Copying and skipping files

[jumboora]

Hi, I want to read source directory and copy each file to the destination by skipping after each file based on interval value i.e., if i set the value of interval 2, then it should skip two files everytime.

For Example: If there are 5 files in a directory, 1.txt, 2.txt, 3.txt, 4.txt and 5.txt and i have set the interval = 1, then my program should skip one text file after each file and copy 1, 3 and 5.txt to the destination.
I have a code which simply copies from source to destination.

static void Main(string[] args)
        {
            string fileName;
            string destFile;
            string sourcePath = @"E:\Source";
            string targetPath = @"E:\Destination";
            // To copy all the files in one directory to another directory.
            string[] files = System.IO.Directory.GetFiles(sourcePath);
            // Copy the files and overwrite destination files if they already exist.
            foreach (string s in files)
            {
                // Use static Path methods to extract only the file name from the path.
                fileName = System.IO.Path.GetFileName(s);
                destFile = System.IO.Path.Combine(targetPath, fileName);
                System.IO.File.Copy(s, destFile, true);
            }
        }

[Mike Askew]

    static void Main(string[] args)
    {
        string fileName;
        string destFile;
        string sourcePath = @"E:\Source";
        string targetPath = @"E:\Destination";
        // To copy all the files in one directory to another directory.
        string[] files = System.IO.Directory.GetFiles(sourcePath);
        // Copy the files and overwrite destination files if they already exist.
        int skipNum = 1; //as per the example, set this however you like.
        int countNum = 0; //used to track how many files copied since last skipped file.
        foreach (string s in files)
        {
            if (countNum != skipNum)
            {
                // Use static Path methods to extract only the file name from the path.
                fileName = System.IO.Path.GetFileName(s);
                destFile = System.IO.Path.Combine(targetPath, fileName);
                System.IO.File.Copy(s, destFile, true);
                countNum++;
            }
            else
            {
                countNum = 0;
            }
        }
    }

Have written this in the reply without testing but its pretty simple so should work hopefully, lemme know any errors and i'll resolve.

[jumboora]

Thanks Mike....

[jumboora]

If we change the value of skipNum to 2 then it first copies 2 files into the directory and skip 1.
But I want to read (copy) first and then skip 2 and then read (copy) 4th and then skip 2....

[Mike Askew]

Ah shoot sorry missed that when reading the reqs, gimme a min, going to put this into visual studio and fix it.

[Mike Askew]

Code is tweaked and tested. With a skipNum of 2, I got files copied: 1, 2, 5, 6, 9, 10 of 10 files.

static void Main(string[] args)
        {
            string fileName;
            string destFile;
            string sourcePath = @"C:\Users\maskew\Documents\DaniWeb\Source";
            string targetPath = @"C:\Users\maskew\Documents\DaniWeb\Destination";
            // To copy all the files in one directory to another directory.
            string[] files = System.IO.Directory.GetFiles(sourcePath);
            // Copy the files and overwrite destination files if they already exist.
            bool skipNextFiles = false;
            int skipNum = 2; //as per the example, set this however you like.
            int countNum = 0; //used to track how many files copied since last skipped file.
            foreach (string s in files)
            {
                if (skipNextFiles)
                {
                    if (countNum != skipNum)
                    {
                        countNum++;
                        if (countNum == skipNum)
                        {
                            countNum = 0;
                            skipNextFiles = false;
                        }
                    }
                }
                else
                {
                    if (countNum != skipNum)
                    {
                        // Use static Path methods to extract only the file name from the path.
                        fileName = System.IO.Path.GetFileName(s);
                        destFile = System.IO.Path.Combine(targetPath, fileName);
                        System.IO.File.Copy(s, destFile, true);
                        countNum++;
                        if (countNum == skipNum)
                        {
                            countNum = 0;
                            skipNextFiles = true;
                        }
                    }
                }
            }
        }

[jumboora]

It is working fine but still copying each time 2 consecutive files, but i want to copy 1 each time and then skip 2.

[Mike Askew]

Sorry, easy fix, replace the current bottom if statement with:

                    if (countNum != skipNum)
                    {
                        // Use static Path methods to extract only the file name from the path.
                        fileName = System.IO.Path.GetFileName(s);
                        destFile = System.IO.Path.Combine(targetPath, fileName);
                        System.IO.File.Copy(s, destFile, true);
                        skipNextFiles = true;
                    }

[jumboora]

Thanks MIKE....Its working