Compares the specified file1. This method accepts two strings the represent two files to compare. : File Command « File Stream « C# / C Sharp

1. C# / C Sharp
2. File Stream
3. File Command

Compares the specified file1. This method accepts two strings the represent two files to compare.

     
        

using System;
using System.Collections.Generic;
using System.Text;
using System.Security.AccessControl;
using System.IO;
using System.Security.Principal;

namespace Td.Additional.IO
{
    /// <summary>
    /// File facilities.
    /// </summary>
    public static class File
    {
        /// <summary>
        /// Compares the specified file1.
        /// This method accepts two strings the represent two files to 
        /// compare.
        /// </summary>
        /// <param name="file1">The file1.</param>
        /// <param name="file2">The file2.</param>
        /// <returns>True, if files are equal, otherwise false.</returns>
        private static bool Compare(string file1, string file2)
        {
            int file1byte;
            int file2byte;
            FileStream fs1;
            FileStream fs2;

            // Determine if the same file was referenced two times. 
            if (file1 == file2)
            {
                // Return true to indicate that the files are the same. 
                return true;
            }

            // Open the two files. 
            fs1 = new FileStream(file1, FileMode.Open);
            fs2 = new FileStream(file2, FileMode.Open);

            // Check the file sizes. If they are not the same, the files 
            // are not the same. 
            if (fs1.Length != fs2.Length)
            {
                // Close the file 
                fs1.Close();
                fs2.Close();

                // Return false to indicate files are different 
                return false;
            }

            // Read and compare a byte from each file until either a 
            // non-matching set of bytes is found or until the end of 
            // file1 is reached. 
            do
            {
                // Read one byte from each file. 
                file1byte = fs1.ReadByte();
                file2byte = fs2.ReadByte();
            }
            while ((file1byte == file2byte) && (file1byte != -1));

            // Close the files. 
            fs1.Close();
            fs2.Close();

            // Return the success of the comparison. "file1byte" is 
            // equal to "file2byte" at this point only if the files are 
            // the same. 
            return ((file1byte - file2byte) == 0);
        }

    }
}

   
    
    
    
    
  

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