I'm trying to write something to stop running the code after 15 seconds of running.
I don't want While loop or any kind of loop to be used and would like to use IF-ELSE conditions instead as it would make it easier for me in my code.
The part of code I want to stop being executed after 15 seconds is a FOR loop itself. Let's consider the below code for example:
for (int i = 1; i < 100000; i++)
{
Console.WriteLine("This is test no. "+ i+ "\n");
}
How would you stop this loop after 15 seconds of running?
You can assign DateTime variable before the loop having the current date and time, then in each loop iteration simply check if 15 seconds have passed:
DateTime start = DateTime.Now;
for (int i = 1; i < 100000; i++)
{
if ((DateTime.Now - start).TotalSeconds >= 15)
break;
Console.WriteLine("This is test no. "+ i+ "\n");
}
Update: while the above will usually work, it's not bullet proof and might fail on some edge cases (as Servy pointed out in a comment), causing endless loop. Better practice would be using the Stopwatch class, which is part of System.Diagnostics namespace:
Stopwatch watch = new Stopwatch();
watch.Start();
for (int i = 1; i < 100000; i++)
{
if (watch.Elapsed.TotalMilliseconds >= 500)
break;
Console.WriteLine("This is test no. " + i + "\n");
}
watch.Stop();
I'm posting my answer from my older post because it's more relevant here,
I think you need to measure time and stop the code after particular time say "15 seconds" ,StopWatch class can help you out.
// Create new stopwatch instance
Stopwatch stopwatch = new Stopwatch();
// start stopwatch
stopwatch.Start();
// Stop the stopwatch
stopwatch.Stop();
// Write result
Console.WriteLine("Time elapsed: {0}",stopwatch.Elapsed);
// you can check for Elapsed property when its greater than 15 seconds
//then stop the code
Elapsed property returns TimeSpan instance you would do something like this.
TimeSpan timeGone = stopwatch.Elapsed;
To fit your scenario you can do something like this
Stopwatch stopwatch = new Stopwatch();
TimeSpan timeGone;
// Use TimeSpan constructor to specify:
// ... Days, hours, minutes, seconds, milliseconds.
// ... The TimeSpan returned has those values.
TimeSpan RequiredTimeLine = new TimeSpan(0, 0, 0, 15, 0);//set to 15 sec
While ( timeGone.Seconds < RequiredTimeLine.Seconds )
{
stopwatch.Start();
Start();
timeGone = stopwatch.Elapsed;
}
Stop();//your method which will stop listening
Some useful links
MSDN StopWatch
Better you can use below code, which would help to improve in performance.
System.Threading.Thread.Sleep(TimeSpan.FromSeconds(2));
Related
I have a for loop that is taking way too long and i dont know why.
Stopwatch proctime = new Stopwatch();
Stopwatch innerlooptime = new Stopwatch();
Stopwatch outerlooptime = new Stopwatch();
proctime.Start();
int length = inbtable.Rows.Count;
outerlooptime.Start();
for (int i = 0; i < length; i++)
{
outerlooptime.Stop();
DataRow newrow = graphdata.NewRow();
innerlooptime.Start();
for (int j = 0; j < graphdata.Columns.Count; j++)
{
colname = graphdata.Columns[j].ColumnName;
newrow[j] = inbtable.Rows[i][colname];
}
innerlooptime.Stop();
outerlooptime.Start();
graphdata.Rows.Add(newrow);
}
proctime.Stop();
if you time it all out, the time spent on just the "inner loop" or the j-loop is like 1/10th of a second.
the time spent inside the i loop, but not the j-loop is like 1/10th of a second.
the time spent on the total loop is around 1-second. so Time-iloop + Time-jloop is like 1/5th of the total time. where is the rest of the time being spent? take a look at the image, comparing processing time (proctime in the code), outerloop time and innerloop time. why dont those add up to something much closer to each other?
You don't show the declarations of your timers, but the variable names imply that you are looking at the processor time, not the actual amount of time spend. Processor time is the amount of time spent by the processor core running your calculations - the processor is shared among all the processes running on your computer, so in 1 second, it is perfectly reasonable to receive 0.2 seconds of processor time.
