C# FileStream.Read Method【C#.Net教程】,C#,FileStream.Read,Method

Reads a block of bytes from the stream and writes the data in a given buffer.

public override int Read(
	byte[] array,
	int offset,
	int count
)

Parameters

array
Type:聽System.Byte[]
When this method returns, contains the specified byte array with the values between聽offset聽and (offset聽+聽count聽- 1)聽replaced by the bytes read from the current source.

offset
Type:聽System.Int32
The byte offset in聽array聽at which the read bytes will be placed.

count
Type:聽System.Int32
The maximum number of bytes to read.

Return Value

Type:聽System.Int32
The total number of bytes read into the buffer. This might be less than the number of bytes requested if that number of bytes are not currently available, or zero if the end of the stream is reached.

Exceptions

Exception	Condition
ArgumentNullException	array聽is聽null.
ArgumentOutOfRangeException	offset聽or聽count聽is negative.
NotSupportedException	The stream does not support reading.
IOException	An I/O error occurred.
ArgumentException	offset聽and聽count聽describe an invalid range in聽array.
ObjectDisposedException	Methods were called after the stream was closed.