stream reader onbarupdate

[tonynt]

Hello,

I want to ask how I can force stream reader (I use it for reading from web) in onbarupdate eg only with close of bar when running a script with cobcfalse. Because NT7 was frozen all the time I put it to onstartup, but I need to read it during a trade in onbarupdate for moving stops. I have now:

string uri = @"https://www.dropbox.com/s/" + filePath;
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(uri);
HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
using (StreamReader sr = new StreamReader(resp.GetResponseStream()))
{
string line;
while ((line=sr.ReadLine())!=null)
{
string[] parts = line.Split(',');
and so on.............

Whats wrong with this please or what do I have to add so that I can use it in onbarupdate without freezing?

Thank you!
Tony

[sledge]

Is this close enough?

https://ninjatrader.com/support/helpGuides/nt7/?firsttickofbar.htm

[sledge]

You might also consider using a timer in NT.,

It might be even more feasible to write a separate program that runs every 30 seconds/1 minute, etc, writes the data to a file, and then NT reads that file. That way NT won't "freeze". You'll have to work out locking issues, etc.

[tonynt]

sledge,

thank you for your reply. In the meantime I added FirstTickOfBar but also then its freezing and I have to shut down NT7 from taskmanager. When running the script with COBCtrue then its also freezing when enabling the script.

So it seems that it works only in OnStartUp but not in OnBarUpdate. (its a good idea with reading in a separate program but this will not work then as well, no?)

Than you!
Tony

[sledge]

Without debugging I don't have much further to speculate on your code.

dropbox.com could be refusing connection?, or your code is some how entering an infinite loop while parsing.

I remember writing some code - to parse my cable modem's webpage to find the status of the signal. I have since lost this code.

You might want to fully debug the code in OnBarUpdate after you slow it down.

[NinjaTrader_AlanP]

Hello Tonynt,

Thank you for your note.

Without the script I'm unable to test on my end however I'm curious if you first download the file, then parse it, if that would prevent the freeze?

Here is a link to a sample where I first download the file then parse it,

https://ninjatrader.com/support/forum/local_links.php?action=sendtofriend&catid=7&linkid=951

Please let us know if this does not resolve the issue.

[tonynt]

Alan,

get the error message when importing to NT7.

Thanks
Tony

[NinjaTrader_AlanP]

Hello tonynt,

The indicator I linked to is for NinjaTrader 8 and was provided to demonstrate how to download data then parse it.

Please let us know if you need further assistance.

[EminiTrader]

Alan P: any chance of getting that file you linked to here since I can not download anything from the User Fileshare area...

[NinjaTrader_Jesse]

Hello EminiTrader,

The file that was previously linked to has been removed for the time being, I checked with Alan and he noted that it needed to be updated and needed to be removed until that was able to happen. If you are looking for a specific concept from that indicator I could suggest to do a general web search for "C# download file" or "C# parse file" as some examples. Currently we only have a sample of reading/writing files and that really is just standard C# so any external tutorials can help here.


Please let me know if I may be of further assistance.