Read file asynch

[ferran]

Hello,
I would like read file asynchronously or at least, close the file when I will end to read. I'am trying like here:
- http://msdn.microsoft.com/en-us/library/jj155757.aspx
- http://msdn.microsoft.com/en-us/libr...code-snippet-2
- http://msdn.microsoft.com/en-us/libr...v=vs.110).aspx

But I can not find the way to do it. Can someone help me?

Thank you in advance!

[NinjaTrader_Bertrand]

ferran, thanks for the post - do you mean you want to have concurrent access to one file from multiple scripts?

There's a discussion on it already here on our forums - http://www.ninjatrader.com/support/f...ad.php?t=66007

The async / await patterns will need a higher .NET framework version that would currently would be supported with NT7 - our next major platform update will extend that to 4.5

[ferran]

Hello,
I will have a file that will be written by other application and I need that NT7 can read it without blocking it. How can I do it?

Thank you so much in advance,
Regards

[NinjaTrader_Bertrand]

Please check into the other thread I pointed to, in short you want to ensure the file has be opened correctly to allow concurrent access.

[ferran]

Hello again!
Yes, thank you. I have solved.

The code that works:

<#region Using declarations
using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Xml.Serialization;
using NinjaTrader.Cbi;
using NinjaTrader.Data;
using NinjaTrader.Indicator;
using NinjaTrader.Gui.Chart;
using NinjaTrader.Strategy;
#endregion

// Add this to your declarations to use StreamWriter and StreamReader
using System.IO;
using System.Windows;
using System.Text;

// This namespace holds all strategies and is required. Do not change it.
namespace NinjaTrader.Strategy
{
/// <summary>
///
/// </summary>
[Description("")]
public class MCOrderclientNT7 : Strategy
{
#region Variables
// This sets the path in which the text file will be created.
private string path = "T:\\order.txt";
private FileStream fs;
// Order
private double order = 0;
#endregion

/// <summary>
/// This method is used to configure the indicator and is called once before any bar data is loaded.
/// </summary>
protected override void Initialize()
{
CalculateOnBarClose = false;
}

/// <summary>
/// Called on each bar update event (incoming tick)
/// </summary>
protected override void OnBarUpdate()
{
if (Historical)
return;
// Checks to see if the file exists
else if (File.Exists(path))
{

byte[] buffer;
FileStream fileStream = new FileStream(path, FileMode.Open, FileAccess.ReadWrite);
try
{
string fileContents;
using (StreamReader reader = new StreamReader(fileStream))
{
fileContents = reader.ReadLine();
Print("===>" + fileContents);
}
}
finally
{
fileStream.Close();
}
}
// If file does not exist, let the user know
else
Print("File does not exist.");
} //end OnBarUpdate

#region Properties

#endregion
}
}