Does anyone have an extremely simple example for how to start up IQFeed via C# in Studio (.NET 3.0), preferably a console app?

The reason I ask is that, while I have used IQFeed extensively via Python, I am completely unfamiliar with C#, Visual Studio, or COM. I'm currently trying to learn all 3 today and banging my head against the whole situation as I am so unfamiliar with the 3 that I'm having trouble focusing on the exact path to debugging my issue.

Any help would be appreciated. Until then I'm going to rip apart the DTN example (which, to frustrate things more, is blowing up in 2008/Vista).

I feel like an idiot because my professional programming experience tells me I am missing something extremely basic.




FYI I have references to AxInterop.IQFEEDYLib, IQ_APILib, System.Windows.Forms, and IQFEEDYLib. Code is as follows, with the error occuring at
this.IQFeed = new AxIQFEEDYLib.AxIQFeedY();





using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace IQTest
{
class Program
{
private AxIQFEEDYLib.AxIQFeedY IQFeed;

[STAThread]
static void Main(string[] args)
{
Program i = new Program();
i.InitIQFeed();

}

private void InitIQFeed()
{
this.IQFeed = new AxIQFEEDYLib.AxIQFeedY();
string iqName = "IQ_TEST";
string iqVersion = "0.1";
string iqKey = "0.1";

this.IQFeed.RegisterClientApp(ref iqName, ref iqKey, ref iqVersion);
}
}
}

I have references to AxIQFEEDYLib IQ_APILib, IQFEEDYLib, DTNHISTORYLOOKUPLIb, DTNNEWSLOOKUPLib etc..

I pulled most of it from the C# example they provided, I'm not doing a console app but..

In my form class i have

static public AxIQFEEDYLib.AxIQFeedY IQFeed;

In InitializeComponent i have..

IQFeed = new AxIQFEEDYLib.AxIQFeedY();

((System.ComponentModel.ISupportInitialize)(IQFeed)).BeginInit();
IQFeed.Enabled = true;
IQFeed.Location = new System.Drawing.Point(486, 8);
IQFeed.Name = "IQFeed";
IQFeed.OcxState = ((System.Windows.Forms.AxHost.State)(resources.GetObject("IQFeed.OcxState")));
IQFeed.Size = new System.Drawing.Size(100, 24);
IQFeed.TabIndex = 4;
IQFeed.Visible = false;
((System.ComponentModel.ISupportInitialize)(IQFeed)).EndInit();

All the other form setup is in the code. I've not tried decoupling the object from the form yet..

Hope that helps..

S

I came up with a working version using DllImport; this is actually pretty close to how I used to do it in Python via ctypes. This console app is as simple as it gets (no callbacks, etc).

Since I am using DllImport I removed all the references I had made.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace IQTest
{
    class Program
    {
        [DllImport("IQ32.dll")]
        private static extern int RegisterClientApp(int hClient, string sProductName, string sProductKey, string sProductVersion);
        
        [STAThread]
        static void Main(string[] args)
        {
            Program i = new Program();
            i.InitIQFeed();
        }

        private void InitIQFeed()
        {
            string iqName = "IQ_TEST";
            string iqVersion = "0.1";
            string iqKey = "0.1";
                      
            RegisterClientApp(10, iqName, iqVersion, iqKey);
        }
    }
} 

Of course now it looks like I have to start IQFeed via another program that is 32bit and connect via sockets from a 64bit app if I want 64 bit... grrrrrrr....

Hello squirlhntr,

you could check out my project.... https://github.com/mathpaquette/IQFeed.CSharpApiClient
I handle almost all features from the IQFeed Api in native c# code....

Thank you.