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WPF QUESTIONS

WPF - How to keep elements in proportion and resize everything
WPF - How to keep elements in proportion and resize everything
will help you That's pretty uncommon behavior you want to achieve. However, I think you can do it by wrraping all your controls that you want to resize, inside a Viewbox. Can't give a sample since writing this from phone.
TAG : wpf
Date : January 12 2021, 07:00 PM , By : dyarborough
WPF binding of property with multiple usercontrols level
WPF binding of property with multiple usercontrols level
I wish this helpful for you I would try to avoid handling Visibility too much in a ViewModel. Instead, expose a bool e.g. LoggedIn and bind to it in your View. There you can use a Style/DataTrigger to change Visibilies accordingly.
TAG : wpf
Date : January 11 2021, 05:14 PM , By : Nick Coats
Use WPF with .NET Standard Library
Use WPF with .NET Standard Library
Does that help Finally, I got in contact with Microsoft. They were very helpful and provided the following snippet of a *.csproj file to me:
TAG : wpf
Date : January 11 2021, 03:26 PM , By : Thomas Gueze
Databinding ObservableDictionary to DataGrid not working
Databinding ObservableDictionary to DataGrid not working
seems to work fine When you enumerate a Dictionary, you get an enumeration of KeyValuePair. That's right there in your ObservableDictionary class:
TAG : wpf
Date : January 11 2021, 11:39 AM , By : Sandip
Srollviewer doesn't work in TabControl.ItemsPanel
Srollviewer doesn't work in TabControl.ItemsPanel
wish help you to fix your issue Define a custom ControlTemplate where you put a ScrollViewer around the TabPanel. You will also have to change the Height of the first RowDefinition in your Grid from Auto to *:
TAG : wpf
Date : January 10 2021, 02:04 PM , By : George H.
WPF: Get single points of a Path?
WPF: Get single points of a Path?
I hope this helps you . Geometry.GetFlattenedPathGeometry returns "a polygonal approximation of the Geometry object." You can then iterate over the figures and segments of the flattened Geometry: each figure should consist of a single PolyLineSegment
TAG : wpf
Date : January 10 2021, 01:57 PM , By : cautionsign
How to extend WPF hit testing zone for a Path object
How to extend WPF hit testing zone for a Path object
wish help you to fix your issue Path.Data is a geometry object. The Geometry class has several methods that can help you hit test with tolerance:
TAG : wpf
Date : January 10 2021, 01:57 PM , By : NewGirl
WPF datagrid column heading span more than once column
WPF datagrid column heading span more than once column
around this issue This is an old thread, but I thought I should share how I did it.In my application, I want to display three columns of date entries, under a single column header, "Maintenance Fee Dates." I created a single column, with two DataTemp
TAG : wpf
Date : January 10 2021, 01:57 PM , By : Igor Carron
WPF DatePicker IsEnabled property not changing appearance
WPF DatePicker IsEnabled property not changing appearance
hope this fix your issue I solved this by explicitly setting DatePicker's visual style in IsEnabledChanged handler:
TAG : wpf
Date : January 10 2021, 01:49 PM , By : user160048
Can a custom WPF control implement the IsDefault property
Can a custom WPF control implement the IsDefault property
wish helps you All that setting Button.IsDefault does is call AccessKeyManager.Register("\r", this) (or Unregister if setting to false). (Actually, it does a little bit of extra work around focus management, but that's probably not crucial for you.)S
TAG : wpf
Date : January 10 2021, 01:49 PM , By : user165781
Strange Behaviour WPF TreeView ItemContainerStyle and ItemTemplate
Strange Behaviour WPF TreeView ItemContainerStyle and ItemTemplate
seems to work fine TreeViews work differently. The Items inside a HierarchicalDataTemplate are TreeViewItems and any control you specify inside the HierarchicalDataTemplate will function as its Header. So, basically you are specifying that the Items
TAG : wpf
Date : January 10 2021, 01:47 PM , By : Steve Jones
what's the difference between MVVM and Prism v2
what's the difference between MVVM and Prism v2
To fix the issue you can do Prism is not a design pattern, but a Library of different components; some of them can help you implementing the MVVM-pattern, for example with Commanding.
TAG : wpf
Date : January 10 2021, 01:45 PM , By : Techspirit
WPF DataGrid multiselect binding
WPF DataGrid multiselect binding
Hope this helps Andy is correct. DataGridRow.IsSelected is a Dependency Property that can be databound to control selection from the ViewModel. The following sample code demonstrates this:
TAG : wpf
Date : January 10 2021, 01:45 PM , By : 40a
Bind two Textboxes to one and the same Checkbox
Bind two Textboxes to one and the same Checkbox
may help you . TextBox "txtKeineHv" has local value for Visibility: Visibility="Hidden"Style trigger cannot override it.
TAG : wpf
Date : January 08 2021, 10:52 AM , By : vasil
How to bind a DataTemplate datatype to a View which receives ViewModels a dependency injected by DI
How to bind a DataTemplate datatype to a View which receives ViewModels a dependency injected by DI
This might help you I have a WPF application which implements navigation using MVVM, filling a different DataTemplate for each View within the same Window e.g. : , DataTemplate
TAG : wpf
Date : January 08 2021, 10:52 AM , By : Cowtung
How to start using MvvmLight on a .net core 3 WPF app?
