C # for file operations

1 //C # append file2StreamWriter SW = File.appendtext (Server.MapPath (".")+"\\myText.txt"); 3Sw. WriteLine ("chasing ideals"); 4Sw. WriteLine ("kzlll"); 5Sw. WriteLine (". NET Notes"); 6 SW. Flush (); 7 SW. Close (); 8 9 //C # Copy filesTen stringOrignfile,newfile; OneOrignfile = Server.MapPath (".")+"\\myText.txt";  ANewFile = Server.MapPath (".")+"\\myTextCopy.txt";  -File.Copy (Orignfile,newfile,true);  -  the //C # Delete files - stringDelfile = Server.MapPath (".")+"\\myTextCopy.txt";  - File.delete (delfile); -  + //C # moving files - stringOrignfile,newfile; +Orignfile = Server.MapPath (".")+"\\myText.txt";  ANewFile = Server.MapPath (".")+"\\myTextCopy.txt";  at File.move (orignfile,newfile); -  - //C # Create a directory - //Create directory C:\sixAge -DirectoryInfo D=directory.createdirectory ("C:\\sixage");  - //D1 point to C:\sixAge\sixAge1 inDirectoryInfo D1=d.createsubdirectory ("SixAge1");  - //D2 point to C:\sixAge\sixAge1\sixAge1_1 toDirectoryInfo d2=d1. Createsubdirectory ("sixage1_1");  + //set the current directory to C:\sixAge -Directory.setcurrentdirectory ("C:\\sixage");  the //Create directory C:\sixAge\sixAge2 *Directory.CreateDirectory ("SixAge2");  $ //Create directory C:\sixAge\sixAge2\sixAge2_1Panax NotoginsengDirectory.CreateDirectory ("Sixage2\\sixage2_1");  -  the //recursively delete folders and files +<%@ Page language=c#%> A<%@ Importnamespace="System.IO"%> the<script runat=server> +  Public voidDeleteFolder (stringdir) - {  $     if(Directory.Exists (dir))//If there is a deletion of this folder $     {  -         foreach(stringDinchdirectory.getfilesystementries (dir)) -         {  the             if(file.exists (d)) -File.delete (d);//Delete files directly from themWuyi             Else  theDeleteFolder (d);//recursively Delete Subfolders -         }  WuDirectory.delete (dir);//Delete an empty folder -Response.Write (dir+"Folder deletion succeeded");  About     }  $     Else  -Response.Write (dir+"The folder does not exist");//Prompt if the folder does not exist - }  -  A protected voidPage_Load (Object sender, EventArgs e) + {  the     stringDir="d:\\gbook\\11";  -DeleteFolder (Dir);//calling a function to delete a folder $}

// ======================================================
Implement a static method copy all the contents below the specified folder to the target folder
If the destination folder is a read-only property, an error occurs.
// ======================================================

1  Public Static voidCopydir (stringSrcpath,stringAimpath)2 {3     Try4     {5         //check whether the destination directory ends with a directory split character if it is not added6         if(aimpath[aimpath.length-1] !=Path.directoryseparatorchar)7Aimpath + =Path.directoryseparatorchar;8         //determine if the target directory exists and if it does not exist, create a new9         if(!directory.exists (aimpath))Ten directory.createdirectory (aimpath); One         //get a list of the files in the source directory, which is an array containing the files and directory paths A         //If you point to the file below the copy destination file and do not include the directory, use the following method -         //string[] fileList = Directory.GetFiles (Srcpath); -         string[] FileList =directory.getfilesystementries (srcpath); the         //traverse all files and directories -         foreach(stringFileinchfileList) -         { -             //as directory processing, if this directory is present, recursively copy the files under the directory +             if(directory.exists (file)) -Copydir (file,aimpath+path.getfilename (file)); +             //Otherwise, the direct copy file A             Else atFile.Copy (file,aimpath+path.getfilename (file),true); -         } -     } -     Catch(Exception e) -     { - MessageBox.Show (e.tostring ()); in     } - } to  +  -  Public Static voidDeletedir (stringAimpath) the { *     Try $     {Panax Notoginseng         //check whether the destination directory ends with a directory split character if it is not added -         if(aimpath[aimpath.length-1] !=Path.directoryseparatorchar) theAimpath + =Path.directoryseparatorchar; +         //get a list of the files in the source directory, which is an array containing the files and directory paths A         //If you point to the file below the delete target file and do not include the directory, use the following method the         //string[] fileList = Directory.GetFiles (Aimpath); +         string[] FileList =directory.getfilesystementries (aimpath); -         //traverse all files and directories $         foreach(stringFileinchfileList) $         { -             //as directory processing, if the directory is present, recursively delete the file under the directory. -             if(directory.exists (file)) the             { -Deletedir (aimpath+path.getfilename (file));Wuyi             } the             //Otherwise, delete the file directly -             Else Wu             { -File.delete (aimpath+path.getfilename (file)); About             } $         } -         //Delete a folder -System.IO. Directory. Delete (Aimpath,true); -     } A     Catch(Exception e) +     { the MessageBox.Show (e.tostring ()); -     } $}

C # for file operations