Re: process.Startinfo - C# Discussion Boards

8-Feb-09 16:25

Hello all!

I'm trying to launch a track in my music player of choice.

the command line is something like the following

c:\OtsLabs\OtsPlay.exe c:\track to be played includes spaces.ots|3 /play

the "|3" is the track within the album file to be played.

I can get Windows Media player to load a wav track without spaces, but not with, and the extra bits of command arguments... I can't seem to get them to work at all with my app.

The best I can do with this app is to open the playing app, empty.

The filetype in windows explorer has the following play action...

"C:\OtsLabs\OtsPlay.exe" "%1" /play

Thanks for your assistance.

Kristian Sixhøj8-Feb-09 16:31

Kristian Sixhøj

8-Feb-09 16:31

Try putting the filename in quotes. That should help.

Kristian Sixhoej
"You can't undo the past... but you can certainly not repeat it." - Bruce Willis

Jumpin' Jeff9-Feb-09 5:30

9-Feb-09 5:30

My appologies, but using the startinfo arguments, it is in quotes.

If I put it all in quotes, it won't load, if I put just the filename in quotes, and put the |3 /play outside, I get a compile error. With only the filename (in quotes), it still won't open the file. Just the application.

akidan9-Feb-09 5:38

9-Feb-09 5:38

To prevent compiler errors, you need to escape your quotes. How you escape them depends on if you're using normal (use \") or literal (use "") strings here. I recommend literal strings here.

Normal string:

myarguments = "\"C:\\track to be played includes spaces.ots|3\" /play";

Literal string:

myarguments = @"""C:\track to be played includes spaces.ots|3"" /play";

Jumpin' Jeff9-Feb-09 6:52

9-Feb-09 6:52

Interesting!

I'll give that a shot!

Thanks!

Jumpin' Jeff9-Feb-09 16:18

Military (Midnight) DateTime subtraction

9-Feb-09 16:18

Thanks for the assistance thus far.

I was able to launch the player and load a file now, but now, I can only seem to load the first file from my listview.

r.path = a string pulled from an ObjectListView control indicating the file location.

string path = r.fPath;

System.Diagnostics.Process.proc = new System.Diagnostics.Process();
proc.EnableRaisingEvents = false;
proc.StartInfo.Filename = @"\otsplay.exe";
proc.StartInfo.Arguments = path;
proc.Start();

The code above works on all the tracks belonging to the first file in the objectlistview, but nothing past.

When I view the strings via messagebox, the path is valid, but the player opens empty unless it is the first file in the list.

I don't understand why this is occuring.

Any ideas?

It appeas as though it's not recognized as a literal, yet it recognizes the first query from the list.

Thanks again!

Equalizer

MNantu8-Feb-09 11:22

MNantu

8-Feb-09 11:22

Hey everyone,

I want to prepare an equalizer for a little project of mine. I did some googling but all I found was preparing an equalizer was completely about DSP. I am trying to find some useful books about DSP, but in the meantime, does anyone have a useful resource? Or can anyone point me in the right direction?

Any help would be greatly appreciated!

Thank you.

Re: Equalizer

Ravadre8-Feb-09 15:51

Ravadre

8-Feb-09 15:51

Hello,

First of all, here on Codeproject there are few articles that could help you. Look for keywords like FFT, Guitar tune. They actually cover most of things you want to know about when writing one, at least, basics.
Getting ready to use code that will do discrete fourier transform for you isn't hard, and that's actually most of DSP you actually will need.
As for more specific algorithms, chapter 12 of this book would be good start I guess.

Hope those general ideas were helpful at least a bit.

Re: Equalizer

MNantu8-Feb-09 22:48

MNantu

8-Feb-09 22:48

Thank you, Ravadre!

I will take a look at the articles and the book you suggested.Thanks again! Smile | :)

Re: Equalizer

ellappane18-Oct-09 2:16

ellappane

18-Oct-09 2:16

hi dude ,

Can you help me in getting Equalizer Sample code in MFC pls , i want it as soon as possible.

thanks
ellappan

Jacob D Dixon8-Feb-09 9:43

8-Feb-09 9:43

How would I fix this problem I am having?

I am reading datetime values from a database.

DateTime timeIn = DateTime.Parse(myReader["TimeIn"].ToString());
DateTime timeOut = DateTime.Parse(myReader["TimeOut"].ToString());

TimeSpan timeHere = timeOut.Subtract(timeIn);

Now this code works perfectly except for dealing with midnight.

If the person is here at 1:30PM and leaves at lets say 12:04AM, then how do I calulate that? It returns an hour of -13?
The time is entered at 00:04 when put in the datebase (It doesn't let you enter 24:04)

akidan8-Feb-09 10:02

8-Feb-09 10:02

Is there an actual date associated with the value, or is it strictly time only?

If it is time only, this explains why you're getting a negative value... A simple workaround may be to simply add 24 hours to your result if timeHere is negative, as you can hopefully assume nobody's time traveling and clocking out before they clock in. Smile | :)

Jacob D Dixon8-Feb-09 10:08

8-Feb-09 10:08

LOL. It is just time only.

So if timeOut.Hour == 0 then I use it to add 24 hours to it then do the subtraction right

akidan8-Feb-09 10:16

8-Feb-09 10:16

Well, except then you'll get someone poor sod who works until 1am who blows that assumption up. Smile | :)

I think you can do something like

if (timeHere < TimeSpan.Zero)
    timeHere += TimeSpan.FromDays(1);

I think this should work, as long as nobody is working longer than 24 hours shifts. Wink | ;)

I don't have a compiler in front of me, so you may want to try a few values in that and make sure it works as expected, though. Smile | :)

Jacob D Dixon8-Feb-09 10:20

8-Feb-09 10:20

Ok I did

timeOut = timeOut.AddHours(24);

then completed it.. It works, thanks!

akidan8-Feb-09 10:22

8-Feb-09 10:22

Happy to be of assistance. Smile | :)

darkelv8-Feb-09 18:13

darkelv

8-Feb-09 18:13

Well, until there's one guy who stayed for longer than 1 day there... Wink | ;)

paas8-Feb-09 10:09

paas

8-Feb-09 10:09

In military time, 00:04 is 12:04AM. There is no such thing as 24:04 in military time; military time starts at 0000 (midnight).

If you are subtracting 1:30PM from 12:04AM for the same date, you should get a timespan result of -13:26.

Jacob D Dixon8-Feb-09 10:24

8-Feb-09 10:24

Thanks,

I knew there wasnt a 24 but it doesnt work if you subtract 00 from any other number to get the correct time..

So I added 24 to the time that held the midnight number to subtract the other time.

PIEBALDconsult8-Feb-09 12:36

PIEBALDconsult

8-Feb-09 12:36

That would be why you should store the full date and time.

Luc Pattyn8-Feb-09 12:50

Luc Pattyn

8-Feb-09 12:50

A true evangelist would add "according to ISO 8601" Laugh | :laugh:

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modified on Friday, June 10, 2011 11:32 PM