How to start using MvvmLight on a .net core 3 WPF app?
With these it helps What exactly do you mean by 'it isn't complete in my case'? Do you get any errors when building the project?I'm using MvvmLight in my projects too. As an example:
TAG : wpf
Date : January 02 2021, 06:48 AM , By : scotta01
Set Button Click handler with a DataTrigger
Set Button Click handler with a DataTrigger
it should still fix some issue Is there a reasonable way to change Button.Click from XAML in response to a changing data value?
TAG : wpf
Date : January 02 2021, 06:48 AM , By : Kuer
Remove lines between rows in WPF grid
Remove lines between rows in WPF grid
will help you I have the following XAML in a WPF application. There are white horizontal lines between the rows. Is there anything that can be done to remove them? , Set SnapsToDevicePixels on your top-most Grid:
TAG : wpf
Date : January 02 2021, 06:48 AM , By : Chris Lomax
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 : January 02 2021, 06:48 AM , By : David
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 : January 02 2021, 06:48 AM , By : Ben Brown
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 : January 02 2021, 06:48 AM , By : WuJanJai
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 : January 02 2021, 06:48 AM , By : Robert Daniel Pickar
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 : January 02 2021, 06:48 AM , By : Chris Woods
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 : January 02 2021, 06:48 AM , By : quicky
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 : January 02 2021, 06:48 AM , By : user107021
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 : January 02 2021, 06:48 AM , By : user140973
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 : January 02 2021, 06:48 AM , By : CHeMoTaCTiC
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 : January 02 2021, 06:48 AM , By : Dré
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 : January 02 2021, 06:48 AM , By : bjorngylling
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 : January 02 2021, 06:48 AM , By : Hans-Inge
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 : January 02 2021, 06:48 AM , By : Michael
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 : January 02 2021, 06:48 AM , By : Asbie
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 : January 02 2021, 06:48 AM , By : JulianCT
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 : January 02 2021, 06:48 AM , By : mlapida
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 : January 02 2021, 06:48 AM , By : user180941
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 : January 02 2021, 06:48 AM , By : alexandruz
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 : January 02 2021, 06:48 AM , By : Der Ketzer
Setting a theme in WPF
Setting a theme in WPF
around this issue Add the theme.xaml file to your project(right click->Add Existing Item...). Then in your App.xaml file add the following code
TAG : wpf
Date : January 02 2021, 06:48 AM , By : foxthrot
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 : January 02 2021, 06:48 AM , By : Alecsandru Soare
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 : January 02 2021, 06:48 AM , By : Rohii
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 : January 02 2021, 06:48 AM , By : simonth
DataGridCheckBoxColumn immediate binding
DataGridCheckBoxColumn immediate binding
I think the issue was by ths following , You have to set the UpdateSourceTrigger property of the Binding to PropertyChanged. The default is LostFocus.
TAG : wpf
Date : January 02 2021, 06:48 AM , By : tanminivan
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 : January 02 2021, 06:48 AM , By : Shitic
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 : January 02 2021, 06:48 AM , By : user137798
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 : January 02 2021, 06:48 AM , By : Techspirit
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 : January 02 2021, 06:48 AM , By : Navin
bind a WPF datagrid to a datatable
bind a WPF datagrid to a datatable
Any of those help The project I was developing was on a (corporate) network drive. If I move the project to my local C: drive the error goes away.
TAG : wpf
Date : January 02 2021, 06:48 AM , By : afds
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 : January 02 2021, 06:48 AM , By : Gabriel
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 : January 02 2021, 06:48 AM , By : Stephen
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 : January 02 2021, 06:48 AM , By : yogan
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 : January 02 2021, 06:48 AM , By : user124112
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 : January 02 2021, 06:48 AM , By : somebody
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 : January 02 2021, 06:48 AM , By : tayles
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 : January 02 2021, 06:48 AM , By : nd27182
Some doubts in WPF
Some doubts in WPF
will help you Routed Event is event that design for tree of elements, when routed event raise it can travel up (bubbling) and down (tunneling) the element tree. For example if you have button inside grid, and you click button so route can raise up th
TAG : wpf
Date : January 02 2021, 06:48 AM , By : Sharad
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 : January 02 2021, 06:48 AM , By : user187301
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 : January 02 2021, 06:48 AM , By : Zelos
WPF Validation & IDataErrorInfo
WPF Validation & IDataErrorInfo
hop of those help? This may be a silly answer, but by default the binding calls the setter when LostFocus happens. Try doing that if you haven't done that.If you want the error code to be triggered on every key press, Use UpdateSourceTrigger=Property
TAG : wpf
Date : January 02 2021, 06:48 AM , By : Rik
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 : January 02 2021, 06:48 AM , By : amorican
Playing audio files in WPF
Playing audio files in WPF
will help you Your MediaPlayer object is probably being garbage collected before it has a chance to play the file because it has local scope. Try making the media player object a member variable of a class that has application lifetime and see if thi
TAG : wpf
Date : January 02 2021, 06:48 AM , By : Florian D.

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