Virtuemart is my choice for shopping cart. It can integrate with Joomla. But that only supported Joomla 1.5 before, even version 1.7 is the market for a few months. Yesterday, I saw there is Virtuemart 2.0, which supports Joomla 1.7. That is great!
Please click here to download Virtuemart.
Wikipedia will back down soon. They will shutdown on 05.00 UTC , today(18/1/2012), for 24 hours. That is protesting Protect IP Act in US.Please find the further details in here.
This tutorial is to build a simple Windows Services.
1. Create a Windows Service Project, File->New->Project
2. Please add these codes into Services1.cs
Code:
protected override void OnStart(string[] args) | |
{ | |
EventLog.WriteEntry("Example Start"); | |
System.Timers.Timer timer1 = new System.Timers.Timer(); | |
timer1.Enabled = true; | |
timer1.Interval = 60000; | |
timer1.Elapsed += new System.Timers.ElapsedEventHandler(timer1_Elapsed); | |
timer1.Start(); | |
} | |
| |
void timer1_Elapsed(object sender, System.Timers.ElapsedEventArgs e) | |
{ | |
EventLog.WriteEntry("Timer Triggered:"+DateTime.Now.ToString()); | |
} | |
| |
protected override void OnStop() | |
{ | |
EventLog.WriteEntry("Example Stop"); | |
} |
I got a same WhatsApp message from a number of friends. The message is about WhatsApp will charge for their service unless you are a frequent user. And it asks you to forward that message to 10 people. I checked the official blog of WhatsApp. That is not truth, the message is a hoax. If you get that message, please do not forward that!!!
Reference
Official blog of WhatsApp
There are a number of ways to create a pdf file by using open source software. For example, openoffice can export their document files into PDF. But How's about others file type? For example, how can I export a web page into PDF?
I found the best way is getting a PDF Printer driver. I just need to open the file and print it into a PDF Printer. Then it will "print" into a pdf file. I am using PDFCreator to do this task. It is free and opensource.
In the Java World, we have a set of library, Commons, from Apache. They provide a lot of cores functions such as email, logging and validations. In our .Net World, the open source community build a set of Commons Library. They provide a lot of cores functions, such as ORM, CSV Parser and validations. Those are different from the java version. Anyway, there are a strong set of functions. They are useful for building your own web framework. Such as, Logging and CSV Parser are essential functions for a web framework.
Previously, I used "Joo ReCaptcha". That is very a good plug-in. But ReCaptcha got a bug in IE. When its captcha text field will disappear when I use jQuery.blur() or focus(). I used superfish menu. It used these two jQuery methods a lot. When I show the sub-menu, then captcha text field will disappear. I have spent a day to fix it but I cannot find a solution or work around.
Thus, I gave it up. I used another Captcha Plug-in which is not using ReCaptcha. That is OSOLCaptcha. This is very similar with ReCaptcha, but it can convert captcha text to speech. This may be some accessibility issue. Besides of this, that is very similar with Joo ReCaptcha. You just need to install the plug-in, then it will works in Contact form, login and register form. That is good.
Related post:
Good captcha plug-in in Joomla
Wordpress 3.3.1 is released. That is only a security and maintenance update. That is not much update! Please click here to download the latest version or use the update function in your wordpress dashboard.
I got a lot of error from a LINQ DataContext, such as "Invalid attempt to call Read when reader is closed" . That is because I was using a singleton for DataContext in a multi-threads.
The codes like that:
Code:
private static ExampleDataContext Context; | |
private static ExampleDataContext GetContext() | |
{ | |
if(Context == null) | |
{ | |
Context = new ExampleDataContext(); | |
} | |
return Context; | |
} |
That is not very thread-safe. A thread will close the DataContext, but others threads are still using DataContext. Then it will throw the error above.
I changed the DataContext in a pre-thread. I initialize the DataContext in each thread. The errors are gone! You also can do the DataContext in a pre-object. That is simpler.
I have written an example project in C#. This example will shows how to use Mutex Lock. Moreover, it will demonstrate how to create a thread with parameters. Please click here to download.
I am implementing a Windows Service. I did a foolish mistake. I opened the design view of windows service and drag-and-drop the Timer from toolbar. Because I need the windows service to execute some code periodically. I found the timer won't triggered at all. I found that is Timer in Windows.Forms. It never works in Windows Service. You need to create a timer of System.Timers. Like the example following:
Code:
System.Timers.Timer timer2 = new System.Timers.Timer(); | |
timer2.Interval = 10000; | |
timer2.Enabled = true; | |
timer2.Elapsed += new System.Timers.ElapsedEventHandler(timer2_Elapsed); |
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