Try using the Stopwatch class instead:
// using System.Diagnostics;
Stopwatch sw = new Stopwatch();
sw.Start();
DoThings(); // run your code
sw.Stop();
Debug.WriteLine("Actual time elapsed: " + sw.Elapsed.ToString());
I figured out the answer. it was really silly. i had the stopwatches switched around in my message box statement at the end of the function, so one stopwatch was being reported as another one. all the time is being spent somewhere else, outside the code i posted. Thanks for all of your help.
My program runs a batch file in cmd.exe, after it finished I want to display a MessageBox to user saying Finished in #.## seconds,
I'm redirecting CMD output to a textbox using process.BeginOutputReadLine(), this is the code I tried:
if (e.Data == null)
{
string time = process.TotalProcessorTime.Seconds.ToString();
MessageBox.Show("Finished in " + time + " seconds");
}
It took about 7-15 seconds to complete the process, but the MessageBox displayed Finished in 0 seconds.
How do I get the accurate time it took to complete in seconds?
Stopwatch watch = new Stopwatch();
watch.Start();
//Do things
watch.Stop();
Text = watch.Elapsed.TotalSeconds.ToString();
Have you tried process.ExitTime.Subtract(process.StartTime).TotalSeconds?
Edited to add: Note that you will get an exception if you try to use this before the process has exited. Per the documentation for ExitTime, use the HasExited property if you have any doubt as to whether this is the case or not.
Could you ultimately do something like this if it makes it easier to read for you
var procTime = DateTime.Now - Process.GetCurrentProcess().StartTime;
var procTimeInSec = procTime.Seconds;
MessageBox.Show(string.Format("Finished in {0} seconds", procTimeInSec));
to access you may want to change the two `var local variables to be accessible from outside the local scope.
below is how you would declare it outside of the local method at the top of the Class
public static TimeSpan procTime = new TimeSpan();
var procTimeInSec, can still be declared in the local scope
Just basic Stopwatch should be enough.
Stopwatch stopWatch = new Stopwatch();
stopWatch.Start();
// run external process, if asynchronous -
//store stopWatch in member variable instead of local
stopWatch.Stop();
TimeSpan ts = stopWatch.Elapsed;
Note that TotalProcessorTime measures CPU usage time, which could very well be 0 seconds for CMD.exe as it really does not do much.
You should look into the Stopwatch class. You'll need to start the stopwatch before your process begins, then stop it afterwards and get the elapsed time.
You should use the Stopwatch class when starting the process.
On the process, add an event handler for the Exited event and when the process is done, stop the stopwatch and retrieve the time.
class Foo
{
Stopwatch watch = new Stopwatch();
public void RunProcess(Process process)
{
process.Exited += new EventHandler(ProcessExit);
process.Start();
watch.Start();
}
public void ProcessExit(object sender, EventArgs e)
{
watch.Stop();
}
}
I need a method that give me the time elapsed awhile my process. I call it at start the process and call it again at finish the process, and the method print the total time elapsed.
This is my method, but always print the time in 00:00. Why is happening this??
public void GetTimeElapsed(string filePath, int logSelected, bool time, IUserOptions userOptions)
{
var stopwatch = new System.Diagnostics.Stopwatch();
LogBinaryWriter BinaryWriter = new LogBinaryWriter();
string timeElapsed = "";
if(time == true)
{
stopwatch.Start();
}
if (time == false)
{
stopwatch.Stop();
TimeSpan timeSpan = stopwatch.Elapsed;
timeElapsed = (string.Format("\nFile Generated: {0}\nTime Elapsed: {1} minute(s) {2} second(s)",
BinaryWriter.CreateLogFileName(filePath, Convert.ToInt32(logSelected)),
timeSpan.Minutes, timeSpan.Seconds, timeSpan.Milliseconds / 10 + "\n"));
userOptions.DisplayUserMessage(timeElapsed);
}
}
Look where you're declaring stopwatch; it's a local variable. That means you're creating and using two different stopwatches; the first one is started when you call the method with a "true" parameter, then disposed of when the method ends and the variable goes out of scope. The second is declared, never started, then its time examined and logged.
