Strange behaviour in a program that use ListView

The software that I'm developing in C # using SharpDevelop behaves in a strange way. I'll try to describe it briefly, although I know that it will not be easy.
I have a window in which I have three ListView. Clicking on a button through a for loop I populate these three ListView with simple text strings coming from a List already populated. The filling and the display is not immediate. In fact, I want each row to appear every few milliseconds, and for this I use System.Threading.Thread.Sleep.
Well, when I run the software from making within the development environment, it behaves the way I want without any problem, but when I run the software on the outside, simply by double-clicking the executable, when I press the button to show the contents of the ListView, a strange thing happens,… the ListView began to be populated, and the lines began to compare on the screen according to the delay set by me, then at a certain point the program seems like it locks... in the listview doesn't appear anything and the only thing I see is the mouse cursor letting me know that the program is working. In fact, the program has not crashed, is continuing to follow the instructions and only when it arrives at the end of the for loop becomes available again and shows the listview filled with all the remaining strings. The problem is that, for example, from the string 21 to 200 I have not seen any row appearing on the screen as I wanted.

What could be the explanation for this strange behaviour? Does anyone have any idea on how to solve it?

Ok, here I report part of the code of the program:

// This is the function that I call when I click on the button that will populate the listview
void BtSimClick(object sender, EventArgs e)
{
...
// this is the struct that contain the List with all the information that I will show in the ListView
FinalScore=new Match();
...
// Now I call the function that will populate the ListView
ShowBestAction(FinalScore);
...
}

//This is the function that populate the ListView
private void ShowBestAction(Match Partita)
{
            listViewHomeScorers.Items.Clear();
            listViewVisitorsScorers.Items.Clear();
            listViewMatch.Items.Clear();
            listViewBestActions.Items.Clear();

            Score Rete=new Score();
            int Hgoal=0; int Vgoal=0;

