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WPF QUESTIONS

WPF change ItemsPanel and ItemTemplate in code behind
WPF change ItemsPanel and ItemTemplate in code behind
I think the issue was by ths following , Your obvious problem is that you are using Resources[] instead of FindResource(). In general, Resources[] will only work if your resource is in the this.Resources dictionary, and not elsewhere.This is how I wo
TAG : wpf
Date : November 27 2020, 07:01 PM , By : Amo
Locating binding errors
Locating binding errors
should help you out I generally set a breakpoint on the code that actually writes the error message. When the breakpoint is hit I inspect the visual tree of the object that had the binding error using a Visual Studio visualizer. This almost always te
TAG : wpf
Date : November 27 2020, 07:01 PM , By : Ravi Narkhede
Databinding an enum to a ComboBox in WPF + MVVM
Databinding an enum to a ComboBox in WPF + MVVM
it should still fix some issue I've read this very related question here on SO, and it was extremely helpful because of the link in the answer. I'm just having a problem now going the extra step and making it all work with the MVVM pattern. , Simples
TAG : wpf
Date : November 27 2020, 07:01 PM , By : Kasun Lakshan
Rendering EMF/WMF images in WPF XAML
Rendering EMF/WMF images in WPF XAML
like below fixes the issue Check out this thread. You won't like the answer. ;-)http://social.msdn.microsoft.com/forums/en-US/wpf/thread/7010cefa-e596-45af-b193-40206451dd90/
TAG : wpf
Date : November 26 2020, 07:01 PM , By : Andreas Gloor
Using Unit of Work design pattern / NHibernate Sessions in an MVVM WPF
Using Unit of Work design pattern / NHibernate Sessions in an MVVM WPF
like below fixes the issue I know this dates from a while ago but I've been looking online for a decent answer for 3 days. I read the two blogs you mention had a look at the Nhibernate 3.0 cookbook where they also talk about Nhibernate in a MVP appli
TAG : wpf
Date : November 26 2020, 07:01 PM , By : Vinnie
Implementing commands in MMVM
Implementing commands in MMVM
wish helps you Depending on whose implementation of RelayCommand you're using, it should take an Action as a parameter to its constructor which represents the code to be called when it's implemented. So in your ViewModel:
TAG : wpf
Date : November 26 2020, 07:01 PM , By : RM007
What is the WPF equivalent for the FlowLayoutPanel?
What is the WPF equivalent for the FlowLayoutPanel?
this will help Maybe Wrap panel will help.
TAG : wpf
Date : November 25 2020, 07:01 PM , By : Fuad Nazal
Button ControlTemplate and rounded corners
Button ControlTemplate and rounded corners
it should still fix some issue I have a controltemplate for buttons. I want to make the buttons with rounded corners. How should I do this? , Try the following:
TAG : wpf
Date : November 24 2020, 07:00 PM , By : bit.man
Need help understanding WPF MeasureOverride and ArrangeOverride infinity and 0 sizes
Need help understanding WPF MeasureOverride and ArrangeOverride infinity and 0 sizes
this will help In the measure step, if WPF sends you infinity, you are supposed to tell it how big you want to be. If it sends 0, then there is literally no space for your layout. In the arrange step, you will be told how much space is available for
TAG : wpf
Date : November 23 2020, 07:00 PM , By : user3862602
Key strokes in wpf window hosted in MFC ActiveX running in Internet Explorer
Key strokes in wpf window hosted in MFC ActiveX running in Internet Explorer
fixed the issue. Will look into that further We have hosted a WPF user control inside an MFC modeless dialog. In order to get some keyboard stuff working correctly, we had to modify the dialogs PreTranslateMessage() function.Basically, what we did wa
TAG : wpf
Date : November 23 2020, 07:00 PM , By : psychictraveller
WPF - simple relative path - FindAncestor
WPF - simple relative path - FindAncestor
will help you It seems that since ToolTip does not have a parent, you need to bind to the placement target as below:
TAG : wpf
Date : November 22 2020, 07:01 PM , By : user3862180
Possible to InvalidateVisual() on a given region instead of entire WPF control?
