write async Task

[user10]

Hello to the forum,

I want to store data asynchronously on the hard disk.
For this I use the following code:

Call in NT8:

Task t = Task.Run(() => { WriteAsyncNT8.WriteAsync(@"G:\mytest.txt", CurrentBar, newBar, CurrentBar, Time[0]); });

Processing in a dll:

public async Task WriteAsync(string path, int Init, bool NewBar, int Value, DateTime datetime)
{
if (Init == 1) { File.Delete(path); }

if (Init > 1 && NewBar)
{
StreamWriter sw;
sw = File.AppendText(path);
await sw.WriteAsync(Value.ToString() + "; " + datetime + ";" + Environment.NewLine);
sw.Close();
}
}

As a result I get corrupted data:

[COLOR=#c0392b][B]20; 10.01.2019 21:31:00;
20; 10.01.2019 21:31:00;[/B]
[B]22; 10.01.2019 21:33:00;
22; 10.01.2019 21:33:00;[/B][/COLOR]
24; 10.01.2019 21:35:00;
25; 10.01.2019 21:36:00;
26; 10.01.2019 21:37:00;
27; 10.01.2019 21:38:00;
28; 10.01.2019 21:39:00;
29; 10.01.2019 21:40:00;
30; 10.01.2019 21:41:00;
31; 10.01.2019 21:42:00;
32; 10.01.2019 21:43:00;
33; 10.01.2019 21:44:00;
34; 10.01.2019 21:45:00;
35; 10.01.2019 21:46:00;
36; 10.01.2019 21:47:00;
37; 10.01.2019 21:48:00;
38; 10.01.2019 21:49:00;
39; 10.01.2019 21:50:00;
40; 10.01.2019 21:51:00;
41; 10.01.2019 21:52:00;
42; 10.01.2019 21:53:00;
43; 10.01.2019 21:54:00;
44; 10.01.2019 21:55:00;
45; 10.01.2019 21:56:00;
46; 10.01.2019 21:57:00;
47; 10.01.2019 21:58:00;

The data is not only wrong at the beginning, but also within the write process for larger amounts of data.

251; 10.01.2019 17:50:00;
[COLOR=#c0392b][B]253; 10.01.2019 17:52:00;
253; 10.01.2019 17:52:00;[/B][/COLOR]
254; 10.01.2019 17:53:00;
255; 10.01.2019 17:54:00;

Is my programming faulty or do I have to cache the data first and then write it?

Thanks a lot for the support!
user10

[NinjaTrader_BrandonH]

Hello user10,

Thanks for your post.

Something you could do is save the text to a string in the data thread. Then once the text is saved to a string in the data thread, write that string to the file in the async thread.

Let us know if we may assist further.