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Is there any way to read specific bytes from a file?
For example, I have the following code to read all the bytes of the file:
byte[] test = File.ReadAllBytes(file); I want to read the bytes from offset 50 to offset 60 and put them in an array.
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It's simple mathematics: index = (pos*2) with base pos = 1. So first byte is pos=1 and hence index=2 in a zero-based array. ... and then take 10*2 digits to get the 10 bytes. You could use a bit mask to AND the bit shifted value to only get the bits you need.
Description. Python file method seek() sets the file's current position at the offset. The whence argument is optional and defaults to 0, which means absolute file positioning, other values are 1 which means seek relative to the current position and 2 means seek relative to the file's end. There is no return value.
To open a file in binary format, add 'b' to the mode parameter. Hence the "rb" mode opens the file in binary format for reading, while the "wb" mode opens the file in binary format for writing. Unlike text files, binary files are not human-readable. When opened using any text editor, the data is unrecognizable.
Python File read() Method The read() method returns the specified number of bytes from the file. Default is -1 which means the whole file.
Create a BinaryReader, read 10 bytes starting at byte 50:
byte[] test = new byte[10]; using (BinaryReader reader = new BinaryReader(new FileStream(file, FileMode.Open))) { reader.BaseStream.Seek(50, SeekOrigin.Begin); reader.Read(test, 0, 10); } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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