Example Method for C to Read Large File Data Using FileStream Loop

This article illustrates how C # uses FileStream loop to read large file data. Share it for your reference, as follows:

Today, I learned the usage of FileStream, which is used to read the file stream. In the tutorial, I read small files once, but if I encounter large files, we need to read the files cyclically.

Go directly to the code.

Reference namespace

using System.IO;

The following is the code to read a large file in a loop

class Program
{
    static void Main(string[] args)
    {
      // Loop to read large text files 
      FileStream fsRead;
      // Get the file path 
      string filePath="C:\\Users\\ Guo Xing \\Desktop\\1 Number shop account number .txt";
      // Use FileStream File stream opens a file 
      try
      {
        fsRead = new FileStream(@filePath,FileMode.Open);
      }
      catch (Exception)
      {
        throw;
      }
      // Length of file content that has not been read yet 
      long leftLength = fsRead.Length;
      // Create a byte array to receive the contents of the file 
      byte[] buffer = new byte[1024];
      // Maximum number of bytes per read 
      int maxLength=buffer.Length;
      // The actual number of bytes returned each time 
      int num=0;
      // The location where the file begins to be read 
      int fileStart=0;
      while (leftLength>0)
      {
        // Set the read location of the file stream 
        fsRead.Position=fileStart;
        if (leftLength<maxLength)
        {
          num=fsRead.Read(buffer,0,Convert.ToInt32(leftLength));
        }
        else{
          num=fsRead.Read(buffer,0,maxLength);
        }
        if (num==0)
        {
          break;
        }
        fileStart += num;
        leftLength -= num;
        Console.WriteLine(Encoding.Default.GetString(buffer));
      }
      Console.WriteLine("end of line");
      fsRead.Close();
      Console.ReadKey();
    }
}

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I hope this article is helpful to everyone's C # programming.