            for (int i=0;i            {
                switch (Partita.Cronaca[i].GetCommentaryType())
                {
                    case 0:
                    {
                        listViewBestActions.Items.Clear();
                        ...
                        for (int j=conta-1;j>=0;j--)
                        {
                            ListViewItem item=new ListViewItem(Partita.Cronaca[i-       j].GetCommentaryMinute().ToString(),Partita.Cronaca[i-j].GetCommentaryType());
                            item.SubItems.Add(Partita.Cronaca[i-j].GetCommentaryText());
                            listViewBestActions.Items.Add(item);
                            if (listViewBestActions.Items.Count>1) listViewBestActions.EnsureVisible(listViewBestActions.Items.Count-1);
                            listViewBestActions.Update();
                            System.Threading.Thread.Sleep(1000/trackbarVelocity.Value);
                        }
                        break;
                    }
                    case 1:
                    {
                        listViewBestActions.Items.Clear();
                        ...
                        for (int j=conta-1;j>=0;j--)
                        {
                            ListViewItem item=new ListViewItem(Partita.Cronaca[i-j].GetCommentaryMinute().ToString(),Partita.Cronaca[i-j].GetCommentaryType());
                            item.SubItems.Add(Partita.Cronaca[i-j].GetCommentaryText());
                            listViewBestActions.Items.Add(item);
                            if (listViewBestActions.Items.Count>1) listViewBestActions.EnsureVisible(listViewBestActions.Items.Count-1);
                            listViewBestActions.Update();
                            System.Threading.Thread.Sleep(1000/trackbarVelocity.Value);
                        }
                        break;
                    }
                    case 2:
                    {
                        listViewBestActions.Items.Clear();
                        ...
                        for (int j=conta-1;j>=0;j--)
                        {
                            ListViewItem item=new ListViewItem(Partita.Cronaca[i-j].GetCommentaryMinute().ToString(),Partita.Cronaca[i-j].GetCommentaryType());
                            item.SubItems.Add(Partita.Cronaca[i-j].GetCommentaryText());
                            listViewBestActions.Items.Add(item);
                            if (listViewBestActions.Items.Count>1) listViewBestActions.EnsureVisible(listViewBestActions.Items.Count-1);
                            listViewBestActions.Update();
                            System.Threading.Thread.Sleep(1000/trackbarVelocity.Value);
                        }
                        break;
                    }
                    case 3:
                    {
                        listViewBestActions.Items.Clear();
                        ...
                        for (int j=conta-1;j>=0;j--)
                        {
                            ListViewItem item=new ListViewItem(Partita.Cronaca[i-j].GetCommentaryMinute().ToString(),Partita.Cronaca[i-j].GetCommentaryType());
                            item.SubItems.Add(Partita.Cronaca[i-j].GetCommentaryText());
                            listViewBestActions.Items.Add(item);
                            if (listViewBestActions.Items.Count>1) listViewBestActions.EnsureVisible(listViewBestActions.Items.Count-1);
                            listViewBestActions.Update();
                            System.Threading.Thread.Sleep(1000/trackbarVelocity.Value);
                        }
                        break;
                    }
                    case 4: break;
                    case 5:
                    {
                        listViewBestActions.Items.Clear();
                        ...
                        for (int j=conta-1;j>=0;j--)
                        {
                            ListViewItem item=new ListViewItem(Partita.Cronaca[i-j].GetCommentaryMinute().ToString(),Partita.Cronaca[i-j].GetCommentaryType());
                            item.SubItems.Add(Partita.Cronaca[i-j].GetCommentaryText());
                            listViewBestActions.Items.Add(item);
                            if (listViewBestActions.Items.Count>1) listViewBestActions.EnsureVisible(listViewBestActions.Items.Count-1);
                            listViewBestActions.Update();
                            System.Threading.Thread.Sleep(1000/trackbarVelocity.Value);
                        }
                        break;
                    }
                    case 6: break;
                    case 7: break;
                      case 8:
                    {
                        listViewBestActions.Items.Clear();
                          ...
                        for (int j=conta-1;j>=0;j--)
                        {
                            ListViewItem item=new ListViewItem(Partita.Cronaca[i-j].GetCommentaryMinute().ToString(),Partita.Cronaca[i-j].GetCommentaryType());
                            item.SubItems.Add(Partita.Cronaca[i-j].GetCommentaryText());
                            listViewBestActions.Items.Add(item);
                            if (listViewBestActions.Items.Count>1) listViewBestActions.EnsureVisible(listViewBestActions.Items.Count-1);
                            listViewBestActions.Update();
                            System.Threading.Thread.Sleep(1000/trackbarVelocity.Value);
                        }
                        break;
                    }
                    case 9:
                    {
                    listViewBestActions.Items.Clear();
                        ...
                        for (int j=conta-1;j>=0;j--)
                        {
                            ListViewItem item=new ListViewItem(Partita.Cronaca[i-j].GetCommentaryMinute().ToString(),Partita.Cronaca[i-j].GetCommentaryType());
                            item.SubItems.Add(Partita.Cronaca[i-j].GetCommentaryText());
                            listViewBestActions.Items.Add(item);
                            if (listViewBestActions.Items.Count>1) listViewBestActions.EnsureVisible(listViewBestActions.Items.Count-1);
                            listViewBestActions.Update();
                            System.Threading.Thread.Sleep(1000/trackbarVelocity.Value);
                        }
                        ...
                        for (int j=1;j                        {
                            ListViewItem item=new ListViewItem(Partita.Cronaca[i+j].GetCommentaryMinute().ToString(),Partita.Cronaca[i+j].GetCommentaryType());
                            item.SubItems.Add(Partita.Cronaca[i+j].GetCommentaryText());
                            listViewBestActions.Items.Add(item);
                            if (listViewBestActions.Items.Count>1) listViewBestActions.EnsureVisible(listViewBestActions.Items.Count-1);
                            listViewBestActions.Update();
                            ...
                            System.Threading.Thread.Sleep(1000/trackbarVelocity.Value);
                        }
                        ...
                        break;
                    }
                }
            }
        }

I hope that this will clear you what I did. If you have more question don't hesitate to ask me.