To solve the problem, declare an instance variable ("field") for the Stopwatch. That will keep it in scope as long as the object is around, meaning it will keep running after the method ends, and will still be the same instance when you come back to it to stop and examine it.
Your stopwatch variable is local. When you call the function a second time, it's initialized again.
You need to move the declaration up to class level.
System.Diagnostics.Stopwatch stopwatch = new System.Diagnostics.Stopwatch();
public void GetTimeElapsed(string filePath, int logSelected, bool time, IUserOptions userOptions)
{
... etc
You're creating a new stopwatch each time this method is called, but it looks like that should be persistent between method calls.
Take the stopwatch variable declaration outside of the method.
What about using:
var startTime = DateTime.Now;
... your code
var elapsed = DateTime.Now - startTime;
if(time == true)
{
stopwatch.Start();
}
if (time == false)
{
stopwatch.Stop();
...
}
If time is true, you only ever start the stopwatch.
If it is false, you never start it.
A better structure would be:
if(time)
{
stopwatch.Start();
}
... //code to measure here
if (time)
{
stopwatch.Stop();
// log elapsed time
}
Note:
If you have a boolean type, you don't compare it to true or false. Just use it directly and if you want to invert it just use !.
You need to use timeSpan.TotalMinutes instead timestamp.Minutes. Refer timespan documentation
C#
I need to show the time running while the process is doing, shows the seconds increasing, normally: 00:00:01, 00:00:02, 00:00:03..... etc.
I'm using this code:
var stopwatch = new System.Diagnostics.Stopwatch();
stopwatch.Start();
//here is doing my process
stopwatch.Stop();
when the process stop, I show the time ELAPSED, with this:
TimeSpan ts = stopwatch.Elapsed;
...and this:
{0} minute(s)"+ " {1} second(s)", ts.Minutes, ts.Seconds, ts.Milliseconds/10.
this show the total time elapsed, But I need show the time running in console.
How can I do this?
Try
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
while (true)
{
Console.Write(stopwatch.Elapsed.ToString());
Console.Write('\r');
}
UPDATE
To prevent display of milliseconds:
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
while (true)
{
TimeSpan timeSpan = TimeSpan.FromSeconds(Convert.ToInt32(stopwatch.Elapsed.TotalSeconds));
Console.Write(timeSpan.ToString("c"));
Console.Write('\r');
}
If I understand correctly, you are wanting to continually update the timespan on the console while the work is still proceeding. Is that correct? If so, you will need to either do the work in a separate thread, or update the console in a separate thread. One of the best references I've seen for threading is http://www.albahari.com/threading/.
Hope this helps.
I have seen other user posts which show Stopwatch measuring time spent in "Thread.Sleep(5000)" to be around 5000ms.
But my program produces the following results
for (int i = 0; i < 20; ++i)
{
Stopwatch sw = Stopwatch.StartNew();
DateTime start = DateTime.Now;
Thread.Sleep(5000);
sw.Stop();
Console.Out.WriteLine(
"StopWatch Diff:" +
sw.ElapsedMilliseconds.ToString());
Console.Out.WriteLine(
"DateTime Diff:" +
DateTime.Now.Subtract(start).TotalMilliseconds.ToString());
}
StopWatch Diff:1684
DateTime Diff:5262.592
StopWatch Diff:1625
DateTime Diff:4997.12
StopWatch Diff:1604
DateTime Diff:4997.12
StopWatch Diff:1601
DateTime Diff:4997.12
StopWatch Diff:1690
DateTime Diff:4997.12
StopWatch Diff:1603
Is it just me who is observing this behaviour? Why stopwatch measures 1.6 seconds when 5 seconds have actually passed. It is the time that the thread is actually running?
The Stopwatch class is not reliable.
This is unreliable on processors that do not have a constant clock speed (most processors can reduce the clock speed to conserve energy). This is explained in detail here.