linq newbie

[ballboy11]

Hi I am new to linq and am trying to get a value from one of my lists

this is the basic statement i am trying to write

my list is the following

string firstname,
string lastname,
datetime time,
int location

Select location from myList where Time equals current time

int whichbar = this.myList.Where(d.,d.Time == Time[0] )


this is the area where I am confused

this.myList.Where(d.,d.Time == Time[0] )

if it is not the right time I just want the first one on the list closest to the time



i think i am getting close

int whichbar = this.myList.Select(o => o.location).Where(o =>o.Time == Time[0]);

my error now is cant convert to int

[NinjaTrader_ChrisL]

Hello,
Thank you for the post.
I am processing your request and will be back with you shortly.
I look forward to assisting further.

[NinjaTrader_ChrisL]

Hello,
Thank you for waiting.
Can you please provide what this is returning:

this.myList.Select(o => o.location).Where(o =>o.Time == Time[0]);

Add a Print() statement in your code. Open up a new output window (Tools>Output Window) and run it.

Like so:

Print(this.myList.Select(o => o.location).Where(o =>o.Time == Time[0]));

I look forward to your reply.

[ballboy11]

don't know if code workds

It is trying to return a single integer value at a given time.

I am not sure if the code is good. I am going through linq to see if I am coding correctly

[NinjaTrader_ChrisL]

Hello,
Thank you for the reply.
I need to know the data type of myList is and what you are expecting this to return:

 this.myList.Select(o => o.location).Where(o =>o.Time == Time[0])

I am assuming the returned value is a String. You will need to use

Int32.Parse()

. To cast to an int.
Like so:

int whichbar = 
Int32.Parse(this.myList.Select(o => o.location).Where(o =>o.Time == Time[0]));

You might need to do some custom parsing if the returned string has extraneous values that you do not want. So if the string that is returned looks like this: "foo bar 1 foo bar" and only need the "1", you will need to handle that in your code.
Here is a publicly available guide for doing so:

https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/types/how-to-convert-a-string-to-a-number

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

[ballboy11]

thanks

I got it to work kindof but for some reason my indexs don't match.

All I want to find the IndexOf the object within my array by timestamp

[NinjaTrader_ChrisL]

Thank you for the reply.
If you are comfortable posting your code file here please do, otherwise please send me your code file to platformsupport[at]ninjatrader[dot]com with 'ATTN: Chris L' in the subject line and a reference to this thread in the body of the email.

To find the file:

NT 7:
You can attach your indicator to your response by going to File > Utilities > Export NinjaScript > Export selected source files > select your Indicator > select the right arrow > Export. The file will be located under (My) Documents\NinjaTrader 7\bin\Custom\ExportNinjaScript.

NT 8:

You can export your indicator by going to Tools > Export > NinjaScript Add On > Add > select your indicator > OK > Export > name the file 'NTsupport' > Save.

The file will be located under Documents\NinjaTrader 8\bin\Custom\ExportNinjaScript. Please attach the file to your response.

I look forward to assisting further.

[NinjaTrader_ChrisL]

Good Morning,
May I confirm you saw my previous post below?

[ballboy11]

My apologies

Yes I thought I confrimed with you. I figured it out finally. Thank you for your help