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Is it possible to read a large binary file from a particular position?
I don't want to read the file from the beginning because I can calculate the start position and the length of the stream I need.
685
Use the fread Function to Read Binary File in C FILE* streams are retrieved by the fopen function, which takes the file path as the string constant and the mode to open them. The mode of the file specifies whether to open a file for reading, writing or appending.
Binary files are not human readable and require a special program or hardware processor that knows how to read the data inside the file. Only then can the instructions encoded in the binary content be understood and properly processed.
Read, write and seek operations can be performed on binary files with the help of fread(), fwrite() and fseek() functions, respectively. After reading or writing a structure, the file pointer is moved to the next structure. The fseek() function can move the pointer to the position as requested.
Binary fileIt contains 1's and 0's, which are easily understood by computers. The error in a binary file corrupts the file and is not easy to detect. In binary file, the integer value 1245 will occupy 2 bytes in memory and in file. A binary file always needs a matching software to read or write it.
using (FileStream sr = File.OpenRead("someFile.dat"))
{
sr.Seek(100, SeekOrigin.Begin);
int read = sr.ReadByte();
//...
}
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