Outside of NT 8.1.4.1, I've created a simple hello-world grpc client and server. Back in NT8, I created a script whose only goal is to try and connect to the gRPC and do nothing else, but it keeps failing to load my script with errors described below.
First, there is a packages.config inside bin\Custom that includes the following contents:
When I use nuget.exe to install these, it places all of the folders locally in bin\Custom.
Then I went into NinjaScript editor and added references to the Grpc.Core.Api and Grpc.Net.Client files, which looks like this:
Then I have code as simple as this indicator code, just to see if I can connect to my gRPC server.
When I try to add it as an indicator, well, for one, it just shows a row without a name. When I try to add it to a chart anyway, I get messages like these in the NT8 log window:
which ultimately leads to a total failure that throws an exception box with the message:
If someone has a solution, that would be so awesome! NT support, do you have any answers?
First, there is a packages.config inside bin\Custom that includes the following contents:
Code:
<?xml version="1.0" encoding="utf-8"?> <packages> <package id="Google.Protobuf" version="3.29.3" targetFramework="net48" /> <package id="Grpc.Core.Api" version="2.67.0" targetFramework="net48" /> <package id="Grpc.Net.Client" version="2.67.0" targetFramework="net48" /> <package id="Grpc.Tools" version="2.69.0" targetFramework="net48" /> </packages>
Then I went into NinjaScript editor and added references to the Grpc.Core.Api and Grpc.Net.Client files, which looks like this:
Then I have code as simple as this indicator code, just to see if I can connect to my gRPC server.
Code:
#region Using declarations
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Input;
using System.Windows.Media;
using System.Xml.Serialization;
using NinjaTrader.Cbi;
using NinjaTrader.Gui;
using NinjaTrader.Gui.Chart;
using NinjaTrader.Gui.SuperDom;
using NinjaTrader.Gui.Tools;
using NinjaTrader.Data;
using NinjaTrader.NinjaScript;
using NinjaTrader.Core.FloatingPoint;
using NinjaTrader.NinjaScript.DrawingTools;
using Grpc.Net.Client;
#endregion
//This namespace holds Indicators in this folder and is required. Do not change it.
namespace NinjaTrader.NinjaScript.Indicators
{
public class gRPCTestClient : Indicator
{
private static GrpcChannel channel;
protected override void OnStateChange()
{
if (State == State.SetDefaults)
{
Description = @"This code does nothing other than connect to a gRPC server and send a message to get an echoed response.";
Name = "gRPCTestClient";
Calculate = Calculate.OnBarClose;
IsOverlay = false;
DisplayInDataBox = true;
DrawOnPricePanel = true;
DrawHorizontalGridLines = true;
DrawVerticalGridLines = true;
PaintPriceMarkers = true;
ScaleJustification = NinjaTrader.Gui.Chart.ScaleJustification.Right;
//Disable this property if your indicator requires custom values that cumulate with each new market data event.
//See Help Guide for additional information.
IsSuspendedWhileInactive = true;
}
else if (State == State.Configure)
{
channel = GrpcChannel.ForAddress("https://localhost:7257");
}
}
protected override void OnBarUpdate()
{
//Add your custom indicator logic here.
}
}
}
#region NinjaScript generated code. Neither change nor remove.
namespace NinjaTrader.NinjaScript.Indicators
{
public partial class Indicator : NinjaTrader.Gui.NinjaScript.IndicatorRenderBase
{
private gRPCTestClient[] cachegRPCTestClient;
public gRPCTestClient gRPCTestClient()
{
return gRPCTestClient(Input);
}
public gRPCTestClient gRPCTestClient(ISeries<double> input)
{
if (cachegRPCTestClient != null)
for (int idx = 0; idx < cachegRPCTestClient.Length; idx++)
if (cachegRPCTestClient[idx] != null && cachegRPCTestClient[idx].EqualsInput(input))
return cachegRPCTestClient[idx];
return CacheIndicator<gRPCTestClient>(new gRPCTestClient(), input, ref cachegRPCTestClient);
}
}
}
namespace NinjaTrader.NinjaScript.MarketAnalyzerColumns
{
public partial class MarketAnalyzerColumn : MarketAnalyzerColumnBase
{
public Indicators.gRPCTestClient gRPCTestClient()
{
return indicator.gRPCTestClient(Input);
}
public Indicators.gRPCTestClient gRPCTestClient(ISeries<double> input )
{
return indicator.gRPCTestClient(input);
}
}
}
namespace NinjaTrader.NinjaScript.Strategies
{
public partial class Strategy : NinjaTrader.Gui.NinjaScript.StrategyRenderBase
{
public Indicators.gRPCTestClient gRPCTestClient()
{
return indicator.gRPCTestClient(Input);
}
public Indicators.gRPCTestClient gRPCTestClient(ISeries<double> input )
{
return indicator.gRPCTestClient(input);
}
}
}
#endregion
Indicator 'gRPCTestClient': Error on calling 'OnStateChange' method: Could not load file or assembly 'Grpc.Net.Client Version=2.0.0.0 Culture=neutral PublicKeyToken=d754f35622e28bad' or one of its dependencies. The system cannot find the file specified.
Unhandled exception: Non-static method requires a target.
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