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POProgress bar value is not synchronized with what gets rendered in windows 7
 

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  1. POProgress bar value is not synchronized with what gets rendered in windows 7
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    <p>It seems that in windows 7, there is some animation that takes place when setting a progress bar's value. Setting the value does not seem to wait for the animation to complete. Is there a way to be notified of when the progress bar has finished animating?</p> <p>I have a sample program. Please see the comments.</p> <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Windows.Forms; using System.Threading; namespace Testing { static class Program { [STAThread] static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); var form = new Form1(); form.Run(); } } public partial class Form1 : Form { public Form1() { InitializeComponent(); } public void Run() { Thread thread = new Thread ( delegate() { ProgressBarMax = 10; ProgressValue = 0; for (int i = 0; i &lt; 10; i++) { Thread.Sleep(1000); ProgressValue++; } } ); EventHandler show = delegate { thread.Start(); }; Shown += show; ShowDialog(); Shown -= show; } public int ProgressBarMax { set { Invoke ( (MethodInvoker) delegate { progressBar1.Maximum = value; } ); } } public int ProgressValue { get { return progressBar1.Value; } set { Invoke ( (MethodInvoker) delegate { label1.Text = value.ToString(); progressBar1.Value = value; // setting the value is not blocking until the // animation is completed. it seems to queue // the animation and as a result a sleep of 1 second // will cause the animation to sync up with the UI // thread. // Thread.Sleep(1000); // this works but is an ugly hack // i need to know if there is a callback to notify me // when the progress bar has finished animating. // then i can wait until that callback is handled // before continuing. // if not, do i just create my own progress bar? } ); } } } } </code></pre> <p>My google kung foo seems to be dead today. Thanks.</p>
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    1. USJulien Lebosquain
    1. USRodolfo Neuber
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    1. COi just want the progress bar's value to be sync-ed up with the other ui components. there are 10 steps, by the time the 10th step is hit, the progress is displaying 90% instead of 100%.
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      1. USRodolfo Neuber
    2. COwhy are you calling form.Run instead of Application.Run(new Form1()); in the main method? things are not going to work in the same way if you do as you are doing... to my understanding Application.Run must be called by a windows forms application, _always_ !!
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      1. POProgress bar value is not synchronized with what gets rendered in windows 7
      1. USDavide Piras
    3. COto davide: this is a sample application to show the issue. the run method could have easily been placed in the program class. i don't really care about Application.Run; i know better. The problem is that the progress bar renders some time after `progressBar1.Value = value;` is set.
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      1. POProgress bar value is not synchronized with what gets rendered in windows 7
      1. USRodolfo Neuber
 

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