CODEWITHSUNDEEP
c#for-loop
RePRO
RePRO

Reputation: 263

How to show the value of FOR LOOP every second C#

Good day, it can be the easy question (for everyone) but I don't know how to solve that.

Simple question - simple answer.

If I have this code:

public void test()
{
      for (int i = 0; i < 10000; i++)
      {
          label1.Text = i.ToString();
      }
}

If I will call the test method, it writes to me 9999 (surely). I need show on label the variable i every second of this loop. I do not want to use a timer - but you can show me a solution with Timer.

What is the easiest way to show LOOP? Excuse me for my English, nice day.

Upvotes: 0

Views: 4829

Answers (4)

Govind Malviya
Govind Malviya

Reputation: 13743

Not good way but you can use:

public void test()
{
      for (int i = 0; i < 10000; i++)
      {
          System.Threading.Thread.Sleep(1000);
          label1.Text = i.ToString();
      }
}

Upvotes: 0

Travis J
Travis J

Reputation: 82267

sweet and simple

DateTime start= DateTime.Now;
for(int i = 0; i < 10000; i++)
{
 DateTime end = DateTime.Now;
 if( start.Second != end.Second )
 {
  start = end;
  label1.Text = i.ToString();
 }
}

EDIT

This will allow you see the difference. Set a breakpoint after the loop runs and you will see the array of iz filled with i values. The first one on my machine was at 150000

        List<string> iz = new List<string>();
        DateTime start = DateTime.Now;
        for (int i = 0; i < 10000000; i++)
        {
            int zz = 5000;
            int yy = zz / (1 +i);
            zz = yy * i;
            DateTime end = DateTime.Now;
            if (start.Second != end.Second)
            {
                start = end;
                iz.Add(i.ToString());
            }
        }

Upvotes: 0

Nikhil Agrawal
Nikhil Agrawal

Reputation: 48558

MyLabel.Text = i.ToString();
Thread.Sleep(1000);

Upvotes: 1

Pavel Krymets
Pavel Krymets

Reputation: 6293

Use BackgroundWoker class, and it's method ReportProgress, do get desired behaviour without locking UI.

void backgroundWoker_DoWork(....)
{
      for (int i = 0; i < 10000; i++)
      {
          backgroundWoker.ReportProgress(0,i.ToString());
          Thread.Sleep(1000);
      }

}

void backgroundWoker_ProgressChanged(....)
{
     label1.Text = e.UserState.ToString();
}

Upvotes: 1

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