TextReader.ReadBlock Method
Reads a specified maximum number of characters from the current text reader and writes the data to a buffer, beginning at the specified index.
Assembly: mscorlib (in mscorlib.dll)
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.Int32The 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.
| Exception | Condition |
|---|---|
| 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 position of the underlying text reader is advanced by the number of characters that were read into buffer.
The method blocks until either count characters are read, or all characters have been read. This is a blocking version of Read.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
