play mp3 file

[mar_zim]

How do I play mp3 file in .Net? I have read that using DirectX/openGL will do the trick. So I hope JR will help me through this.

Btw Im using 1.0 framework.

[jmcilhinney]

I'm sure you can use DirectX, but you can also use MCI via Windows API, or reference the Windows Media Player COM library and use a WindowsMediaPlayerClass object, which is like the ActiveX control but without the UI.

[mar_zim]

got any good article/tutorial about that?

[jmcilhinney]

Only the MSDN topics I'm afraid as I haven't really used either myself.

MCI
WMP

If you're interested in MCI then you could check out some of wldrumstcs recent posts, as he's building a media player using purely MCI.

[dynamic_sysop]

top of your code window ...

[COLOR=Green]/// add these 2 references ... [/COLOR] 
[COLOR=Blue]using[/COLOR] System.Runtime.InteropServices; 
[COLOR=Blue]using[/COLOR] System.Text;

to use, a simple bit of code that allows you to open / play / stop an mp3 i put together ...

[DllImport("winmm.dll", EntryPoint="mciSendStringA")] 
        [COLOR=Blue]private static extern int [/COLOR] mciSendString ([COLOR=Blue]string[/COLOR] lpstrCommand, [COLOR=Blue]string[/COLOR] lpstrReturnString, [COLOR=Blue]int[/COLOR] uReturnLength, [COLOR=Blue]int[/COLOR] hwndCallback); 
        [DllImport("kernel32.dll", EntryPoint="GetShortPathNameA")] 
        [COLOR=Blue]private static extern int[/COLOR] GetShortPathName ([COLOR=Blue]string[/COLOR] lpszLongPath, StringBuilder lpszShortPath, [COLOR=Blue]int[/COLOR] cchBuffer); 
 
        [COLOR=Blue]private string[/COLOR] Alias = "MP3"; 
 
        [COLOR=Blue]private void[/COLOR] btnplay_Click([COLOR=Blue]object[/COLOR] sender, System.EventArgs e) 
        { 
            OpenFileDialog od = [COLOR=Blue]new[/COLOR] OpenFileDialog(); 
            od.Filter = "MP3 Audio(*.mp3)|*.mp3"; 
            od.RestoreDirectory = [COLOR=Blue]false[/COLOR]; 
            [COLOR=Blue]if[/COLOR](od.ShowDialog() == DialogResult.OK) 
            { 
               [COLOR=Green] /// we need to get the short path name of our file 
                /// eg: E:\Iron Maiden\(1980) Iron Maiden\04 - Phantom Of The Opera.mp3 
                /// becomes  E:\IRONMA~1\(1980)~1\04-PHA~1.MP3 
                /// to do this we use the GetShortPathName API 
                /// and the System.Text.StringBuilder class to receive the ShortPathName. [/COLOR]                 
                StringBuilder sbuild = [COLOR=Blue]new[/COLOR] StringBuilder(256); 
                GetShortPathName(od.FileName , sbuild , sbuild.Capacity); 
 
                Play(sbuild.ToString()); 
            } 
        } 
 
        [COLOR=Blue]private void[/COLOR] Play([COLOR=Blue]string[/COLOR] Mp3) 
        { 
            [COLOR=Green]/// open the mp3 file ( mp3 uses the Type MPEGVideo ) [/COLOR] 
            [COLOR=Blue]int[/COLOR] x = mciSendString("open " + Mp3 + " Type MPEGVideo Alias " + Alias , [COLOR=Blue]null[/COLOR] , 0 , 0); 
            [COLOR=Green]/// play the mp3 [/COLOR] 
            x = mciSendString("play " + Alias , [COLOR=Blue]null[/COLOR] , 0 , 0); 
        } 
 
        [COLOR=Blue]private void[/COLOR] Stop() 
        { 
            [COLOR=Blue]int[/COLOR] x = mciSendString("stop " + Alias , [COLOR=Blue]null[/COLOR] , 0 , 0); 
        } 
 
        [COLOR=Blue]private void[/COLOR] btnstop_Click([COLOR=Blue]object[/COLOR] sender, System.EventArgs e) 
        { 
            Stop(); 
        }

hope it helps

[mar_zim]

Thanks dynamic_sysop if I have some extra time I'll try that one.

Nice to see you back.

[mar_zim]

I already tested it. Yeah it works but in only one file.
Actually I add all the list of mp3 in a listbox and select a file then play it and it works fine but when I choose another mp3 file in the listbox then the problem occur, it wont work.

[dynamic_sysop]

sorry i haven't been able to post a message back, my wife was rushed in to hospital yesterday, she has severe pneumonia ( which isn't good considering she's also 33 weeks pregnant )

if i get an opertunaty i'll do a Directsound example sometime, but it'll be a while.

regards, den ( aka dynamic )

[mar_zim]

sorry i haven't been able to post a message back, my wife was rushed in to hospital yesterday, she has severe pneumonia ( which isn't good considering she's also 33 weeks pregnant )

if i get an opertunaty i'll do a Directsound example sometime, but it'll be a while.

regards, den ( aka dynamic )

I'm very sorry to hear that. I hope your wife will get well considering she's bearing your 3rd child and it's a boy(in your sig).

Don't worry mate I'll just wait till you reply.

[dynamic_sysop]

3rd child? it's our 5th child ( my 6th child ) mate
no wonder i'm starting to go grey

[Techno]

using DirectX audio is easy too

just add a reference to DirectX.AudioVideoPlayback;

then:

Audio myAudioFile = new Audio("Pathtoaudiofile.xxx");

myAudioFile.Play();

it maybe .Start() instead of Play but i cant remember
pretty much thats it

[uniquegodwin]

Using directx to play will only work if directx is installed right?

[Techno]

right
but directx is built into Windows, since Windows 98SE (I think) but defo in 2000/2003/Longhorn/Windows 98SE/ME

[uniquegodwin]

Roger that..