asp.net a tutorial for implementing File and folder replication

Don't say much, please look at the code:

Privatevoidbtnsave_click (Objectsender, EventArgs e)/File copy, save method { #region statically copy files (write dead) Stringdespath =@ "C:\1\1.chm"; if (file.exists (Despath)) { Destination file already exists if (MessageBox.Show ("file exists, overwrite"), "inquire", Messageboxbuttons.yesno, Messageboxicon.question) = = Dialogresult.yes)//select Yes to determine overwrite { Copying files File.Copy (@ "C:\ls\w3.chm", despath,true); MessageBox.Show ("cover success"); } } else//file does not exist { Start replication File.Copy (@ "C:\ls\w3.chm", despath,true); MessageBox.Show ("copy successful"); } Show open dialog box, return value is DialogResult type, if OK, the user clicks to open, otherwise cancel openfiledialog1.initialdirectory= (@ "c:\1");//default location when file is selected The Fileter in Openfilediaglog1.filter is the function of the filter ShowDialog () The method that displays the dialog box. Openfiledialog1.filter = "executable program |*.exe| TXT text |*.txt| picture file |*.jpg| all file |*.* ";//Can be saved type if (openfiledialog1.showdialog () = = DialogResult.OK)//click on open { if (savefiledialog1.showdialog () = = DialogResult.OK)//Description Point Yes is confirm save { File.Copy (Openfiledialog1.filename, savefiledialog1.filename,true); MessageBox.Show ("Save Complete"); } } #endregion } The file class operates on files, including replication, save, creation time, modification time, and so on. Directory features similar to file #region Dynamic Privatevoidbtncopycontents_click (Objectsender, EventArgs e) { Stringolddir, newdir;//is the original folder and the destination folder, respectively FolderBrowserDialog sourcefolder =newfolderbrowserdialog ()//dynamically generated folderbrowserdialog the control does not need to be dragged sourcefolder.description = "Please select folder to copy";//show a simple description if (Sourcefolder.showdialog () ==dialogresult.ok)//dot OK { Olddir = Sourcefolder.selectedpath; sourcefolder.description = "Please select the folder you want to copy";//Modify the Sourcefolder text to make it easier for the user to use if (sourcefolder.showdialog () = = DialogResult.OK)//If OK then execute the following code block code { Newdir = Sourcefolder.selectedpath; Gets all the files in the folder you are currently copying (note!) Does not contain subordinate folders and the files in them) string[] files = directory.getfiles (olddir);//A character array is defined to receive files that need to be copied within the source file foreach (stringfilepathinfiles)//can also use a for statement { File.Copy (filepath,newdir+ "\" +filepath). Substring (filepath. LastIndexOf ("\") +1), true); Split a bit more concise Stringnfilename//defines a string type to get the filename Nfilename = filepath. Substring (filepath. LastIndexOf ("\") + 1);//Get the file name in the folder you want to copy File.Copy (filepath, newdir + "\" + nfilename,true); Finally the folder to copy and the file name in the folder and copy } MessageBox.Show ("copy Complete"); } MessageBox.Show (Sourcefolder.selectedpath); } } #endregion