Possible to InvalidateVisual() on a given region instead of entire WPF control?
it should still fix some issue When you want to write WPF custom/composite controls, you should try to avoid overriding OnRender as possible especially if you plan to invalidate portions of it. It's much easier to use AddVisualChild + override Visual
TAG : wpf
Date : November 21 2020, 07:01 PM , By : spec
Xaml parse exception is thrown when i define a duplex contract
Xaml parse exception is thrown when i define a duplex contract
Any of those help Your Window1 constructor is throwing an exception. Confusingly, WPF wraps such exceptions in a XamlParseException, even though they have nothing to do with XAML.To find out what is going on:
TAG : wpf
Date : November 21 2020, 07:01 PM , By : ryan
Horizonatal Scrolling in FlowDocumentScrollViewer
Horizonatal Scrolling in FlowDocumentScrollViewer
I hope this helps you . Found the answer, setting the PageWidth of the document does the trick.
TAG : wpf
Date : November 21 2020, 07:01 PM , By : Velmith
Setting properties of auto-generated listboxitem
Setting properties of auto-generated listboxitem
like below fixes the issue This one is indeed tricky. I found two proposed solutions for you, neither are very easy to implement I am afraid. I hope it works for you!
TAG : wpf
Date : November 21 2020, 07:01 PM , By : Mauro Ibañez
ContentTemplateSelector is only called one time showing always the same datatemplate
ContentTemplateSelector is only called one time showing always the same datatemplate
Any of those help I like Neil's solution (found on Josh's post via the link you provided):
TAG : wpf
Date : November 20 2020, 07:00 PM , By : cheggers
Why do I get a NullReferenceException when using a style on a ContentPresenter?
Why do I get a NullReferenceException when using a style on a ContentPresenter?
this will help Fixing the problem turned out to be simple: move the style from the ItemsControl's resource dictionary to the DataTemplate's. I still don't know why I was getting a null-reference exception, though.
TAG : wpf
Date : November 17 2020, 07:01 PM , By : Rakesh
Using TextOptions.TextFormattingMode with FormattedText
Using TextOptions.TextFormattingMode with FormattedText
should help you out There's an overloaded constructor for FormattedText that allows specifying a TextFormattingMode: http://msdn.microsoft.com/en-us/library/ee474866.aspx
TAG : wpf
Date : November 17 2020, 07:01 PM , By : Praveen Pulikunnu
How to make an invisible button to run a command
How to make an invisible button to run a command
like below fixes the issue While Skeets' and Abe's methods work, they are hacks. You can simply specify that a WPF command should also be invoked by a so called InputGesture, in this case a KeyGesture ("enter", or "escape"). You can set the scope of
TAG : wpf
Date : November 17 2020, 07:01 PM , By : user3860414
WPF DialogResult declaratively?
WPF DialogResult declaratively?
wish helps you You can do this with an attached behavior to keep your MVVM clean. The C code for your attached behavior might look something like so:
TAG : wpf
Date : November 16 2020, 07:01 PM , By : user3860133
WPF Using commands to slow to update UI controls
WPF Using commands to slow to update UI controls
fixed the issue. Will look into that further When your BackgroundWorker completes, call CommandManager.InvalidateRequerySuggested();By default, Commands are only requeried occasionally by WPF. Otherwise, there would be a huge amount of overhead in co
TAG : wpf
Date : November 15 2020, 07:01 PM , By : javo900
HeaderedContentControl ItemsSource
HeaderedContentControl ItemsSource
With these it helps Because ItemsSource is all about multiple pieces of content, and HeaderedContentControl has one piece of content. Put another way, HeaderedContentControl's job is to present a single object, so it doesn't need a property whose job
TAG : wpf
Date : November 14 2020, 07:01 PM , By : skp
Can't override a global WPF style that is set by TargetType on a single specific control
Can't override a global WPF style that is set by TargetType on a single specific control
This might help you Another alternative is to add an empty style on the UserControl such as:
TAG : wpf
Date : November 13 2020, 07:01 PM , By : labudamike
wpf cancel backgroundworker on application exits
wpf cancel backgroundworker on application exits
fixed the issue. Will look into that further Cancellation is not automatic, your code in the DoWork event handler needs to handle the cancellation by checking the value of the CancellationPending property. Calling CancelAsync doesn't abort the thread
TAG : wpf
Date : November 12 2020, 07:00 PM , By : ron
WPF charting/visualization of realtime data
WPF charting/visualization of realtime data
I think the issue was by ths following , Disclosure: I own ABT Software and have developed SciChart, plus have contributed towards the WriteableBitmapEx open source library
TAG : wpf
Date : November 11 2020, 07:00 PM , By : Peter
Is there a way to do simple calculations in a xaml element binding statement other than using a converter?
