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POWhile loop causes the app to go slow? Any idea why?
 

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    <p>I have a simple code that looks up a text file, reads the line of text, splits the string by semi-colons and then posts the results.</p> <p>After it has done this, I have created a really simple while loop to waste 10 seconds before going for it again.... here is the code:</p> <pre><code>Private Sub checkTemps() While Abort = False Try fileReader = New StreamReader(directory.Text &amp; "currentTemp.dat") rawData = fileReader.ReadLine() fileReader.Close() Dim dataArray() As String dataArray = rawData.Split(";") updateOutput("1", dataArray(0), dataArray(1)) updateOutput("2", dataArray(2), dataArray(3)) updateOutput("3", dataArray(4), dataArray(5)) updateOutput("4", dataArray(6), dataArray(7)) stpWatch.Start() While stpWatch.Elapsed.Seconds &lt; 10 And Abort = False pollInterval(stpWatch.ElapsedMilliseconds) End While stpWatch.Stop() stpWatch.Reset() Catch ex As Exception msgbox("oops!") End Try End While closeOnAbort() End Sub </code></pre> <p>But when it gets to the "time-wasting" loop - it seems to slow the whole application down? And I can't work out why!</p> <p>So a couple of questions... is there a better way to do all this? and second - can anyone spot a problem?</p> <p>All the other commands seem to run fine - there isn't much else to this app. I have another program that updates the dat file with the values, this is simply a client side app to output the temperatures.</p> <p>Any help would be appreciated.</p> <p>Andrew</p> <hr> <p>More info:</p> <p>I should explain what the pollInterval sub does!</p> <pre><code>Private Delegate Sub pollIntervalDelegate(ByVal value As Integer) Private Sub pollInterval(ByVal value As Integer) If Me.InvokeRequired Then Dim upbd As New pollIntervalDelegate(AddressOf pollInterval) Me.Invoke(upbd, New Object() {value}) Else ProgressBar1.Value = value End If End Sub </code></pre>
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    1. COSee also, on a related note, http://stackoverflow.com/questions/1664526/loop-to-check-time-in-vb-net
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