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1. #Timers.timer vs threading.timer vs filewatcher code
2. #Timers.timer vs threading.timer vs filewatcher download
3. #Timers.timer vs threading.timer vs filewatcher windows

This can cause unexpected behaviors and make debugging difficult. If Application.DoEvents is called from your code, your program flow may be interrupted in order to process the timer events generated by an instance of this class. This can alter the expected path of execution that I just mentioned. Application.DoEvents yields control to the UI message pump, allowing all pending events to be processed. Just like with Visual Basic, calling Application.DoEvents from the.

#Timers.timer vs threading.timer vs filewatcher windows

NET, you probably know that in a Windows-based application the only way to allow the UI thread to respond to Windows messages while executing in an event handler is to call the Application.DoEvents method.

#Timers.timer vs threading.timer vs filewatcher code

If you wrote Visual Basic code prior to Visual Studio. The UI thread processes these messages whenever your application isn't busy doing something else. This includes Windows API messages as well as the Tick events raised by this timer class. During idle time, the UI thread is also responsible for processing all messages in the application's Windows message queue. Just like the rest of the code in a typical Windows Forms application, any code that resides inside a timer event handler (for this type of timer class) is executed using the application's UI thread. This means that application code that is executing will never be preempted by an instance of this timer class (assuming you don't call Application.DoEvents). The timer events raised by this timer class are synchronous with respect to the rest of the code in your Windows Forms app. If you're looking for a metronome, you've come to the wrong place.

#Timers.timer vs threading.timer vs filewatcher download

You can download the complete code from the link at the top of this article and experiment with it. This application will help you gain a clear understanding of each of the timer classes. Figure 2 shows a screenshot of the sample application that I will be referring to throughout this article.

Later I'll explore the more advanced class. These two classes have a very similar object model. It is somewhat more complicated but provides a higher level of control, as you will see later in this article.

The class does not appear on the Visual Studio. NET when you're working on a class that derives from (as is the case when you're working with Windows services). The component class designer is used by Visual Studio. NET toolbox, you can safely use this timer with either the Windows Forms designer or the component class designer. This control creates an instance of the class. The timer control that is located on the Components tab can be safely used in any class. NET handle the plumbing or you can manually instantiate and initialize the class yourself. Like all other controls in the toolbox, you can either let Visual Studio. This control will place an instance of the class on your form. Use the timer control that is located under the Windows Forms tab only if the target is a Windows Forms designer. It is very easy to use the wrong one, or worse yet, to not even realize that they are different. NET toolbox has a timer control on both the Windows Forms tab and the Components tab (see Figure 1). If you're not careful, this is where trouble can begin. NET toolbox window, allowing you to drag and drop both of these timer controls directly onto a Windows Forms designer or a component class designer. The first two classes appear in the Visual Studio®. There are three different timer classes in the.

NET Framework arms you with the tools you need to tackle each of these scenarios. In the past, timers have even allowed developers who use Visual Basic® to simulate multitasking.Īs you would expect, the Microsoft. Some of the most common uses of timers are to start a process at a regularly scheduled time, to set intervals between events, and to maintain consistent animation speeds (regardless of processor speed) when working with graphics. Timer objects in Microsoft® Windows® allow you to control when actions take place. This article examines the three timer classes and helps you gain an understanding of how and when each class should be used. Each of these classes has been designed and optimized for use in different situations. NET Framework Class Library provides three different timer classes:, , and. Writing effective timer-driven managed code requires a clear understanding of program flow and the subtleties of the. Timers often play an important role in both client applications and server-based components (including Windows services). This article assumes you're familiar with C# NET Framework Class LibraryĬode download available at: TimersinNET.exe(126 KB)