frm.show() hangs the application

Question

4.00/5 (1 vote)

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Hi,

i have an application which has three modules Conversion,testing and editing of a file. Application works fine for one or two flow like

1st flow: Conversion>>testing>>editing
2nd flow : testing>>editing

But after that flow, the application get hanged in "Testing" module. It does not throw any error. I debug the code and find that it hangs at the call of frm.Show().

Please help.

Thanks and Regards,
Jaya Joshi

Code Is:

C#

private void trDashBoard_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            try
            {
                TreeView tree = (TreeView)sender;
                TreeViewItem trvItem = ((TreeViewItem)tree.SelectedItem);
                if (trvItem == null)
                    return;
                if (trvItem.Tag.ToString() == "ADMINISTRATOR" || trvItem.Tag.ToString() == "PROOF READER" || trvItem.Tag.ToString() == "CONVERTOR" || trvItem.Tag.ToString() == "EDITOR")
                    return;
                else
                {
                    TreeViewItem trparent = ((TreeViewItem)trvItem.Parent);
                    if (trparent.Tag.ToString() == "PROOF READER")
                    {
                        Testing frm = new Testing(trvItem.Tag.ToString(),true);
                        frm.Owner = this.Owner;
                        frm.WindowStartupLocation = System.Windows.WindowStartupLocation.Manual;
                   
                        frm.Top =this.Top ;
                       frm.Left = this.Left;
                       System.Threading.Thread.Sleep(500);
                        frm.Show();
                        this.Close();
                    }
                    else if (trparent.Tag.ToString() == "EDITOR")
                    {
                        Editor frmEdit = new Editor(trvItem.Tag.ToString(),true);
                        frmEdit.Owner = this.Owner;
                        frmEdit.WindowStartupLocation = System.Windows.WindowStartupLocation.Manual;
                        frmEdit.Top = this.Top;
                        frmEdit.Left = this.Left;
                        frmEdit.Show();                        
                       this.Close();
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("Application Error. /n"+ ex.Message+ "/n" + ex.Source  + "/n" +ex.StackTrace);
            }
        }

Posted 5-Dec-11 22:15pm

jaya_11

Updated 6-Dec-11 1:26am

#realJSOP

v3

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Comments

Balakrishnan Dhinakaran 6-Dec-11 4:19am

pls display the code so that it will be easy to identify the error

[no name] 6-Dec-11 4:49am

EDIT: added code block

Addy Tas 6-Dec-11 9:28am

Hi,

Does the Testing form have a event that fires when / before it is shown? e.g. resize? If so; does it hang in that event?

jaya_11 12-Dec-11 1:18am

No event is fired. it hangs at frm.show() method

3 solutions

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Navneet1sep · Answer 1 · 2011-12-06T01:38:00

Hi

I think your problem is your code not work properly see here..

Quote:
System.Threading.Thread.Sleep(500);
frm.Show();
this.Close();
}
else if (trparent.Tag.ToString() == "EDITOR")
{
Editor frmEdit = new Editor(trvItem.Tag.ToString(),true);
frmEdit.Owner = this.Owner;
frmEdit.WindowStartupLocation = System.Windows.WindowStartupLocation.Manual;
frmEdit.Top = this.Top;
frmEdit.Left = this.Left;
frmEdit.Show();
this.Close();

hi in that where use System.Threading.Thread.Sleep(500);
it not execute upper code..so try to call one stop function Like..

C#

Public Void Stop()
{
 System.Threading.Thread.Sleep(500);
}

and call this instead of Thread.Sleep().

IT works...

Addy Tas · Answer 2 · 2011-12-12T10:24:00

Hi,

I've been giving the same a try (on forms rather than wpf but most is the same) and did find one small issue here;

first you set

Quote:
Editor frmEdit = new Editor(trvItem.Tag.ToString(),true);
frmEdit.Owner = this.Owner;

then a couple of lines later:

Quote:
this.Close();

If you close the owner of the form you kind of ruin its day...
If you don't wat to see the owner anymore I suggest that you hide it.

Let me know if I got it right, if not i'll spend a bit more time on it

Cheers,

AT

jaya_11 · Answer 3 · 2012-03-21T02:40:00

Solution 5

Hi,

My problem get resolved using singleton pattern.

Instead of closing the forms/Window, hide the form. The windows are closed only when application is closing.

Thanks and Regards,
Jaya Joshi

Posted 21-Mar-12 2:40am

jaya_11

frm.show() hangs the application

3 solutions

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