winforms - Play video from blob data Oracle using C# -

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i have created simple project save blob file data oracle database using c# winform , worked fine. now, wanna play video blob oracle data using c# couldn't. here code:

if (koneksidb.con.state == connectionstate.open) {     koneksidb.con.close(); } koneksidb.con.open(); oraclecommand cmd = new oraclecommand(); oracledatareader dr; cmd.commandtext = @"select id,filename, filedata, keterangan, substr(filename, -4)as fileextention latihanfilemanager id = '1' , ispreview = n'1'"; cmd.connection = koneksidb.con; dr = cmd.executereader(); while (dr.read()) {     string fileextention = dr["fileextention"].tostring(); //got file extention database     switch(fileextention)     {         case ".pdf": //when blob pdf file worked fine             byte[] filebytes = (byte[])dr["filedata"];             system.io.memorystream stream = new system.io.memorystream(filebytes);             fmpdfviewer f = new fmpdfviewer();             f.pdfviewer1.loaddocument(stream); //when file .pdf can display preview using pdf viewer in devexpress             f.show();             break;         case ".mp4": //when blob video             string path = ""; //here problem how can play file video blob oracle data             fmvideoviewer vd = new fmvideoviewer();             vd.axwindowsmediaplayer1.url = path;             vd.axwindowsmediaplayer1.settings.autostart = true;             vd.show();             break;     } } dr.close();

really need solution, before.

you can save file on disk , play it. 

byte[] bytes = (byte[])dr["filedata"];     string name = (string)dr["filename"] + (string)dr["fileextention"];     var path = system.io.path.combine(application.startuppath, name); system.io.file.writeallbytes(path , bytes); this.axwindowsmediaplayer1.url = path; this.axwindowsmediaplayer1.ctlcontrols.play();

you can use application.startuppath or other path prefer cache files.

after while it's better cleanup cached files.


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