Question

H,

How to Read First 512 Bytes of data from a .dat file in C# ?
My dat files contains binary data.
I am using File.ReadAllBytes currently to read data from the dat file.But it Reads all the data, i want to read only first 512 bytes then break.
I need to use for loop for this or any other approach.
Any help is appreciated.

Answer 1

You can try this:

byte[] buffer = new byte[512];
try
{
     using (FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read))
     {
          var bytes_read = fs.Read(buffer, 0, buffer.Length);
          fs.Close();

          if (bytes_read != buffer.Length)
          {
              // Couldn't read 512 bytes
          }
     }
}
catch (System.UnauthorizedAccessException ex)
{
     Debug.Print(ex.Message);
}