Asp. NET file operations (file information, new, move, copy, rename, upload, traverse) (pro-Test details)

do a few days of file operation, now to summarize, the error, but also hope pointing! For example, if you are working with a folder, you can basically replace file with directory (for example:FileInfo file = new FileInfo (Path); With DirectoryInfo directory = new DirectoryInfo (Path);)

1 Getting file information

The following code can get the details of a file in the case of knowing the relative path of the file

1           Public Staticvoid FileInfo (stringPath)2         {3Path = Server.MapPath (path);//get the physical path of a file4FileInfo file =NewFileInfo (Path);//instance the path file information5             varLength=file. Length;//file size, bytes6             varName = file. Name;//file name7             varFullName = file. FullName;//file path8             varExtension = file. Extension;//file suffix name9......
Ten}

The information obtained also has the creation time, the last visit time and so on, can study independently

2 new File

Create a new file

1        Publicstatic void NewFile (stringFilePath)2         {3Filepath=server.mappath (FilePath);//get the physical path to the file you want to create4             if(System.IO.File.Exists (newfilepath))5             {6                 //determine if a new file already exists7                 Throw NewException ("file already exists")8             }9 TenSystem.IO.File.Create (Newfilepath);//Create One             ...... A}

3 Copy files, move (cut) files, rename files

To copy a file:

1          Publicstatic void Copy (stringPath,stringTargetPath)2         {3Path = Server.MapPath (path);//the physical path of the original file4TargetPath = Server.MapPath (TargetPath);//the physical path to the new location to copy to5             //determine if a new address exists to rename the file6             if(System.IO.File.Exists (TargetPath))7             {8                 Throw NewException ("There is a file with the same name");//Throw Exception9             }        
TenSystem.IO.File.Copy (Path,targetpath);//Copy to new location, overwriting existing files is not allowed One             ....... A}

To move a file, rename it:

1       Publicstatic void Moveorrename (stringPath,stringTargetPath)2         {3Path = Server.MapPath (path);//the physical path of the original file4TargetPath = Server.MapPath (TargetPath);//The physical path to the new location to which the file will be renamed if it is still the current folder5             //determine if a new address exists to rename the file6             if(System.IO.File.Exists (TargetPath))7             {8                 //determine if the new location exists with the same name (judging that renaming is a dog and other file conflicts)9                 Throw NewException ("A file with the same name already exists");Ten             }
 OneSystem.IO.File.Move (Path,targetpath);//2 files are moved in different directories, if they are renamed in the same directory A             ...... -}

Copying files will not be deleted, moved or renamed (the same way, the target location is different) will delete the original file.

4 Uploading files

1[HttpPost]//receive file data from the foreground via POST request2          PublicActionResult UploadFile (stringDirpath)3         {4             varfilepath = Server.MapPath (Path);//gets the physical path of the uploaded file to the directory5             varFile = request.files["file"];//Get file Contents6             if(File = =NULL|| File. ContentLength = =0)7             {8                 Throw NewException ("file does not exist");//simple judgment on the file9             }Ten             varNewfilepath = Server.MapPath (Dirpath +"\\"+ file. FileName);//gets the physical path of the file name One             //determine if the file to be uploaded is renamed to a file in the directory A             if(System.IO.File.Exists (newfilepath)) -             { -                 Throw NewException ("file does not exist");//simply determine if the file exists the             } -             //The file is stored in the specified file; - file. SaveAs (Newfilepath); -             ...... +}

Automatically creates a file containing the class size and name, without superfluous to create a new file and put it into the content.

5 traversing all files in the current directory and its subdirectories

1       Private Static string[] GetFiles (stringDirstringRegexpattern =NULL,BOOLRecurse =true,BOOLThrowex =false)2         {3             //recurse: Whether recursive4             //Throwex: Whether to report an exception5list<string> LST =Newlist<string>();6             Try7             {8                 foreach(stringIteminchdirectory.getfilesystementries (dir))9                 {Ten                     Try One                     { A                         BOOLIsfile = (System.IO.File.GetAttributes (item) & fileattributes.directory)! =fileattributes.directory; -  -                         if(Isfile && (Regexpattern = =NULL|| Regex.IsMatch (Path.getfilename (item), Regexpattern, Regexoptions.ignorecase |regexoptions.multiline ))) the {lst. ADD (item); } -  -                         //Recursive -                         if(Recurse &&!isfile) {lst. AddRange (GetFiles (item, Regexpattern,true)); } +                     } -                     Catch{if(Throwex) {Throw; } } +                 } A             } at             Catch{if(Throwex) {Throw; } } -  -             returnlst. ToArray (); -}

This is not much to say, the code found online, pro-test effective.

Asp. NET file operations (file information, new, move, copy, rename, upload, traverse) (pro-Test details)