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  • Wpf: Tips for better performance

    - by viky
    I am working on a wpf application. In which I am working with a TreeView, each node represents different datatypes, these datatypes are having properties defined and using data template to show their properties. My application reads from xml and create tree accordingly. My problem is that when I load it, it is too slow, I want to know about the tricks that will help me to improve performance of my(any) wpf application. Edit: Please provide me some tips for better performance in wpf!! I am using wpf Profiler but it is not much helpful for me.

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  • WPF User Control is causing Out of Memory Exception

    - by Chairman Meow
    Looking for a free spell checking solution, I thought I was so smart in doing this but I guess not. I have created a windows form based application and I want the form to add a user specified amount of user controls (with textboxes) on to a panel. The user can then click some button and the controls on this panel are cleared and new ones are added. The user does something and the process is repeated. Now, I wanted these textboxes to support spell checking and looked all over for a free solution. WPF textboxes support spell checking where the ones in regular win forms do not. I thought I would be able to use these WPF textboxes by adding them to an ElementHost object which is, in turn, within a panel. This panel would be a user control. So, in my application, I would be able to add instances of these user controls onto the form and make use of .NET's spell checking goodness. This actually worked but after using the application for a while, found that the application would eventually freeze on me due to out of memory errors. I have pinpointed the memory errors to these WPF controls since this problem does not happen with normal textboxes. When the window is opened and the number of controls is specified, this is pretty much how the controls are added: Dim xOffset As Integer = 0 For i As Integer = 0 To theNumber Dim myUserControl As New SpecialUserControl() myPanel.Controls.Add(myUserControl) myUserControl.Location = New Point(7, 7) myUserControl.Location = New Point(xOffset, 7) xOffset = xOffset + 207 Next Note that: myPanel is a panel on a form SpecialUserControl is the user control with WPF textbox (within an ElementHost object) When the user pressed a button, the panel is cleared: myUserControl.Controls.Clear() The user can then repeat the process. There are a lot of results on the internet when I tried to find a solution and I'm thinking that the problem I am having is due to the fact that the WPF control is not going away even after clearing the panel. Following this conclusion, I have tried different solutions regarding disposing these controls or setting them to nothing but the memory problem keeps occurring. If someone could give me some advice or ideas here, I'd really appreciate it.

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  • WPF: Combine Geometries / Canvas for Geometries?

    - by stefan.at.wpf
    Hello, I have 2 geometries A and B which I'd like to combine like shown at the end of the following drawing: http://www.imagebanana.com/view/9vm6zoy/geocombine.png How could one do this? Is there something like a "virtual canvas for geometries" where I can place A and B, move B accordingly and then get a geometrie from this? Thanks for any hint!

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  • WPF and windows tiling

    - by SwiftLion
    I have a WPF application that will always run on windows 7, it opens and displays in full-screen mode There is a button within WPF app that opens up Word I would like the WPF application on opening up Word to send a command to the operating system so that it tiles both the WPF application and the Word application windows side by side, so that they each take up 50% of screen each. Is this possible? if yes would anyone know what the code may be? ( a bit like when you right click on windows 7 task bar and click Show Windows Side by Side)

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  • The benefits and hassles of moving entirely to a WPF Project

    - by Ben
    Hi, I have a project that i started as a WinForms application as that was the format i was confortable with at the time. I have since started dabbling in WPF an introduced some WPF UserControls (mainly grids) into my project and absolutely love them. The question i have is, is there any real advantage to me changing the UI Project of my solution into a purely WPF project, and get rid of any WinForms? I am fully aware that each format suits a certain environment, and you wouldnt be able to give a definitive answer without knowing more of the details, but i would like to know peoples opinions, and if anyone has done a silimar thing of converting an existing WinForms App into a WPF frontend, and any observations they made in doing so. Thanks

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  • selected checkbox in WPF

    - by deep
    Hai am having a lot of check box in my wpf form, i want to get the selected checkbox value alone. in winforms we can use foreach(checkbox ck in controls) like that, but i cannot use like that in WPF Forms, how can i get the selected checkbox in WPF FORMS ??

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  • WPF: Create a dialog / prompt

    - by stefan.at.wpf
    Hello, I need to create a Dialog / Prompt including TextBox for user input. My problem is, how to get the text after having confirmed the dialog? Usually I would make a class for this which would save the text in a property. However I want do design the Dialog using XAML. So I would somehow have to extent the XAML Code to save the content of the TextBox in a property - but I guess that's not possible with pure XAML. What would be the best way to realize what I'd like to do? How to build a dialog which can be defined from XAML but can still somehow return the input? Thanks for any hint!

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  • WPF exception handling when launched from WinForms

    - by Sonic Soul
    so i came across this interesting article on WPF exception handling: http://srtsolutions.com/public/item/251263 it works by declaring DispatcherUnhandledException handler in xaml <application> node. but what if a WPF window is launched from win forms application? where can i declare a general exception handler? The problem is that when WPF crashes, it brings down the whole WinForms app with it. *Edit what if instead of launching the WPF window directly, i launched an "Application" which than defined a start window?? is that possible/advisable?

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  • Thin-border on WPF window?

    - by Rezzie
    I'd like to create a window, using WPF, that has a thin border all the way around the form - i.e. no space for the title bar with the icon/caption and min/max/close buttons. For example, the "extra" icons form of the new Windows 7 taskbar: How can I do this with WPF (I don't mind resorting to the Win32 API, if not supported natively by WPF)?

