WPF Discussion Boards

WPF DataGrid how to set RowSpan using code-behind?

13-Jan-10 18:33

Hi
I am new wpf and 3D. I want to know how to draw cross section line while mouse enter like (Auto cad) in WPF

Regards
Gopal

hidipak13-Jan-10 10:12

hidipak

13-Jan-10 10:12

I want to set Rowspan for DataGrid's row using code-behind.

Can anyone please tell me how is it possible?

Thanks,
Dipak

Re: WPF DataGrid how to set RowSpan using code-behind?

Abhinav S13-Jan-10 18:33

Abhinav S

13-Jan-10 18:33

AFAIK, DataGrid does not have a rowspan property.

A Grid has a row span and can be set in codebehind as follows

Grid.SetRowSpan();

There are only 10 types of people in this world — those who understand binary, and those who don't.

Problem in Jagged Line in 3d cube in wpf

Gopal_Kanchana13-Jan-10 6:25

13-Jan-10 6:25

Hi
I have problem for displaying jagged line(not smooth vertex) in 3d cube in wpf.

Please let me know how to solve it

Insincere Dave13-Jan-10 6:33

Insincere Dave

13-Jan-10 6:33

Anti-aliasing 3D content is not supported on windows XP. You could try changing HKEY_CURRENT_USER\SOFTWARE\Microsoft\Avalon.Graphics\MaxMultisampleType as described in this article http://msdn.microsoft.com/en-us/library/aa970912.aspx.

Gopal_Kanchana13-Jan-10 6:37

13-Jan-10 6:37

Hi I didn't have this path in my registry
(Avalon.Graphics\MaxMultisampleType)

Only having HKEY_CURRENT_USER\SOFTWARE\Microsoft this path

Insincere Dave13-Jan-10 6:50

Insincere Dave

13-Jan-10 6:50

I think you may have to create it, there are quite a lot of discussions about it on the web that you can search for. I also came across http://stackoverflow.com/questions/39454/is-there-a-secret-trick-to-force-antialiasing-inside-viewport3d-in-windows-xp where it says it should be HKEY_LOCAL_MACHINE\Software\Microsoft\Avalon.Graphics\MaxMultiplesampleType. Neither of them exist on my vista machine but as they're mainly for debugging I think you create them. They affect all the WPF applications and its recommended your app/installer doesn't change them.

Gopal_Kanchana13-Jan-10 18:30

13-Jan-10 18:30

Hi Thanks for your solution

Gopal_Kanchana14-Jan-10 17:39

14-Jan-10 17:39

Hi I have download above registered key
http://blogs.msdn.com/karstenj/archive/2005/09/28/475040.aspx
and installed my system. but still i am getting jagged line. is it my video card not supported? if so what type of card will get supported

Regards
Gopal

testing if window is loaded.

Jammer18-Jan-10 4:48

Jammer

18-Jan-10 4:48

I had to play with video card setup to get it turned on ... even after adding the registry key ...

Jammer
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gritter13-Jan-10 4:29

13-Jan-10 4:29

I am writing a WPF app that loops thru a series of windows. The first time thru, I need to create the next window, but on subsequent times, I want it to re-display the previously created window. I believe the function TryFindResource() should help me do this, but it's not working. See code below.

Private Sub btnGo_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)

     Dim nextWindow As Window = CType(TryFindResource("Window3"), Window)
     If (nextWindow Is Nothing) Then
         nextWindow = New Window3
         nextWindow.Show()
     Else
         nextWindow.Show()
     End If

 End Sub

Appreciate any help with this. Yes, this is my first WPF app.

gritter13-Jan-10 4:59

13-Jan-10 4:59

I changed the line with TryFindResource() to:

Dim nextWindow As Window = CType(Application.Current.TryFindResource("Window3"), Window)

The change made no difference. It still doesn't find the existing instance of Window3.

Ian Shlasko13-Jan-10 5:52

Ian Shlasko

13-Jan-10 5:52

Try a static/shared field - These are related to the class itself, not to the instance of the class:

In the Window3 code:

Private Shared _currentInstance as Window3

Public Shared Function GetInstance() As Window3
  If _currentInstance Is Nothing Then
    _currentInstance = New Window3
  End If

 GetInstance = _currentInstance
End Function

Also, be sure to add code to the OnClosing, or some similar location, to set _currentInstance back to Nothing if you close Window3.

And in your btnGo code:

Window3.GetInstance().Show()

Oh, and might want to consider giving Window3 a more meaningful name.

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gritter13-Jan-10 6:48

13-Jan-10 6:48

Thanks! That works, except it does shift focus to the "called window". If you can help me out here too, I would appreciate it. WPF makes me feel pretty helpless. I didn't realize it was so different from WinForms.

gritter13-Jan-10 6:58