EasyLanguage to NinjaScript

[RobinT]

yes, and I am referring to the dll commands.

[NinjaTrader_PatrickH]

Calling any function in the DLL will automatically initiate a connection to the server, but that doesn't seem to happen with Last.

When you use the Command for the Last price, what is occurring?

[RobinT]

when I have connected manually to external the Last is passed through to NT correctly.
when I am not connected the last is ignored and nothing happens. It does not connect automatically.

[NinjaTrader_PatrickH]

when I have connected manually to external the Last is passed through to NT correctly.
when I am not connected the last is ignored and nothing happens. It does not connect automatically.

Correct, it would not be expected to connect automatically based on a Command.

[RobinT]

the guide says

int Connected(int showMessage)

Returns a value of zero if the DLL has established a connection to the NinjaTrader server (application) and if the ATI is currently enabled or, -1 if it is disconnected. Calling any function in the DLL will automatically initiate a connection to the server. The parameter showMessage indicates if a message box is displayed in case the connection cannot be established. A value of 1 = show message box, any other value = don't show message box.

"Calling any function in the DLL will automatically initiate a connection to the server"

if that does not work, how do I do it?

[NinjaTrader_PatrickH]

Hello RobinT,

Thank you for your response.

Please provide the full lines of code used to verify this on your end.

[RobinT]

[DllImport("NTDirect.dll")]
public static extern int Last(string instrument, double price, int size);

sets up the dll,

if (Last(sym, close, 100) == -1)
{
System.Console.WriteLine("There was an error calling ninja - terminating execution");
FileOK = false;
}

sends the data.

if there is no connection, one is not established.

[RobinT]

also,

[DllImport("NTDirect.dll")]
public static extern int TearDown();

if (TearDown() == 0)
{
if (File.Exists(localFilePath + fileName))
{
try { File.Delete(localFilePath + fileName); }
catch { Console.WriteLine("Cannot Delete " + fileName); }
}
}

doesn't work either, so I cant disconnect and reconnect the interface.

TearDown() returns 0, but does not disconnect.

[RobinT]

I would be grateful if you could look at this as I cannot control the datastream without being able to connect and disconnect.

[NinjaTrader_PatrickH]

if (Last(sym, close, 100) == -1)

This does not return 0 if successfully connected, it returns 0 if setting the last price was successful.

int Connected(int showMessage)

This returns 0 if connected successfully.

TearDown() returns 0, but does not disconnect.

I am guessing but you are determining it is not successful by looking to the Control Center of NinjaTrader and seeing that the External Data Feed is connected, correct?
If so, the External Data Feed will always show connected and in green. Even after you call TearDown(). TearDown() returns 0 when your application has successfully disconnected from NinjaTrader, not if the External Data Feed is disconnected in NinjaTrader.

Please let me know if you have any questions.

[RobinT]

yes you are connected, I am looking at the control center. I will look at the response.

[RobinT]

I understand that the response from Last is if the post was successful, but Last does not seem to connect automatically.

[RobinT]

Is there anyway of connecting to external automatically on NT startup. I am trying to cutdown user intervention.

[NinjaTrader_PatrickH]

Hello Robin T,

There is not a means in code to automatically connect. You could edit the user's Config but this would not be recommended.

[RobinT]

Users config? where would I find that?