <OutAttribute> buffer As Char(), _
    index As Integer, _
    count As Integer _
) As Integer

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

Parameters

buffer
Type: array<System.Char[]
When this method returns, 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 place in buffer at which to begin writing.

count
Type: System.Int32
The maximum number of characters to read. If the end of the stream is reached before count of characters is read into buffer, the current method returns.

Return Value

Type: System.Int32
The number of characters that have been read. The number will be less than or equal to count, depending on whether the data is available within the stream. This method returns zero if called when no more characters are left to read.

Exceptions

Exception	Condition
ArgumentNullException	buffer is nulla null reference (Nothing in Visual Basic).
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.

Remarks

This method returns after either count characters are read or the end of the file is reached. ReadBlock is a blocking version of this method.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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