4 Replies

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pixel pix14y ago
Ok, here I report part of the code of the program:

// This is the function that I call when I click on the button that will populate the listview
void BtSimClick(object sender, EventArgs e)
{
...
// this is the struct that contain the List with all the information that I will show in the ListView
FinalScore=new Match();
...
// Now I call the function that will populate the ListView
ShowBestAction(FinalScore);
...
}

//This is the function that populate the ListView
private void ShowBestAction(Match Partita)
{
            listViewHomeScorers.Items.Clear();
            listViewVisitorsScorers.Items.Clear();
            listViewMatch.Items.Clear();
            listViewBestActions.Items.Clear();

            Score Rete=new Score();
            int Hgoal=0; int Vgoal=0;

            for (int i=0;i            {
                switch (Partita.Cronaca[i].GetCommentaryType())
                {
                    case 0:
                    {
                        listViewBestActions.Items.Clear();
                        ...
                        for (int j=conta-1;j>=0;j--)
                        {
                            ListViewItem item=new ListViewItem(Partita.Cronaca[i-       j].GetCommentaryMinute().ToString(),Partita.Cronaca[i-j].GetCommentaryType());
                            item.SubItems.Add(Partita.Cronaca[i-j].GetCommentaryText());
                            listViewBestActions.Items.Add(item);
                            if (listViewBestActions.Items.Count>1) listViewBestActions.EnsureVisible(listViewBestActions.Items.Count-1);
                            listViewBestActions.Update();
                            System.Threading.Thread.Sleep(1000/trackbarVelocity.Value);
                        }
                        break;
                    }
                    case 1:
                    {
                        listViewBestActions.Items.Clear();
                        ...
                        for (int j=conta-1;j>=0;j--)
                        {
                            ListViewItem item=new ListViewItem(Partita.Cronaca[i-j].GetCommentaryMinute().ToString(),Partita.Cronaca[i-j].GetCommentaryType());
                            item.SubItems.Add(Partita.Cronaca[i-j].GetCommentaryText());
                            listViewBestActions.Items.Add(item);
                            if (listViewBestActions.Items.Count>1) listViewBestActions.EnsureVisible(listViewBestActions.Items.Count-1);
                            listViewBestActions.Update();
                            System.Threading.Thread.Sleep(1000/trackbarVelocity.Value);
                        }
                        break;
                    }
                    case 2:
                    {
                        listViewBestActions.Items.Clear();
                        ...
                        for (int j=conta-1;j>=0;j--)
                        {
                            ListViewItem item=new ListViewItem(Partita.Cronaca[i-j].GetCommentaryMinute().ToString(),Partita.Cronaca[i-j].GetCommentaryType());
                            item.SubItems.Add(Partita.Cronaca[i-j].GetCommentaryText());
                            listViewBestActions.Items.Add(item);
                            if (listViewBestActions.Items.Count>1) listViewBestActions.EnsureVisible(listViewBestActions.Items.Count-1);
                            listViewBestActions.Update();
                            System.Threading.Thread.Sleep(1000/trackbarVelocity.Value);
                        }
                        break;
                    }
                    case 3:
                    {
                        listViewBestActions.Items.Clear();
                        ...
                        for (int j=conta-1;j>=0;j--)
                        {
                            ListViewItem item=new ListViewItem(Partita.Cronaca[i-j].GetCommentaryMinute().ToString(),Partita.Cronaca[i-j].GetCommentaryType());
                            item.SubItems.Add(Partita.Cronaca[i-j].GetCommentaryText());
                            listViewBestActions.Items.Add(item);
                            if (listViewBestActions.Items.Count>1) listViewBestActions.EnsureVisible(listViewBestActions.Items.Count-1);
                            listViewBestActions.Update();
                            System.Threading.Thread.Sleep(1000/trackbarVelocity.Value);
                        }
                        break;
                    }
                    case 4: break;
