WPF Discussion Boards

Silver light application problem [modified]

6-Nov-09 9:50

TCPMem wrote:
What is this Margin about?

From the docs: "The margin is the space between this object and
other objects that will be adjacent when layout creates the UI."

There's a variety of ways to layout elements in Silverlight/WPF beyond
simple XY coordinates. There are elements that layout their child elements,
and there are elements that layout based on their child elements. Maybe at
least glossing over the documentation will help in understanding at least
the basics of layout in Silverlight.

There's Silverlight documentation available both online[^] and offline[^].

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

rag_Singh5-Nov-09 19:26

rag_Singh

5-Nov-09 19:26

Hello
I have developed a silver light web application.This is working fine when it is running from Visual Studio2008 but if i host it after publishing and accessing via the following link.

URI: http://localhost/WapCosGraph/SilverLightGraphTestPage.aspx

i am getting error:

Webpage error details

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)
Timestamp: Fri, 6 Nov 2009 05:20:37 UTC

Message: Unhandled Error in Silverlight 2 Application An exception occurred during the operation, making the result invalid. Check InnerException for exception details. at System.ComponentModel.AsyncCompletedEventArgs.RaiseExceptionIfNecessary()
at SilverLightGraph.ServiceReference1.getEmpWorkIndivIsualCompletedEventArgs.get_Result()
at SilverLightGraph.Page.objService_getEmpViseArea(Object sender, getEmpWorkIndivIsualCompletedEventArgs e)
at SilverLightGraph.ServiceReference1.Service1Client.OngetEmpWorkIndivIsualCompleted(Object state)
Line: 1
Char: 1
Code: 0
URI: http://localhost/WapCosGraph/SilverLightGraphTestPage.aspx

Please help..
-Raghvendr Singh

modified on Friday, November 6, 2009 1:53 AM

Re: Silver light application problem

Mark Salsbery6-Nov-09 9:55

Re: Silver light application problem

6-Nov-09 9:55

Looks like a web service problem.

Did you adjust the web service's configuration based on the
service's published location?

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

rag_Singh8-Nov-09 18:21

rag_Singh

8-Nov-09 18:21

thank you for your best Suggestion.

Fundamentals: Compiling a Silverlight Application using Csc.exe on the command line

The OldManChild5-Nov-09 13:28

The OldManChild

5-Nov-09 13:28

Is it possible to write and run a basic Hello World Silverlight Application using just Notepad, the C* compiler and the command prompt?

Call me crazy but I like to work from first principles. Gives me a better and in-depth understanding of everything. Also helps me to give my students a fundamental view of programming

Have tried it without success and I am wondering if anyone out there has tried it?

Re: Fundamentals: Compiling a Silverlight Application using Csc.exe on the command line

Mark Salsbery6-Nov-09 9:59

Re: Fundamentals: Compiling a Silverlight Application using Csc.exe on the command line

6-Nov-09 9:59

As far as I know, you'll need to use MSBuild.

Developing a Silverlight Application Assembly[^]

A search on "silverlight command line build" yields some more examples.

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

The OldManChild6-Nov-09 18:54

The OldManChild

6-Nov-09 18:54

Thanks Mark,
It's this article http://www.odewit.net/ArticleContent.aspx?id=SlFromScratch&format=html[^]that sparked my quest but I have spent way too much time on it battling with a CS0116 error.
Will resort to MSBuild

Binding custom objects collection to ListBox in WPF??

mittalpa5-Nov-09 8:25

mittalpa

5-Nov-09 8:25

Hi Thanks for putting this example. But, everywhere I find example of ArrayList containg strings. Is there a way to bind a collection of custom objects?Please advise.

Something like this instead of string collection :

public AlbumCollection GetAlbums()
{
var albumCollection = new AlbumCollection();
albumCollection.Album.Add(new Album() { Description = "A1 Desc", Name = "A1 Name", Id = 1 });
albumCollection.Album.Add(new Album() { Description = "A2 Desc", Name = "A2 Name", Id = 2 });
albumCollection.Album.Add(new Album() { Description = "A3 Desc", Name = "A3 Name", Id = 3 });
albumCollection.Album.Add(new Album() { Description = "A4 Desc", Name = "A4 Name", Id = 4 });
return albumCollection;
}

--------------

public partial class AlbumCollection
{

[EditorBrowsable(EditorBrowsableState.Never)]
private List<Album> albumField;

[System.Xml.Serialization.XmlElementAttribute("Album")]
public List<Album> Album
{
get
{
if ((this.albumField == null))
{
this.albumField = new List<Album>();
}
return this.albumField;
}
set
{
this.albumField = value;
}
}
}

public partial class Album
{

[EditorBrowsable(EditorBrowsableState.Never)]
private List<Document> documentField;

public int Id { get; set; }

public string Name { get; set; }

public string Description { get; set; }

[System.Xml.Serialization.XmlElementAttribute("Document")]
public List<Document> Document
{
get
{
if ((this.documentField == null))
{
this.documentField = new List<Document>();
}
return this.documentField;
}
set
{
this.documentField = value;
}
}
}

Please advise. Thanks
Pankaj

Follow your goals, Means will follow you ---Gandhi---

Re: Binding custom objects collection to ListBox in WPF??

Mark Salsbery5-Nov-09 9:42

New to WPF - Would this be easy to implement?

5-Nov-09 9:42

Do you have an example binding to an AlbumCollection
that doesn't work?

I personally make my custom collection classes like this:

public class AlbumCollection : List<Album>
{
}

so AlbumCollection is a collection instead of contains a collection.