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  • Best 3rd Party WPF Datagrid

    - by John
    We need a powerful datagrid for financial applications to replace existing winforms datagrids. Has anyone tried any 3rd party WPF datagrids recently? We tested a number of WPF grids over a year ago, but at the time they weren't up to standards when compared to their winforms counterparts (in terms of functionality). Please do not reply with: WPF Toolkit ListView You don't need datagrids

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  • Common Wpf pitfalls

    - by Patrick Klug
    I want to gather a list of WPF pitfalls. Issues with WPF that are not that well known and either have some serious design consequences or some major inconveniences. One topic per answer. List: Mouse.GetPosition() does not always return a correct value. The Wpf layout recursion limit is hard coded to 255.

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  • The .NET ActiveX component with WPF content can't be loaded by non MFC app

    - by lonelyflyer
    I have a legacy delphi program and want to add some content implemented with WPF. So I encapsulate the WPF control with a .NET/ActiveX interop technology. That means something like: [ComRegisterFunction()] public static void RegisterClass(string key); [ComUnregisterFunction()] public static void UnregisterClass(string key); The activeX component is a WinForms User Control and the WPF materials are attached to an ElemenHost in this User Control. It works fine if the host app of this ActiveX is a MFC program even without /clr switch. But my legacy app is a delphi program, and it always throw a stackoverflow exception within the constructor of my WPF user control as the program be started. I have no clue, Google is no help. and it has puzzled me for days.

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  • Key strokes in wpf window hosted in MFC ActiveX running in Internet Explorer

    - by user310046
    We have an MFC ActiveX control created in Visual Studio 2008 with CLR support which creates a WPF grid and shows a WPF window within that grid. This ActiveX is hosted within Internet Explorer and it shows up and works nicely except that the tab key, backspace, function keys etc. does not work since they are handeled by IE instead of the WPF window. Regular characters works nicely. This is a known feature and previously when we used to have MFC based dialogs within this ActiveX we used this: http://support.microsoft.com/kb/187988. By just using this code directly the AfxGetApp()->PreTranslateMessage((LPMSG)lParam) statement will return FALSE, so I'm not able to get the key stroke to be handled by the WPF window. I beleive I need to ask the WPF application this instead of the CWinApp, but I'm not sure how and if this can be done. Does anyone have enough understanding of what's going on here to get this to work? Using XBAP instead of ActiveX is not an option as this is run in an intranet application which needs more access than the sandbox can give us. I hope this is enough information. With best regards Svein Dybvik

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  • WPF integrate Windows live authentication for windows health vault

    - by AnD
    Hi all, I'm just wondering if there's any way for WPF application integrated with windows live ID? and it's actually for windows health vault [www.healthvault.com] so health vault is using windows live id or open id to login into their system. and what i gonna do is, creating wpf application (instead of web application) for health vault, so all of the login form username pass and everything is handled inside the wpf application without showing/using any internet browser. so since this's quite new for me, i hope if there's somebody ever did this before especially for health vault system that run on standalone wpf app. alright, so that's it, thank you in advance!

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  • WPF: RadialGradientBrush without gradient?

    - by stefan.at.wpf
    Hello, I want to draw some circles in another circle like this: Is there a way to tell a RadialGradientBrush not to use gradients but just fixed colors, so I can achieve this? Thanks for any hint! (I guess this could be easily done using a DrawingBrush, I'm just wondering whether this could also be done using a RadialGradientBrush)

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  • DataGrid for WPF and Silverlight

    - by Lukas Cenovsky
    Is there a DataGrid component that behaves the same in WPF and Silverlight? There are some small differences in DataGrids from MS (WPF and Silverlight Toolkits). For example, while WPF version has CanUserAddRows property, Silverlight version does not.

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  • opening an emergent window in WPF application

    - by Meli
    I want to open window2.xaml from the window1.xaml window as an emergent (floating) window. In winforms that was form2.show() , how do I do it in WPF for both WPF application and WPFbrowser application? (I assume it's different for WPF application and WPFbrowser application)

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  • WPF and SharePoint 2010

    - by Zee99
    Dear all, We are in the early phases for a big project that will be using SharePoint 2010 (not using webpart, but a whole independent application that will run inside Sharepoint).Out project is Web-enabled (we don;t want a Windows application). The options we have to code our project with are: -Asp.Net Application -WPF 4 -SilverLight 4. My question, what are the pros and cons for using WPF for such a project? Im choosing WPF because i know it's larger than Silverlight and we have more options with it. Is that right? Are there any limitations with WPF/Sharepoint 2010? Thanks.

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  • How to avoid/prevent the system to draw/redraw/refresh/paint a WPF window

    - by Leo
    I have an Application WPF with Visual C# (using visual studio 2010) and I want to draw OpenGL scenes on the WPF window itself. As for the OpenGL drawinf itself, I'm able to draw it w/o problems, meaning, I can create GL render context from the WPF main window itself (no additional OpenGL control, no win32 window inside WPF window), use GL commands and use swapbuffer (all this is done inside a dll - using C - I created myself). However, I have an annoying flickering when, for example, I resize the window. I overrided the OnRender method to re-draw with opengl, but after this, the window is redraw with the background color. It's likely that the system is automatically redrawing it. With WindowForms I'm able to prevent the system to redraw automatically (defining some ControlStyles to true or false, like UserPaint = true, AllPaintingInWmPaint = true, Opaque = true, ResizeRedraw = true, DoubleBuffer = false), but, aside setting Opacity to 1, I don't know how to do all that with WPF. I was hoping that overriding OnRender with no operations inside it would avoid redrawin, but somehow the system still draw the background. Do anyone know how to prevent system to redraw the window? Thx for your time

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