                    case 5:
                    {
                        listViewBestActions.Items.Clear();
                        ...
                        for (int j=conta-1;j>=0;j--)
                        {
                            ListViewItem item=new ListViewItem(Partita.Cronaca[i-j].GetCommentaryMinute().ToString(),Partita.Cronaca[i-j].GetCommentaryType());
                            item.SubItems.Add(Partita.Cronaca[i-j].GetCommentaryText());
                            listViewBestActions.Items.Add(item);
                            if (listViewBestActions.Items.Count>1) listViewBestActions.EnsureVisible(listViewBestActions.Items.Count-1);
                            listViewBestActions.Update();
                            System.Threading.Thread.Sleep(1000/trackbarVelocity.Value);
                        }
                        break;
                    }
                    case 6: break;
                    case 7: break;
                      case 8:
                    {
                        listViewBestActions.Items.Clear();
                          ...
                        for (int j=conta-1;j>=0;j--)
                        {
                            ListViewItem item=new ListViewItem(Partita.Cronaca[i-j].GetCommentaryMinute().ToString(),Partita.Cronaca[i-j].GetCommentaryType());
                            item.SubItems.Add(Partita.Cronaca[i-j].GetCommentaryText());
                            listViewBestActions.Items.Add(item);
                            if (listViewBestActions.Items.Count>1) listViewBestActions.EnsureVisible(listViewBestActions.Items.Count-1);
                            listViewBestActions.Update();
                            System.Threading.Thread.Sleep(1000/trackbarVelocity.Value);
                        }
                        break;
                    }
                    case 9:
                    {
                    listViewBestActions.Items.Clear();
                        ...
                        for (int j=conta-1;j>=0;j--)
                        {
                            ListViewItem item=new ListViewItem(Partita.Cronaca[i-j].GetCommentaryMinute().ToString(),Partita.Cronaca[i-j].GetCommentaryType());
                            item.SubItems.Add(Partita.Cronaca[i-j].GetCommentaryText());
                            listViewBestActions.Items.Add(item);
                            if (listViewBestActions.Items.Count>1) listViewBestActions.EnsureVisible(listViewBestActions.Items.Count-1);
                            listViewBestActions.Update();
                            System.Threading.Thread.Sleep(1000/trackbarVelocity.Value);
                        }
                        ...
                        for (int j=1;j                        {
                            ListViewItem item=new ListViewItem(Partita.Cronaca[i+j].GetCommentaryMinute().ToString(),Partita.Cronaca[i+j].GetCommentaryType());
                            item.SubItems.Add(Partita.Cronaca[i+j].GetCommentaryText());
                            listViewBestActions.Items.Add(item);
                            if (listViewBestActions.Items.Count>1) listViewBestActions.EnsureVisible(listViewBestActions.Items.Count-1);
                            listViewBestActions.Update();
                            ...
                            System.Threading.Thread.Sleep(1000/trackbarVelocity.Value);
                        }
                        ...
                        break;
                    }
                }
            }
        }

I hope that this will clear you what I did. If you have more question don't hesitate to ask me.
Nitesh Kejriwal14y ago
OK..If you're using only the main thread, it should not create issues. However, it would be good if you can provide with some code.
pixel pix14y ago
To respond quickly to the demand ... All takes place in the main thread. I didn't use different threads. My intention is just to slow for a time x the execution of the function that populates the listview. To do this I read on the net that the best function to use was just System.Threading.Thread.Sleep().

However, unfortunately in this moment I have not much time... maybe tomorrow I'll post part of the code in order to show better what I do.
Nitesh Kejriwal14y ago
Based on what I have understood from the question - Since you are using Threading, it is really based on the available of resources and thread allocation as to when the threaded code gets executed. Are you trying to sleep the main thread or using a different thread to fill the listviews?