Re: (De)serialization progress - C# Discussion Boards

8-Apr-08 6:21

Hi,

has anyone ever needed to report progress when (de)serializing objects? I have implemented loading/saving project files (for my application) via serialization and this could take up to 5-10 sec, depending on what's in the project. So I'd like to do it asychronously and report progress. Is there any way how to find out (de)serialization progress(perc completed)?

thanx

zilo

Giorgi Dalakishvili8-Apr-08 6:45

Giorgi Dalakishvili

8-Apr-08 6:45

I remember reading an article about it but I can't remember where I found it. I am more than sure Google has the answer[^]

Giorgi Dalakishvili

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Stevo Z8-Apr-08 6:58

8-Apr-08 6:58

How do you think your post was helpful to me?

zilo

Giorgi Dalakishvili8-Apr-08 7:06

Giorgi Dalakishvili

8-Apr-08 7:06

If my post was not helpful, you can ignore it. However, If my post was not helpful, I am afraid that none of the post will be helpful for you.

Good luck Wink | ;)

Giorgi Dalakishvili

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Stevo Z8-Apr-08 7:13

8-Apr-08 7:13

Thank you very much for help. Next time please don't bother me with such answers

zilo

Giorgi Dalakishvili8-Apr-08 7:50

Giorgi Dalakishvili

8-Apr-08 7:50

Ok, I won't. If you don't want to you will not get help from me.

Giorgi Dalakishvili

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Dave Kreskowiak8-Apr-08 7:24

Dave Kreskowiak

8-Apr-08 7:24

That depends on how you're serializing objects. If you're just calling a single method that walks an object graph, then you're not going to get anny progress information back from that method. If you're writing the code to walk the object graph, serializing each node yourself, then you can put some extra code in there to report some kind of progress.

But, if you have no way of knowing when the end of the graph is, you really can't report any percentage of progress completed. So, you're only other option would be to use a non-progressing progress bar. It'll just show something is still happening, but not report real progress.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Stevo Z8-Apr-08 7:37

Any customize control like this?

8-Apr-08 7:37

Thanx for answer.

that's what I was afraid of... I was hoping there might be at least something saying on what position of the Stream is the serializer currently, that would be more than enough for my needs...

btw I'm using BinaryFormatter.Deserialize (Serialize) and I'm implementing the ISerializable interface (GetObjectData and Constructor) for classes to serialize.

I'll just say that something is happening...

zilo

hitdemo8-Apr-08 6:10

hitdemo

8-Apr-08 6:10

i want a customize listview with multi checkbox in multi subitem ,when add a new item, checkbox should appear in these subitem. just like under picture, any suggest or link,thx

http://farm3.static.flickr.com/2179/2398131997_8706010b35.jpg?v=0

DataGridViewComboBoxCell Problem

Linn728-Apr-08 5:35

Linn72

8-Apr-08 5:35

I use the function bellow to create a DataGridViewComboBoxCell in databound gridview in a datagridviewtextboxcolumn. When I enter the cell I can see the dropdown arrow, but when i click on the arrow nothing happens.
Can anybody help me please
Maris

<br />
private void AddComboBox(int index, string selectedValue, List<string> projects)<br />
        {<br />
            if (projects == null)<br />
                throw new NullReferenceException("Project list vas empty");<br />
            DataGridViewComboBoxCell aCell = new DataGridViewComboBoxCell();<br />
            foreach (string s in projects)<br />
            {<br />
                aCell.Items.Add(s);<br />
            }<br />
            aCell.Value = selectedValue;<br />
            aCell.DropDownWidth = 1000;<br />
            _dataGridView.Rows[index].Cells[0] = aCell;<br />
        }<br />
private void _dataGridView_CellMouseEnter(object sender, DataGridViewCellEventArgs e)<br />
{<br />
            if (e.RowIndex >= 5 && e.RowIndex <= 9)<br />
            {<br />
                List<string> projectList = _domainFacade.GetProjects();<br />
                string listValue = projectList[0];<br />
                AddComboBox(e.RowIndex, listValue, projectList);<br />
            }<br />
        }<br />

Re: DataGridViewComboBoxCell Problem

Ravenet8-Apr-08 16:03

Ravenet

8-Apr-08 16:03

Is this web or windows?

Cheers,Earn and Enjoy
RRave
MCTS,MCPD
http://ravesoft.blogspot.com

Re: DataGridViewComboBoxCell Problem

Linn728-Apr-08 19:49

Linn72

8-Apr-08 19:49

it is windows

Re: DataGridViewComboBoxCell Problem

Ravenet8-Apr-08 19:54

Ravenet

8-Apr-08 19:54

So
your code may have incorrect way.

please check your code is correct.

i think u must add cellcolumn.instead of assign to cell.

because of we want to add our cell column control to datagridview control collections.

Cheers,Earn and Enjoy
RRave
MCTS,MCPD
http://ravesoft.blogspot.com

SaveFileDialog filter

lsconyer8-Apr-08 5:11

lsconyer

8-Apr-08 5:11

Hello all. I'm trying to allow a user to save a text file and only a text file. My filter is "Text files (*txt)|*txt" This seems to be set up fine but when I save a file, I can save as .doc. This shouldn't happen, at least that's what I thought.

Where am I going wrong?

