1.StreamReader的read()
StreamReader的read()把Stream读入到char[]中。
public override int Read(char[] buffer,int index,int count)
buffer
Type: 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 是目标数组的偏移量
Type: System.Int32
The index of buffer at which to begin writing.
count
Type: System.Int32
The maximum number of characters to read.
Return Value
Type: System.Int32
The number of characters that have been read, or 0 if at the end of the stream and no data was read. The number will be less than or equal to the count
parameter, depending on whether the data is available within the stream.
2.FileStream的read()
FileStream的read()把Stream读入到byte[]数组中
public override int Read(byte[] array,int offset,int count)
array
Type: System.Byte[]
When this method returns, contains the specified byte array with the values between offset and (offset + count - 1) replaced by the bytes read from the current
source.
offset 是目标数组的偏移量
Type: System.Int32
The byte offset in array at which the read bytes will be placed.
count
Type: System.Int32
The maximum number of bytes to read.
Return Value
Type: 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.
小结：基本相似，但是目标数组的类型不同，一个为char[],一个为byte[]。