Send Folder from server to Client

1- I'll suppose that you have a method called 'SendFile()' takes the file name and send it to the server.

        /// <summary>
        /// the already existing method to send files.
        /// </summary>
        /// <param name="FileName">the file name</param>
        public void SendFile(string FileName)
        {
            // Code to send a single file.
        }

2- I created an overloaded function takes the file path and directory. this method will copy the file to a destination folder, and it'll create it if it doesn't exist.

        /// <summary>
        /// Create a directory and copy the file
        /// </summary>
        /// <param name="SourceFilePath">the full Path of the file to copy</param>
        /// <param name="DestinationDirectoryName">destination directory\subdirectory name</param>
        public void SendFile(string SourceFilePath, string DestinationDirectoryName)
        {
            // Code to Create Create Directory 
            if (!Directory.Exists(DestinationDirectoryPath + @"\" + DestinationDirectoryName))
                Directory.CreateDirectory(DestinationDirectoryPath + @"\" + DestinationDirectoryName);

            string FileName = SourceFilePath.Split('\\')[SourceFilePath.Split('\\').Length - 1];

            // as an example I copy the files to the new destination.
            File.Copy(SourceFilePath, DestinationDirectoryPath + @"\" + DestinationDirectoryName + @"\" + FileName);
        }

3- I created a method called 'SendDirectory' to copy the files and directories to the destination location.

        /// <summary>
        /// Sends a directory with all files and subdirectories.
        /// </summary>
        /// <param name="inDirectoryPath">Directory to copy</param>
        public void SendDirectory(string inDirectoryPath)
        {
            string DirectoryName = inDirectoryPath.Substring(inDirectoryPath.IndexOf(SourceDirectoryName), inDirectoryPath.Length - inDirectoryPath.IndexOf(SourceDirectoryName));
            string[] files = Directory.GetFiles(inDirectoryPath);
            foreach (string file in files)
            {
                // Call Send File with the file full path and destination Directory Name
                SendFile(file, DirectoryName);
            }
            string[] directories = Directory.GetDirectories(inDirectoryPath);
            foreach (string directory in directories)
            {
                // Calls itself for each subdirectory.
                 SendDirectory(directory);
            }
        }

4- Here is a final working code to copy the files to a directory, you can change the part of coping the files and creating the folder with code to perform it on the server or client.

        string SourceDirectoryName;
        string DestinationDirectoryPath;
        string SourceDirectoryPath;

        /// <summary>
        /// Sends a directory with all files and subdirectories.
        /// </summary>
        /// <param name="inDirectoryPath">Directory to copy</param>
        public void SendDirectory(string inDirectoryPath)
        {
            string DirectoryName = inDirectoryPath.Substring(inDirectoryPath.IndexOf(SourceDirectoryName), inDirectoryPath.Length - inDirectoryPath.IndexOf(SourceDirectoryName));
            string[] files = Directory.GetFiles(inDirectoryPath);
            foreach (string file in files)
            {
                // Call Send File with the file full path and destination Directory Name
                SendFile(file, DirectoryName);
            }
            string[] directories = Directory.GetDirectories(inDirectoryPath);
            foreach (string directory in directories)
            {
                // Calls itself for each subdirectory.
                 SendDirectory(directory);
            }
        }
        /// <summary>
        /// the already existing method to send files.
        /// </summary>
        /// <param name="FileName">the file name</param>
        public void SendFile(string FileName)
        {
            // Code to send a single file.
        }

        /// <summary>
        /// Create a directory and copy the file
        /// </summary>
        /// <param name="SourceFilePath">the full Path of the file to copy</param>
        /// <param name="DestinationDirectoryName">destination directory\subdirectory name</param>
        public void SendFile(string SourceFilePath, string DestinationDirectoryName)
        {
            // Code to Create Create Directory 
            if (!Directory.Exists(DestinationDirectoryPath + @"\" + DestinationDirectoryName))
                Directory.CreateDirectory(DestinationDirectoryPath + @"\" + DestinationDirectoryName);

            string FileName = SourceFilePath.Split('\\')[SourceFilePath.Split('\\').Length - 1];

            // as an example I copy the files to the new destination.
            File.Copy(SourceFilePath, DestinationDirectoryPath + @"\" + DestinationDirectoryName + @"\" + FileName);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            folderBrowserDialog1.ShowDialog();
            SourceDirectoryName = folderBrowserDialog1.SelectedPath.Split('\\')[folderBrowserDialog1.SelectedPath.Split('\\').Length - 1];
            SourceDirectoryPath = folderBrowserDialog1.SelectedPath;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            folderBrowserDialog1.ShowDialog();
            DestinationDirectoryPath = folderBrowserDialog1.SelectedPath;
            SendDirectory(SourceDirectoryPath);
        }

I hope it helps.

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