Using The Stopwatch To Record The Length Of A Thread.sleep Event?
Nov 10, 2011
I have a control thread that starts up a secondary thread and when the secondary thread finishes, the control thread restarts the secondary thread. On this secondary thread, I use a stopwatch to record a thread.sleep event. Is there any reason, under any circumstance, why the stopwatch elapsed millisecond value (499) would be 1ms less than the sleep time (500 ms)This doesn't happen all the time or even a lot, I'm just curious if there is any physical reason for this to happen.
Currently I'm using System.Threading.Thread.Sleep(5000) to let my app pause/sleep for some time. This works great but I can't open my app anymore when it's sleeping and it uses about 25% of my CPU. I guess there must be a better way to do this. I also tried using a timer but that didn't work out to well for me..
is there anyway to sleep a thread for a "tick". i.e. the tick in StopWatch.ElapsedTick. right now the best i could achieve is this thread.sleep(1). i need it faster
I'm currently trying to code a program which basically uses the stopwatch function to time the length of the users break. Basically when I work at home I want to allow my self 4% of my shift length in personal breaks.
So far I have Public Class Form1 Dim elpsTmr As New Stopwatch Dim ts As TimeSpan = elpsTmr.Elapsed Private Sub txtshiftlength_TextChanged(ByVal sender _ As Object, ByVal e As System.EventArgs) Handles txtshiftlength.TextChanged [Code] .....
The only fields I don't have working are hard ones. I'm trying to figure out how to subtract the length of the last break used from the minutes allowed to take and display it in a text box to display how many minutes you have left to take. And also to work out how many minutes have been used since the program has been opened or reset.
The error is :"Access of shared member, constant member or enum member or nested type through an instance, qualifying expression will not be evaluated"
The code is:
Code: Imports System.IO Imports System.Threading Public Class In_Process
[code]I send the Thread via Thread.Sleep to sleep mode when nothing happens here. Does this affect the TCPListener in his work somehow and what happens to an incomming connection while the Thread is in sleep-mode?
Ok so I have been playing with VB.net and brainstorming ways to accomplish launching a thread reliably every 60 seconds reguardless of how long the prior thread took to do it's work. Here is my question. Given the following code:
[Code]...
My assumption for this output would be that the time between each line would have to be exactly 5000 milliseconds plus the time it takes to execute the rest of the loop which could vary given that there could be an unknown delay due to disk IO. My problem is that looking at lines 10 and 11 and subtracting gives me a difference of 4,958 milliseconds. So my question is what the heck is going on there? How is it possible to get a difference of less than 5000 milliseconds when I have told the thread to sleep for 5000 milliseconds before completing the process. What am I missing?
I am trying to learn how to use Thread.Sleep properly as the main problem I am facing when using it is the fact that the window/form on run time would not move until after the sleep time has elapsed. Did I miss something? Below is a short example of what I want to achieve.
In a WinForms environment, I want to wait a specified amount of time before hiding a user control, but I don't want to freeze the entire UI. I can't kick off to another thread because I have to service the UI components on the thread they were created on. What is the cleanest way to do this?
I have this little application that is using a System.Threading.Thread.Sleep, application runs great but Windows thinks the application is not responding even though it is running.
i have a web browser control, that refreshes pages on a loop after calling a few subs, i need to create a delay in the loop so that the page has a chance to refresh and redisplay before it loops again. i tried the code below, but it seemed to freeze the entire form, elements including, so the web browser didnt refresh before the loop, so how could i create a non form-freezing delay for a loop?
For count = 1 To 20 WebBrowser1.Navigate("URL") simcheckcheck()
I'm looking for a way to pause my application while in a loop without affecting the users ability to control the application, the sleep thread method makes it seem that the app is frozen.
I want to have My.Settings.Delay in seconds not milliseconds adding the 000 for the user. I tried My.Settings.Delay + 0 + 0 + 0. but can't sort how to do this.
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click Dim var As Integer Dim startVal As Integer
The coding that I have a problem with might make people think that I am creating some malware or something stupid. So the project I am doing is associated with iTunes. iTunes allows people to have one library. There is another way, but it is very confusing to some people, and very unreliable. So my project is that I will allow people to have multiple iTunes libraries on one computer. So the problem is this. In order to have an option to choose your library, I gotta make sure that iTunes is not running. So this is the script:
Code: Private Sub CheckAndCloseiTunes() retry: 'Custom class that includes the function to safely close iTunes
[CODE]...
So when I use the Threading.Thread.Sleep(2000) code, the form becomes unresponsive.
The coding that I have a problem with might make people think that I am creating some malware. So the project I am doing is associated with iTunes. iTunes allows people to have one library. There is another way, but it is very confusing to some people, and very unreliable. So my project is that I will allow people to have multiple iTunes libraries on one computer. So the problem is this. In order to have an option to choose your library, I gotta make sure that iTunes is not running.
So this is the script:
Private Sub CheckAndCloseiTunes() retry: 'Custom class that includes the function to safely close iTunes Dim Processes As Process() = Process.GetProcessesByName("iTunes")
[CODE]...
So when I use the Threading.Thread.Sleep(2000) code, the form becomes unresponsive.
I am using a .Net JavaScript implementation called Jurassic to run user-controlled scripts within my .Net 4 WPF application coded in VB.Net - C# answers are fine. The script engine runs on its own thread and provides an API for the script to interact with my application. This all works really nicely until a user executes a script that causes an infinite loop and takes out a core of the processor.
[Code]...
The reason I care about keeping the thread alive is because the user who wrote the script and the user who is running it may not be the same, and I want to keep the experience as smooth as possible the the user running the thread. There also might be legitimate situations in which a single JavaScript function would run for a long time and I do not want to kill that, I just want to stop being allowed to hog the resources.
Solutions that involve stopping the thread from slowing down the system but that still show high CPU usage are not preferable because I do not want the user to wrongly feel that the application is resource intensive.
I am trying to differentiate between sleep and hibernate when I catch a Power Mode changed event and I am quite stuck.
What I am doing currently is I catch this: SystemEvents.PowerModeChanged and get the mode of the PowerModeChangedEventArgs which can be PowerModesSuspend amongst others. My problem is that both sleep and hibernate cause the same event.
I've been trying to use "System.Threading.Thread.Sleep(15)" as the delay code but if freeze the form. I used this "Location.Refresh()" where location is the name of the form, but it didn't give me what I need. This code is going to work on a ProgressBar while typing and the value of the progress bar change while typing. The progress bar jumps to the new value and I want it to move. So I thought about puting it in a "For ... Loop" but the whole form freezes.
I have 5 Picture Boxes, each picture box has an image but all 5 of them has a visibility of false. I have a button, when clicked will show 5 of the images. But showing the 5 images with a delay. So it's going to be
I'm getting an error message when I try and save record data to a file.The error message I recieve says 'Bad Record Length', and highlights the following code - FilePut(filenum, customer)
1. Can someone please explain to me what the error message means?
I am doing a project as part of an external exam, previously i had been using just a variable to store my data. But i kept getting a bad record length error so i switched to a dynamic array but now my project is not looping properly. When i click submit the manually input data by the user is supposed to add to a Dat file and also add to a list box but when i click submit the new information over writes all the previous information that has been input. Here is my
