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Console progress bar. Code is under the MIT License: http://opensource.org/licenses/MIT
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using System; | |
using System.Threading; | |
static class Program { | |
static void Main() { | |
Console.Write("Performing some task... "); | |
using (var progress = new ProgressBar()) { | |
for (int i = 0; i <= 100; i++) { | |
progress.Report((double) i / 100); | |
Thread.Sleep(20); | |
} | |
} | |
Console.WriteLine("Done."); | |
} | |
} |
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using System; | |
using System.Text; | |
using System.Threading; | |
/// <summary> | |
/// An ASCII progress bar | |
/// </summary> | |
public class ProgressBar : IDisposable, IProgress<double> { | |
private const int blockCount = 10; | |
private readonly TimeSpan animationInterval = TimeSpan.FromSeconds(1.0 / 8); | |
private const string animation = @"|/-\"; | |
private readonly Timer timer; | |
private double currentProgress = 0; | |
private string currentText = string.Empty; | |
private bool disposed = false; | |
private int animationIndex = 0; | |
public ProgressBar() { | |
timer = new Timer(TimerHandler); | |
// A progress bar is only for temporary display in a console window. | |
// If the console output is redirected to a file, draw nothing. | |
// Otherwise, we'll end up with a lot of garbage in the target file. | |
if (!Console.IsOutputRedirected) { | |
ResetTimer(); | |
} | |
} | |
public void Report(double value) { | |
// Make sure value is in [0..1] range | |
value = Math.Max(0, Math.Min(1, value)); | |
Interlocked.Exchange(ref currentProgress, value); | |
} | |
private void TimerHandler(object state) { | |
lock (timer) { | |
if (disposed) return; | |
int progressBlockCount = (int) (currentProgress * blockCount); | |
int percent = (int) (currentProgress * 100); | |
string text = string.Format("[{0}{1}] {2,3}% {3}", | |
new string('#', progressBlockCount), new string('-', blockCount - progressBlockCount), | |
percent, | |
animation[animationIndex++ % animation.Length]); | |
UpdateText(text); | |
ResetTimer(); | |
} | |
} | |
private void UpdateText(string text) { | |
// Get length of common portion | |
int commonPrefixLength = 0; | |
int commonLength = Math.Min(currentText.Length, text.Length); | |
while (commonPrefixLength < commonLength && text[commonPrefixLength] == currentText[commonPrefixLength]) { | |
commonPrefixLength++; | |
} | |
// Backtrack to the first differing character | |
StringBuilder outputBuilder = new StringBuilder(); | |
outputBuilder.Append('\b', currentText.Length - commonPrefixLength); | |
// Output new suffix | |
outputBuilder.Append(text.Substring(commonPrefixLength)); | |
// If the new text is shorter than the old one: delete overlapping characters | |
int overlapCount = currentText.Length - text.Length; | |
if (overlapCount > 0) { | |
outputBuilder.Append(' ', overlapCount); | |
outputBuilder.Append('\b', overlapCount); | |
} | |
Console.Write(outputBuilder); | |
currentText = text; | |
} | |
private void ResetTimer() { | |
timer.Change(animationInterval, TimeSpan.FromMilliseconds(-1)); | |
} | |
public void Dispose() { | |
lock (timer) { | |
disposed = true; | |
UpdateText(string.Empty); | |
} | |
} | |
} |
Wow, this is so nice!
This was much appreciated! Thank you for sharing. :)
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This helped me a lot, thanks for sharing. Cheers.