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