Solved

Help needed with MouseDoubleClick-event of the Listview.

Posted on 2012-04-12
9
384 Views
Last Modified: 2012-04-13
Hi,

I am programming in C# and I use VS2010.

I want to make an application just like the Notes-part of Microsoft Outlook.
So I have a mainForm with a Listview on it called lvNotes and a button. When
a user presses that button a form appears called StickyNotes that has a text-
box on it. When the user put some text in it and presses the close-button of
the StickyNotes form a new row will be created in the Listview with the text
that the user had entered in the textbox.

Thanks to the solution of Idle_mind I now have the same form-mechanisme that
Microsoft Outlook has. But it has one little bug in it.

When I create a new StickyNotes-form and put f.e. "Hello" in. And then close
the StickyNotes-form the "Hello" will be written to the listview. This works
OK. But when I doubleclick on the icon of the listview to display the Sticky-
Notes-form again with the word "Hello", and change the text f.e. to "Hello You".
And closes and reopen the Sticky-Notes form, it displays just "Hello". So the
text is not written back to the listview when the user doubleclicks on the
icon of the listview and then closes it.

So, there is something not correct in the MouseDoubleClick-event or the FormClose-
event from the StickyNotes-form.

        private void tbNewNote_ItemClick(object sender, ItemClickEventArgs e)
        {
            StickyNotes sticky = new StickyNotes();
            sticky.lblTitle.Text = "";
            sticky.rtbContent.Clear();
            sticky.lblCreation.Text = (DateTime.Now.ToString());
            sticky.FormClosed += new FormClosedEventHandler(sticky_FormClosed);
            sticky.Show();
        }
        //*------------------------------------------------------------*//
        void sticky_FormClosed(object sender, FormClosedEventArgs e)
        {
            StickyNotes sticky = (StickyNotes)sender;
            ListViewItem myItem = new ListViewItem(sticky.lblTitle.Text, 0);
            myItem = lvNotes.Items.Add(myItem);
            myItem.SubItems.Add(sticky.rtbContent.Text);
            myItem.SubItems.Add(sticky.lblCreation.Text);
            myItem.Selected = true;
        }
        //*------------------------------------------------------------*//
        private void lvNotes_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            OpenSticky(lvNotes.SelectedItems[0]);
        }
        //*------------------------------------------------------------*//
        private void OpenSticky(ListViewItem lvi)
        {
            string Title = lvi.Text;
            string Content = lvi.SubItems[1].Text;
            string Creation = lvi.SubItems[2].Text;
            StickyNotes sticky = null;
            foreach (Form frm in Application.OpenForms)
            {
                if (frm is StickyNotes)
                {
                    sticky = (StickyNotes)frm;
                    if (sticky.lblTitle.Text == Title)
                    {
                        if (sticky.WindowState == FormWindowState.Minimized)
                        {
                            sticky.WindowState = FormWindowState.Normal;
                        }
                        sticky.BringToFront();
                        sticky.Select();
                        return;
                    }
                }
            }
            sticky = new StickyNotes();
            sticky.lblTitle.Text = Title;
            sticky.rtbContent.Text = Content;
            sticky.lblCreation.Text = Creation;
            sticky.Show();
        }
        //*------------------------------------------------------------*//

Open in new window


Who knows the answer and is willing to help me?


Greetings,


Peter Kiers
0
Comment
Question by:peterkiers
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 6
  • 3
9 Comments
 
LVL 86

Accepted Solution

by:
Mike Tomlinson earned 500 total points
ID: 37839058
Use the same technique of handling the FormClosed() event just like you did with a new sticky...

See if this works:
        //*------------------------------------------------------------*//
        private void OpenSticky(ListViewItem lvi)
        {
            string Title = lvi.Text;
            string Content = lvi.SubItems[1].Text;
            string Creation = lvi.SubItems[2].Text;
            StickyNotes sticky = null;
            foreach (Form frm in Application.OpenForms)
            {
                if (frm is StickyNotes)
                {
                    sticky = (StickyNotes)frm;
                    if (sticky.lblTitle.Text == Title)
                    {
                        if (sticky.WindowState == FormWindowState.Minimized)
                        {
                            sticky.WindowState = FormWindowState.Normal;
                        }
                        sticky.BringToFront();
                        sticky.Select();
                        return;
                    }
                }
            }
            sticky = new StickyNotes();
            sticky.lblTitle.Text = Title;
            sticky.rtbContent.Text = Content;
            sticky.lblCreation.Text = Creation;
            sticky.Tag = lvi; // <-- save a reference to the ListViewItem
            sticky.FormClosed += new FormClosedEventHandler(EditSticky_FormClosed); // subscribe to the FormClosed() event
            sticky.Show();
        }
        //*------------------------------------------------------------*//
        void EditSticky_FormClosed(object sender, FormClosedEventArgs e)
        {
            StickyNotes sticky = (StickyNotes)sender;
            ListViewItem myItem = (ListViewItem)sticky.Tag;
            myItem.Text = sticky.lblTitle.Text;
            myItem.SubItems[1].Text = sticky.rtbContent.Text;
            myItem.SubItems[2].Text = sticky.lblCreation.Text;
            myItem.Selected = true;
        }
        //*------------------------------------------------------------*//