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

AksharRoop4-Nov-09 19:36

AksharRoop

4-Nov-09 19:36

Hi All,

I am just starting with WPF to implement rich GUI application. I have design in my mind and would like you to give suggestion to make it better.

---------------------------------------------------
dropDown1         dropdown2       dropdown3

----------........---------........---------  
..........|......|.........|......|.........|
..........|......|.........|......|.........|
..........|......|container|......|container|
Tree view.|......|..with...|......|..with...|
..........|......|.multiple|......|.multiple|
..........|......|list view|......|list view|
..........|......|.........|......|.........|
..........|......|.........|......|.........|
----------.......-----------......-----------  
---------------------------------------------------

Above is the design i would like to implement. How it should work?
- a user will select an option from dropDown1 and treeview will be filled with hierarchy of active, pending, closed guests.
- When user will select an option from dropDown2/dropDown3 it will fill respective containers with list views (no of list views will be decided at run time by retrieving count from DB so there is requirement that container should pop up scrollbars if listviews crosses the bounds)
- Now user will move (drag and drop) guest from treeview to list view.

This is how application would work. I need your suggestion if this would be easy to implement in WPF. Also share your view on this.

Thanks,
AksharRoop

Mark Salsbery5-Nov-09 7:24

5-Nov-09 7:24

AksharRoop wrote:
if this would be easy to implement in WPF

Yes.

That question is really relative to who answers it.
If you don't think it would be easy, then I reckon you
have some studying to do Smile | :)

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

AksharRoop5-Nov-09 20:09

AksharRoop

5-Nov-09 20:09

Any good sample that would help me with this?

Mark Salsbery6-Nov-09 10:09

6-Nov-09 10:09

AksharRoop wrote:
Any good sample that would help me with this?

There's tons of sample code floating around the internet and on
this site.

I highly recommend studying at least the first 3 or 4 chapters
of the WPF documentation...It will save you a lot of time in the
long run...

Windows Presentation Foundation[^]

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

problem with WPF graph control

AksharRoop8-Nov-09 19:11

AksharRoop

8-Nov-09 19:11

Thanks a lot Mark.

ranganaMIT4-Nov-09 17:18

ranganaMIT

4-Nov-09 17:18

hi guys,

I've developed a graph control in GDI+ and used a timer in it.. now i'm converting it to WPF. but when i went on and search for a timer there is no timers in WPF... how can i resolve this problem?any alternative to use?

regards,
rangana.

Re: problem with WPF graph control

hb521342144-Nov-09 18:04

hb52134214

4-Nov-09 18:04

You can use System.Threading.Timer just like you would in non-WPF code. The problem that you will likely encounter is that DependencyObjects (many object within WPF derive from a DependencyObject) often need to be used within in the object's original thread context. This is easily handled by having your background thread trigger an action within the dependency object's thread. For example to make a TextBlock with a background that alternates between red and blue every 1 second, try the following:

using System.Threading;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
class FlashingText : TextBlock
{
   Timer timer;
   public FlashingText() {
       timer = new Timer(new TimerCallback(Flash), null, 0, 1000);
   }
   void Flash(object state) {
       Dispatcher.BeginInvoke(DispatcherPriority.Normal, new Action(ToggleColor));
   }
   void ToggleColor() {
       Background = Background == Brushes.Blue ? Brushes.Red : Brushes.Blue;
   }
}

A few notes of caution:

I have not tested the code above, I just scribbled it out to illustrate a concept. It may need a few tweaks to compile.

Also, composing a graph with a large number of elements within WPF will often slow the UI thread and may lead to temporary hanging of the UI. To reduce this problem, there are a number of techniques that can reduce or eliminate this issue. In my experience, drawing more than a few thousand points is likely to provide disappointing UI interaction without an efficient design.

XAML TEmplate

Saiyed Alam4-Nov-09 16:08

Saiyed Alam

4-Nov-09 16:08

Can any one tell me where can I get some free XAML(WPF) Template or theme for business application.

Thanking in Advance
Johnny

Re: XAML TEmplate

Richard MacCutchan4-Nov-09 23:20

Richard MacCutchan

4-Nov-09 23:20

Saiyed Alam wrote:
Can any one tell me where can I get some free XAML(WPF) Template or theme for business application.

Look at some of the WPF articles here on CodeProject, there is a superb collection of free code and step by step guidance.

How to find a height of a Grid Row at runtime?

dbrenth4-Nov-09 7:40

dbrenth

4-Nov-09 7:40

I have defined a grid like this:

<br />
     <Grid.RowDefinitions>            <br />
           <RowDefinition Height="Auto"/><br />
           <RowDefinition Height="*" MinHeight="300" /><br />
           <RowDefinition Height="Auto"/><br />
           <RowDefinition Height="Auto"/><br />
       </Grid.RowDefinitions>

I would like to know what the height of Grid.Row 1 is at runtime. Giving it a name and asking for the height only returns a "*". Is there a way to determine this?

Thanks

dbrenth4-Nov-09 7:49

dbrenth

4-Nov-09 7:49

Never mind. I just added a panel around everything in that grid row and the panel knows how high it is.

Thanks

Brent

d m patel4-Jan-10 22:24

d m patel

4-Jan-10 22:24

This is not done in wpf. In wpf panel is not available, so i am using stack panel but still i am getting height = 0 at run time. Is there any other way to find height of grig at run time?

d m patel4-Jan-10 22:01

d m patel

4-Jan-10 22:01

i have same problem, but i want to get height of grid at run time. Is there any way to get height of grid in wpf at run time?