Is there a way to do simple calculations in a xaml element binding statement other than using a converter?
I hope this helps you . I do not think there is a Binding solution without a converter. But why not use one? You will often come across a requirement like this, so it makes sense to create some sort of MathConverter which takes some properties or par
TAG : wpf
Date : November 11 2020, 07:00 PM , By : user3858662
WPF How to get window reference that is loaded from a page that is into it?
WPF How to get window reference that is loaded from a page that is into it?
To fix this issue I'm not 100% sure if I am understanding exactly what you mean.... if you're talking about a Windows Application that where a User Control is situated in a Window, and you want to do something to the Window from the User Control, you
TAG : wpf
Date : November 11 2020, 07:00 PM , By : user234260
WPF Check/Uncheck all checkboxes located in a gridview
WPF Check/Uncheck all checkboxes located in a gridview
around this issue You dont have to check/uncheck all the checkboxes. you just set the property that the check boxes are bound to and then the check boxes will check uncheck. You do however need to implement INotifyPropertyChanged. This lets the UI kn
TAG : wpf
Date : November 10 2020, 07:00 PM , By : user3858513
Selected item in listbox unreadable because of the color
Selected item in listbox unreadable because of the color
I hope this helps you . Dunno if it still matters (last answer was on Mar 25 2010), but for the people who are still wondering how to accomplish this I did it this way:In the Style part:
TAG : wpf
Date : November 10 2020, 07:00 PM , By : user3858375
dynamic ContextMenu in TreeView vs. MVVM
dynamic ContextMenu in TreeView vs. MVVM
like below fixes the issue I think I understand your question. I think that you could structure your ViewModels like this:
TAG : wpf
Date : November 10 2020, 07:00 PM , By : Magesh Babu
wpf prism (CAL) - Closing Window in Popup Region when the ViewModel knows nothing of the View
wpf prism (CAL) - Closing Window in Popup Region when the ViewModel knows nothing of the View
it helps some times We have a Region in the Window tag of our shell, adding things to this region pops out another Window. , Andy,It took me quite awhile to figure this one out myself.
TAG : wpf
Date : November 10 2020, 07:00 PM , By : Timofey Pchelintsev
Free WPF Flow charting Component
Free WPF Flow charting Component
will help you The WPF Diagram Designer on CodeProject does much of this.
TAG : wpf
Date : November 09 2020, 07:01 PM , By : cerbrendus
WPF DataGrid programmatic multiple row selection
WPF DataGrid programmatic multiple row selection
may help you . Salam MicMit :) Yeah, there is a more simple solution, you need just to add the items you want from your bound list to your DataGrid SelectedItems collection, see the code below: [Don't forget to mark as answer if this post solved your
TAG : wpf
Date : November 08 2020, 07:01 PM , By : facebook-10000257579
WPF Best point to update a progress bar from BackgroundWorker
WPF Best point to update a progress bar from BackgroundWorker
it should still fix some issue Since the Background worker works in a separate thread, you'll run into problems if you try to access UI objects. Calling the ReportProgress method on the worker from inside the DoWork handler raises the ProgressChanged
TAG : wpf
Date : November 08 2020, 07:01 PM , By : Sc0re
How to return a value with Dispatcher.Invoke?
How to return a value with Dispatcher.Invoke?
