Actual combat MVC5+EF6+MYSQL Enterprise Network Disk Combat (15)--Logical refactoring 2

Write in front

The previous article modifies the logic of file upload, which modifies the logic of the file download.

Series Articles

[Ef]vs15+ef6+mysql Code First mode

Actual combat MVC5+EF6+MYSQL Enterprise Network Disk Combat (1)

Actual combat MVC5+EF6+MYSQL Enterprise Network Disk Combat (2)--User Registration

Actual combat MVC5+EF6+MYSQL Enterprise Network Disk Combat (3)--Verification code

Actual combat MVC5+EF6+MYSQL Enterprise Network Disk Combat (4)--Upload Avatar

[Bootstrap]modal Popup box

Actual combat MVC5+EF6+MYSQL Enterprise Network Disk Combat (5)--login interface, avatar and other proportional compression

Actual combat MVC5+EF6+MYSQL Enterprise Network Disk Combat (5)--page template

Actual combat MVC5+EF6+MYSQL Enterprise Network Disk Combat (5)--ajax mode registration

Actual combat MVC5+EF6+MYSQL Enterprise Network Disk Combat (6)--ajax mode login

Actual combat MVC5+EF6+MYSQL Enterprise Network Disk Combat (7)--File upload

Actual combat MVC5+EF6+MYSQL Enterprise Network Disk Combat (8)--File download, delete

Actual combat MVC5+EF6+MYSQL Enterprise Network Disk Combat (9)--Edit file name

Actual combat MVC5+EF6+MYSQL Enterprise Network Disk Combat (10)--New Folder

Actual combat MVC5+EF6+MYSQL Enterprise Network Disk Combat (11)--New Folder 2

Actual combat MVC5+EF6+MYSQL Enterprise Network Disk Combat (12)--new folder and upload file

Actual combat MVC5+EF6+MYSQL Enterprise Network Disk Combat (13)--Edit folder

Actual combat MVC5+EF6+MYSQL Enterprise Network Disk Combat (14)--Logical reconstruction

Actual combat MVC5+EF6+MYSQL Enterprise Network Disk Combat (15)--Logical refactoring 2

File download

The downloaded parameters are the same, but this time it is necessary to find the files in the directory Netdisk according to the MD5 of the files. So that you can actually find the physical file.

The code is as follows:

        /// <summary>        ///File Download/// </summary>        /// <param name= "FileId" ></param>         Public voidDownLoadFile (stringfileId) {UserInfo UserInfo= session["User"] asUserInfo; if(UserInfo = =NULL) {redirecttoaction ("Login","UserInfo"); return; }            if(string. IsNullOrEmpty (fileId)) {Throw NewArgumentNullException ("FileId is Errror"); }            intID =Convert.ToInt32 (fileId); varFindFile = _myfileservicerepository.find (x = = X.id = =ID); if(FindFile = =NULL) {alertmsg ("file does not exist",""); return; }            stringFilePath = Path.Combine (Server.MapPath ("~/netdisk/"), FINDFILE.FILEMD5 +findfile.fileext); //download a file as a stream of charactersFileStream fs =NewFileStream (FilePath, FileMode.Open); byte[] bytes =New byte[(int) fs.            Length]; Fs. Read (Bytes,0, Bytes.            Length); Fs.            Close (); Response.ContentType="Application/octet-stream"; //notifies the browser to download a file instead of opening itResponse.AddHeader ("content-disposition","attachment; Filename="+Httputility.urlencode (Findfile.filename, System.Text.Encoding.UTF8));            Response.BinaryWrite (bytes);            Response.Flush ();        Response.End (); }

Summarize

The logic of the download is also very good to modify, just modify the path of the file, in the database already have MD5 and file extension, this time stitching a file of the true path can be.

[Actual combat]mvc5+ef6+mysql Enterprise Network Disk Combat (15)--Logical refactoring 2