Comments for valerio.net

Comment on ThreadPool.QueueUserWorkItem With Multiple Arguments by MattMuenzner

MattMuenzner — Wed, 07 Mar 2012 21:34:45 +0000

Hey its awesome thanks alot!

Here is the VB Translation i made:

Public Shared Function QueueUserWorkItem(Of T)(ByVal state As T, ByVal callback As Action(Of T)) As Boolean

Return ThreadPool.QueueUserWorkItem(Sub(o) callback(CType(o, T)), state)

End Function

Public Shared Function QueueUserWorkItem(Of T, U)(ByVal state As T, ByVal state2 As U, ByVal callback As Action(Of T, U)) As Boolean

Return ThreadPoolHelper.QueueUserWorkItem(New With {Key .Args1 = state, .Args2 = state2}, Sub(o) callback(o.Args1, o.Args2))

End Function

Comment on A Type-safe BackgroundWorker Wrapper by Dave

Dave — Thu, 16 Feb 2012 10:28:46 +0000

You never dispose that wrapper. It’s a memory leak!

Comment on ThreadPool.QueueUserWorkItem With Multiple Arguments by Shaun Bowe

Shaun Bowe — Wed, 01 Feb 2012 20:01:29 +0000

Nice work!

Comment on A Queued BackgroundWorker Using Generic Delegates by steve

steve — Mon, 19 Dec 2011 23:54:15 +0000

Thanks for this article. I have a question. I would like to pass a function that takes in parameter, but in the argument line it doesn’t allow you to pass parameter as it is a Action of T Implementation. I need my argument to be readily available so when the worker get to my item function it knows the object. How would i do that?

Comment on A Queued BackgroundWorker Using Generic Delegates by Nanda

Nanda — Wed, 07 Dec 2011 14:32:24 +0000

Hi,

Good article, I tried to reproduce this with ReportProgress too, but getting cross-thread exception (InvalidOperationException), can you update with a ReportProgress option too please?

Thanks,
Nanda

Comment on Use ThreadPool.QueueUserWorkItem With Anonymous Types by Iskren Ivanov

Iskren Ivanov — Fri, 25 Nov 2011 10:09:22 +0000

Instead your own InputData class, you can simply use arrays.

Comment on Recursion in F# and the Tail Recursion Police by Using a DataReader like a List in F#

Using a DataReader like a List in F# — Sat, 08 Oct 2011 00:21:23 +0000

[...] not making a tail call. F# uses a technique called Tail Call Optimization (TCO, explained here, here and here) to make code run more efficiently. Basically, what that does is take a recursive function [...]

Comment on Use ThreadPool.QueueUserWorkItem With Anonymous Types by flippster

flippster — Wed, 21 Sep 2011 14:09:42 +0000

This is a very nice article. I just wanted to point out that you could also use reflection to get at your type information from within the thread

var blah = new { One = “heheh”, Two= 1234 };

ThreadPool.QueueUserWorkItem(new WaitCallback(ThreadFire), blah);

static void ThreadFire(object objInput)
{
Lets use reflection
Type t = objInput.GetType();

// Get OPC Client property
PropertyInfo p1 = t.GetProperty(“One”);
var one_ = (string)p1.GetValue(objInput, null);

// Get Tag Name property
PropertyInfo p2 = t.GetProperty(“Two”);
var tagName = (int)p2.GetValue(objInput, null);
}

Comment on Use ThreadPool.QueueUserWorkItem With Anonymous Types by flippster

flippster — Wed, 21 Sep 2011 14:08:58 +0000

var blah = new { One = “heheh”, Two= 1234 };

ThreadPool.QueueUserWorkItem(new WaitCallback(ThreadFire), blah);

static void ThreadFire(object objInput)
{
Lets use reflection
Type t = objInput.GetType();

// Get OPC Client property
PropertyInfo p1 = t.GetProperty(“One”);
var one_ = (string)p1.GetValue(objInput, null);

// Get Tag Name property
PropertyInfo p2 = t.GetProperty(“Two”);
var tagName = (int)p2.GetValue(objInput, null);
}

Comment on A Queued BackgroundWorker Using Generic Delegates by Target-Tracking with the Kinect, Part 3 – Target Tracking Improved, and Speech Recognition « Mark Gilbert’s Blog

Sun, 11 Sep 2011 03:36:02 +0000

[...] What I found was an unbelievably perfect solution from Matt Valerio with his post titled "A Queued BackgroundWorker Using Generic Delegates". As the title suggests, he wrote a class called “QueuedBackgroundWorker” that would add [...]