This might help you Anyone knows how to return a value from Dispatcher.Invoke in wpf? I want to return the selected index for a ComboBox. , There's another way that returns value from Invoke():
TAG : wpf
Date : November 07 2020, 07:01 PM , By : user3857521
XAML C# WPF Best efficient way to do an ordered sequence of animations
XAML C# WPF Best efficient way to do an ordered sequence of animations
I wish this help you The easiest way is to define the entire animation in a single storyboard with suitable BeginTime and Duration properties. This way the entire animation can be started and stopped as a unit, but you can have different sequences. F
TAG : wpf
Date : November 06 2020, 07:00 PM , By : user3857206
WPF + Communicate between multiple application instances
WPF + Communicate between multiple application instances
it helps some times You'll need to use some form of Interprocess Communication.Since you're using WPF, and hence .NET, I'd recommend using Windows Communication Foundation. If these instances are running on the same system, using pipes via WCF is a g
TAG : wpf
Date : November 06 2020, 07:00 PM , By : Willow
WPF: control.ItemContainerGenerator.Status is NotStarted. How do I tell it to start now?
WPF: control.ItemContainerGenerator.Status is NotStarted. How do I tell it to start now?
To fix the issue you can do You may want to start the generator manually if you doing some syncronous operation - I had to generate the result view to meassure it before chunking it up on pages.
TAG : wpf
Date : November 06 2020, 07:00 PM , By : user3856928
wpf do animation until background worker finishes its work
wpf do animation until background worker finishes its work
it helps some times Your animations will be hosted in a Storyboard. To make the animations run indefinitely, set the Storyboard's RepeatBehavior to Forever. To start the animations when you kick off the BackgroundWorker, call the Storyboard.Begin met
TAG : wpf
Date : November 06 2020, 07:00 PM , By : Jamilah
Exit thread automatically when WPF application closes
Exit thread automatically when WPF application closes
like below fixes the issue Just set the IsBackground property of the Thread to true so it doesn't prevent the process from terminating.
TAG : wpf
Date : November 06 2020, 07:00 PM , By : Vijay
WPF: How do I set the focus on a datagrid to a specific row?
WPF: How do I set the focus on a datagrid to a specific row?
it fixes the issue After selecting the row you will have to set the focus on the row in the following way:
TAG : wpf
Date : November 06 2020, 07:00 PM , By : Rainbowinthesky
Hello World Surface app doesn't work
Hello World Surface app doesn't work
help you fix your problem Solved. The problem was that I needed to pre-start the Surface Simulator and set the Build CPU to x86.
TAG : wpf
Date : November 05 2020, 07:01 PM , By : Marry
How to make a tooltip appear immediately in Silverlight?
How to make a tooltip appear immediately in Silverlight?
help you fix your problem You'll need to hook the MouseEnter event and show it straight away yourself:-
TAG : wpf
Date : November 05 2020, 07:01 PM , By : user3856786
wpf textbox flat border style
wpf textbox flat border style
wish helps you The way to do this is to use a control template to draw the border yourself. You can do this in many different ways, heres a couple for you to look at.The quick hack approach:
TAG : wpf
Date : November 04 2020, 07:01 PM , By : Graphy Kumar
WPF DataGrid DataGridHyperlinkColumn bound to Uri
WPF DataGrid DataGridHyperlinkColumn bound to Uri
may help you . The ContentBinding property can be used to display text other than the actual URL. For example, if I am binding to data with friendly, human-readable text in ProductName and the actual URL in ProductUri, I might do this:
TAG : wpf
Date : November 04 2020, 07:01 PM , By : Raymundinho
Resize a WPF window, but maintain proportions?
Resize a WPF window, but maintain proportions?
I hope this helps you . I've found a good answer by Nir here. There are still some flaws, basically resizing in top right corner, bottom right corner and bottom side will be fine, other sides and corners are not. The bright side is, the aspect ratio
TAG : wpf
Date : November 04 2020, 07:01 PM , By : JCFLY
WPF element binding across separate windows
WPF element binding across separate windows
I wish this helpful for you You should use a (global) ViewModel, containing the data you need to share, and bind to the property from that ViewModel.This way the changes in either of windows are reflected in the bound data object, and back.
TAG : wpf
Date : November 03 2020, 07:01 PM , By : user3856175
How to bind a Listview MaxHeight to the current windows height?
How to bind a Listview MaxHeight to the current windows height?
This might help you Another approach (without converter) would be to simply place it in a star-sized Grid. Certainly, this puts some restrictions on your layout. So, it depends on the other content whether this approach can be used or not.