Open in new window


Note the addition of lines #29 and #30 before the Show() call, along with the new EditSticky_FormClosed() method.
0
 
LVL 1

Author Comment

by:peterkiers
ID: 37839179
Hey Idle_Mind thanks for your solution.
I will test this tommorrow.

Greetings,

Peter Kiers
0
 
LVL 1

Author Comment

by:peterkiers
ID: 37841346
Hi Idle_mind i get an error: "Object reference not set to an instance of an object"
at the line that i have marked with an arrow.

        void sticky_FormClosed(object sender, FormClosedEventArgs e)
        {
            StickyNotes sticky = (StickyNotes)sender;
            ListViewItem myItem = (ListViewItem)sticky.Tag; 
            myItem.Text = sticky.lblTitle.Text; <========================
            myItem.SubItems[1].Text = sticky.rtbContent.Text;
            myItem.SubItems[2].Text = sticky.lblCreation.Text;
            myItem.Selected = true;
        }

Open in new window


Peter
0
Get free NFR key for Veeam Availability Suite 9.5

Veeam is happy to provide a free NFR license (1 year, 2 sockets) to all certified IT Pros. The license allows for the non-production use of Veeam Availability Suite v9.5 in your home lab, without any feature limitations. It works for both VMware and Hyper-V environments

 
LVL 86

Expert Comment

by:Mike Tomlinson
ID: 37842285
In OpenSticky(), did you add line #29?

            sticky.Tag = lvi; // <-- save a reference to the ListViewItem
0
 
LVL 1

Author Comment

by:peterkiers
ID: 37842319
Yes, I have copied your code into my application.


I have only changed this line:
   sticky.FormClosed += new FormClosedEventHandler(EditSticky_FormClosed);
to this:
   sticky.FormClosed += new FormClosedEventHandler(sticky_FormClosed);
 
for the rest the code is the same you posted.

Peter Kiers
0
 
LVL 86

Expert Comment

by:Mike Tomlinson
ID: 37842343
Ah...there was already a sticky_FormClosed() which had a different purpose with a NEW StickyNote.

I had created a new method, EditSticky_FormClosed(), specifically for dealing with the EDITING of an existing Note.

So you need both the old sticky_FormClosed() from your original post, and my new EditSticky_FormClosed() method.

Hopefully that fixes it...
0
 
LVL 1

Author Comment

by:peterkiers
ID: 37842441
I will test it tonight because I am at work.

Peter
0
 
LVL 1

Author Comment

by:peterkiers
ID: 37842566
Ahh, yes that was very dumb of me now I see what i have done wrong.

I will test it tonight.

Peter
0
 
LVL 1

Author Comment

by:peterkiers
ID: 37844221
I have tested the code and it works super.

thank you idle_mind.

500 points are comming your way...

Greetings,

Peter Kiers
0

Featured Post

RHCE - Red Hat OpenStack Prep Course

This course will provide in-depth training so that students who currently hold the EX200 & EX210 certifications can sit for the EX310 exam. Students will learn how to deploy & manage a full Red Hat environment with Ceph block storage, & integrate Ceph into other OpenStack service

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A basic question.. “What is the Garbage Collector?” The usual answer given back: “Garbage collector is a background thread run by the CLR for freeing up the memory space used by the objects which are no longer used by the program.” I wondered …
This article shows how to deploy dynamic backgrounds to computers depending on the aspect ratio of display
In this video, viewers will be given step by step instructions on adjusting mouse, pointer and cursor visibility in Microsoft Windows 10. The video seeks to educate those who are struggling with the new Windows 10 Graphical User Interface. Change Cu…
Visualize your data even better in Access queries. Given a date and a value, this lesson shows how to compare that value with the previous value, calculate the difference, and display a circle if the value is the same, an up triangle if it increased…

627 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question