Lester
http://www.lestersconyers.com

Re: SaveFileDialog filter

Dave Kreskowiak8-Apr-08 5:39

Dave Kreskowiak

8-Apr-08 5:39

You're making the assumption that the SaveAs dialog restricts the extension the user can use. Wrong. This only filter the filenames listed in the dialog box. You're code has to make sure the extension is correct, and fix it if it's not, after the user clicks OK and before you open the stream to start writing your data.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

issue with scroll sync

Pathetic Logic8-Apr-08 4:48

Pathetic Logic

8-Apr-08 4:48

I have used WndProc() override to perform PostMessage(this.listViewEx2.Handle, WM_VSCROLL, e.WParam, IntPtr.Zero);

I managed to bring it to some shape now but came up with some amazingly annoying issues!

In all my issues here are as follows
1. scroll works only by thumb tack
2. mouse scroll doesnt trigger listview2
3. scrolling using the bar and not the thumb tack doesnt scroll the listview2
4. how do i prevent the two events from going into an infinite loop when i paste the code for ListView2_Scroll?

Hoping for an express response!
-
Roger Sigh | :sigh:

Judah Gabriel Himango8-Apr-08 5:04

Judah Gabriel Himango

8-Apr-08 5:04

Perhaps if you specify what you're trying to do, we can provide you with an alternate, managed way to do it.

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Judah Himango

Pathetic Logic8-Apr-08 6:04

Pathetic Logic

8-Apr-08 6:04

private void listViewEx1_Scroll(object Sender, LifeHouse.ListViewEx.ListViewEx.MyScrollEventArgs e)<br />
        {<br />
            try<br />
            {<br />
                //listViewEx2_Scroll(listViewEx1, e);<br />
                Int16 hi = (Int16)((int)e.WParam >> 16);<br />
                Int16 lo = (Int16)(int)e.WParam;<br />
                IntPtr temp;<br />
                if (e.Orientation == ScrollOrientation.VerticalScroll)<br />
                {<br />
                    if (lo == 5)<br />
                    {<br />
                        if (SetScrollPos(this.listViewEx2.Handle, SBS_VERT, hi, true) != 0)<br />
                        {<br />
                            temp = (IntPtr)(4 + 0x10000 * hi);<br />
                            PostMessage(this.listViewEx2.Handle, WM_VSCROLL, temp, IntPtr.Zero);<br />
                            //SendMessage(this.listViewEx2.Handle, WM_VSCROLL, (IntPtr)(4 + 0x10000 * hi), IntPtr.Zero);<br />
                        }<br />
                    }<br />
                    else<br />
                    {<br />
                        PostMessage(this.listViewEx2.Handle, WM_VSCROLL, e.WParam, IntPtr.Zero);<br />
                        //SendMessage(this.listViewEx2.Handle, WM_VSCROLL, e.WParam, IntPtr.Zero);<br />
                    }<br />
                }<br />
<br />
                if (e.Orientation == ScrollOrientation.HorizontalScroll)<br />
                {<br />
                    if (lo == 5)<br />
                    {<br />
                        SetScrollPos(this.listViewEx2.Handle, SBS_HORZ, hi, true);<br />
                        PostMessage(this.listViewEx2.Handle, WM_HSCROLL, (IntPtr)(4 + 0x10000 * hi), IntPtr.Zero);<br />
                        //SendMessage(this.listViewEx2.Handle, WM_HSCROLL, (IntPtr)(4 + 0x10000 * hi), IntPtr.Zero);<br />
                    }<br />
                    else<br />
                    {<br />
                        PostMessage(this.listViewEx2.Handle, WM_HSCROLL, e.WParam, IntPtr.Zero);<br />
                        //SendMessage(this.listViewEx2.Handle, WM_HSCROLL, e.WParam, IntPtr.Zero);<br />
                    }<br />
                }<br />
            }<br />
<br />
            catch (Exception ex)<br />
            {<br />
                MessageBox.Show(ex.ToString());<br />
            }<br />
        }

This is my code that is supposed to scroll ListViewEx2 when ListViewEx1 is clicked. I am able to achieve a scroll with the thumbtrack of ListViewEx1 but when i hold and drag the scrollbar there is no change in ListViewEx2's scroll in contents (that is, only the scroll bar moves while the content staying put).
Mouse's wat scroll event could trigger a similar scroll?
How to get both scrolls to sync?

Judah Gabriel Himango8-Apr-08 7:04

Judah Gabriel Himango

8-Apr-08 7:04

I'm not sure how to do this. I see a few other people have tried, perhaps these will help: Using a WndProc to scroll a list box[^], programmatically scrolling a ListView[^],

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: I'm Offended That You're Offended!
The apostle Paul, modernly speaking: Epistles of Paul

Judah Himango

Luc Pattyn8-Apr-08 7:18

Luc Pattyn

8-Apr-08 7:18

If you want to sync the scrolling of two lists, here might be the right way to get it:
- for each item in the master list, identify the corresponding item in the slave list,
and add a (masterItem, slaveItem) to a Hashtable/Dictionary;
- whenever the master list scrolls, determine the new top master item, look up the
corresponding slave item, and scroll the slave list using ListView.TopItem,
ListBox.TopIndex or a similar property.
When the master list does not offer a scrollChanged event, use a Windows.Forms.Timer to do
the above periodically.

That should be much simpler than manipulating Windows messages, WndProc and the like.

Smile | :)

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