TAG : wpf
Date : November 03 2020, 07:01 PM , By : Rodd
WPF - DataGrid Column's ToolTip visibility based on the column's data length
WPF - DataGrid Column's ToolTip visibility based on the column's data length
To fix this issue The DataContext of your ToolTip is set to System.Windows.Controls.TextBlock, since you have defined it as RelativeSource.Self.If you lose the ToolTip DataContext, you should be able to bind to your Text property.
TAG : wpf
Date : November 03 2020, 07:01 PM , By : 이시형
WPF ListBox Data Binding Works in Designer but not Runtime
WPF ListBox Data Binding Works in Designer but not Runtime
I hope this helps you . I have a maddening problem - I cannot get basic data binding to work even with copied examples. In the designer the listbox has 2 items but at runtime it's empty. , Blimey - I hate XML Namespaces!
TAG : wpf
Date : November 03 2020, 07:01 PM , By : user3855938
WPF - DataGrid Column Header Alignment
WPF - DataGrid Column Header Alignment
With these it helps OK, found the answer.The property I was looking for was VerticalContentAlignment.
TAG : wpf
Date : November 02 2020, 07:01 PM , By : Eupólemo Castro
How to remove all views in region in CompositeWPF/Silverlight
How to remove all views in region in CompositeWPF/Silverlight
wish help you to fix your issue Check first that _regionManager.Regions["NavigationRegion"] actually exists and is non null like so
TAG : wpf
Date : November 01 2020, 07:01 PM , By : user3855458
Dependency propery Binding Problem
Dependency propery Binding Problem
should help you out Your code handles the callback from the dependency property and sets the text box value directly. This is not the role of this callback.And by setting the Text property, you have lost the binding. Local property setting has a high
TAG : wpf
Date : November 01 2020, 07:01 PM , By : haiyuan
wpf toolkit calendar, show selected date as today
wpf toolkit calendar, show selected date as today
will be helpful for those in need How to do that? I would like the textbox in the datepicker to show today's date, not by hardcode, perhaps some binding needed? , try this
TAG : wpf
Date : November 01 2020, 07:01 PM , By : lmnmamun
WPF Datagrid Cell with Validation Error Style
WPF Datagrid Cell with Validation Error Style
wish of those help I am trying to change the default style of a DataGridCell (within a WPF Toolkit DataGrid) when there is a validation error. The default is a red border. How can I put my own template? , Try this:
TAG : wpf
Date : October 30 2020, 08:01 PM , By : user3854797
WPF: ContextMenu item bound to a Command is enabled only after invoking the command from another source. Why does this b
WPF: ContextMenu item bound to a Command is enabled only after invoking the command from another source. Why does this b
I hope this helps you . Seems to be a bug where there is no focused element in the window's main focus scope. A workaround is to bind MenuItem's CommandTarget to the main window.Answer from Marco Zhou here: http://social.msdn.microsoft.com/Forums/en-
TAG : wpf
Date : October 29 2020, 08:01 PM , By : user3854594
System.Reflection.AmbiguousMatchException
System.Reflection.AmbiguousMatchException
I hope this helps you . Just a wild guess, but this may be due to a derived class having a property that is hiding the base class implementation, confusing the reflection mechanism.If you use GetType().GetProperty(propertyName, BindingFlags.Instance
TAG : wpf
Date : October 28 2020, 08:00 PM , By : Mathieu Thiry
WPF application crash after ClickOnce publish
WPF application crash after ClickOnce publish
will help you On the machine where the application is installed, drill down in the user profile to the ClickOnce cache, and look for the cached application files. The folder will have the exe and all of the assemblies, etc., in it. Our winform app cr
TAG : wpf
Date : October 28 2020, 04:55 PM , By : stefoonk
WPF: How to properly override the methods when creating custom control
WPF: How to properly override the methods when creating custom control
it fixes the issue ToolboxItem is overriding the default style for ContentControl. You haven't posted the overridding style (from generic.xaml), but I suspect your problem is with the template defined in that style. Your ToolboxItem template needs to
TAG : wpf
Date : October 28 2020, 04:55 PM , By : user3853751
How we can set scrollbar on last row of data grid in WPF
How we can set scrollbar on last row of data grid in WPF
fixed the issue. Will look into that further enter image description here How we can set scrollbar on last row of data grid in WPF
TAG : wpf
Date : October 14 2020, 01:00 PM , By : Vivek Singh Bhadauri

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