3 indies on chart write to same file simultaneously w/StreamWriter?

[forrestang]

Howdy.

I have been using the output window for most of my data gathering, as I usually don't have much data.

Currently I am outputting data in the form of rows via one of my indies. Typically, using the output window, I just stack 3 of my indicator on the chart, and it will output them, and I can sort them later in excel.

I would like to do this with streamwriter. I can output ONE of the indicators fine. But when I try to put all 3 on a chart and run it, I get the error we put in the catch block using this reference sample:

http://www.ninjatrader.com/support/forum/showthread.php?t=3475

Is it possible to have 3 instances of an indicator open and writing to the SAME file?

[sledge]

Howdy.

I have been using the output window for most of my data gathering, as I usually don't have much data.

Currently I am outputting data in the form of rows via one of my indies. Typically, using the output window, I just stack 3 of my indicator on the chart, and it will output them, and I can sort them later in excel.

I would like to do this with streamwriter. I can output ONE of the indicators fine. But when I try to put all 3 on a chart and run it, I get the error we put in the catch block using this reference sample:

http://www.ninjatrader.com/support/forum/showthread.php?t=3475

Is it possible to have 3 instances of an indicator open and writing to the SAME file?

http://www.ninjatrader.com/support/forum/showthread.php?t=66007&highlight=write+file

[NinjaTrader_PatrickH]

Hello forrestang,

Thank you for your post.

Sledge provides a link to a forum thread were this was answered as well, the post that answers the question can be found at the following link: http://www.ninjatrader.com/support/f...18&postcount=4

This refers directly to the FileShare Enumeration: http://msdn.microsoft.com/en-us/libr...(v=VS.90).aspx

Please let me know if you have any questions.

[forrestang]

Hello forrestang,

Thank you for your post.

Sledge provides a link to a forum thread were this was answered as well, the post that answers the question can be found at the following link: http://www.ninjatrader.com/support/f...18&postcount=4

This refers directly to the FileShare Enumeration: http://msdn.microsoft.com/en-us/libr...(v=VS.90).aspx

Please let me know if you have any questions.

What needs to be changed in NT to make this work? I'm not sure how to implement that msdn reference sample into NT so that separate indicators will write to the same file?

[NinjaTrader_PatrickH]

Hello forrestang,

Thank you for your response.

You would need to add the FileStream() to the following lines of code in the OnBarUpdate() Try Catch:

 if (CurrentBar == 0)
{
fs = new FileStream(path, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
sw = File.AppendText(path);

fs would need to be defined as a FileStream in the variables section of the code:

 #region Variables
...
// Creates a StreamWriter and a StreamReader object
private System.IO.StreamWriter sw;
private FileStream fs;
#endregion