C# Progressbar is not updated accurately in Vista or Windows7

public partial class Form1 : Form
{
  //....
  private void timer1_Tick(object sender, EventArgs e)
  {
     if (this.progressBar1.Value >= 100)
     {
         this.timer1.Stop();
         this.timer1.Enabled = false;
     }
     else
     {
         this.progressBar1.Value += 10;
         this.label1.Text = Convert.ToString(this.progressBar1.Value);                
     }
  }
  //......
}

Here I used a timer to update the progress bar value. It works fine in XP. But in Windows7 or Vista when the progress value is set to say 100 but the graphical progress is not 100!

Searching some threads found that its for animation lag in Vista/Wi开发者_JAVA百科ndows7.

How to get rid of this thing?

I don't want to loose the look and feel of Vista/Window7 using:

SetWindowTheme(progressBar1.Handle, " ", " ");

I had the same problem. Fozi's tipps was helping me. The solution from Samir will work fine unless the maximum (100%). To make this work also for 100% the maximum must be increased before. The following worked fine for me.

if (NewValue < progressBar.Maximum)
{
  progressBar.Value = NewValue + 1;
  progressBar.Value--;
}
else
{
  progressBar.Maximum++;
  progressBar.Value = progressBar.Maximum;
  progressBar.Value--;
  progressBar.Maximum--;
}

This is just how the stupid progress bars work in Vista and later.

There is no fix.

Complain to Microsoft.

  private void timer1_Tick(object sender, EventArgs e)
    {

        if (progressBar1.Maximum == 1) progressBar1.Maximum = 100;
        if (progressBar1.Value==100) {
            progressBar1.Value = 0;
            return;
        }
        progressBar1.Increment(1);
        if (progressBar1.Value == 100) {
            progressBar1.Value = 1; progressBar1.Maximum = 1;
            progressBar1.Update();
        }
    }

These are my tricks to tackle the win7 problem with proper full scale paint of the progressbar.

public partial class Form1 : Form
{
  //....
  private void timer1_Tick(object sender, EventArgs e)
  {
    if (this.progressBar1.Value >= 100)
    {
     this.timer1.Stop();
     this.timer1.Enabled = false;
    }
    else
    {
      int tempValue = this.progressBar1.Value + 10;
      if (tempValue < 100 && tempValue >=0 )
      {
       this.progressBar1.Value = tempValue + 1;
       this.progressBar1.Value = tempValue;
      }
      else if (tempValue >= 100)
      {
       this.progressBar1.Value = 100;
       this.progressBar1.Value = 99;
       this.progressBar1.Value = 100;
      }
     this.label1.Text = Convert.ToString(this.progressBar1.Value);                
    }
  }

//......
}

The else part makes the progress bar looks OK now. But there should have been some standard way for progress bars. The idea is from from Fozi's comment here