clr | A command to create colorlists files | Command Line Interface library
kandi X-RAY | clr Summary
kandi X-RAY | clr Summary
A command to create colorlists files
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QUESTION
I have a WPF app, linked to a SQL-server. I am using the MVVM-light package (I do actually have Prism.Core installed, but I'm not sure if I'm using it or not.... new to MVVM).
There's a DataGrid
, bound to an ObservableCollection
.
I have been trying to implement the PropertyChangedEventHandler
, but I can't seem to get it to work.
I have a Delete button bound, and I am able to remove rows, but when I re-open the form, the changes does not carry over.
I tried to change the binding-mode for the DataGrid
from OneWay
to TwoWay
. With OneWay
, the changes does not carry over when I re-open the form. With TwoWay
, I get this error message when opening the child form (which contains the DataGrid
):
System.InvalidOperationException: 'A TwoWay or OneWayToSource binding cannot work on the read->only property 'licenseHolders' of type 'Ridel.Hub.ViewModel.LicenseHoldersViewModel'.'
So, If I then add a set;
to my public ObservableCollection licenseHolders { get; }
,
the program runs, but the previous problem persists, like it did when there was a OneWay
mode configuration on the DataGrid
.
What do I need to do to get this to work without communicating directly with the Sql-server
, which would defy the whole point of using this methodology in the first place?
ANSWER
Answered 2021-Jun-15 at 13:26You are confusing topics. The VM needs InotifyPropertyChanged
events, which you have but are not using, to notify the Xaml in the front-end that a VMs property has changed and to bind to the new data reference.
This is needed for List
s or ObservableCollection
s. Once that is done, the ObservableCollection
will then send notifications on changes to the list as items are added or removed.
Because you miss the first step:
QUESTION
im trying to get Highscores from a File and display them in a RecyclerView. But im getting the following Error:
...ANSWER
Answered 2021-Jun-15 at 11:00You mistype the recycler_style.xml
, the id must be specified in the android:id
property and not in android:layout_width
QUESTION
I try to populate a Labeltext inside a Listview in XAML. But i want the Labeltext coming from the AppResources. I am shure i forgot somewhere a tiny lil detail like a using or namespace.
Anway, here's the XAML:
...ANSWER
Answered 2021-Jun-13 at 19:13use the x:Static extension
QUESTION
I got a button (using MaterialDesign theme) in a WPF form button that is not styling correctly, where am I going wrong?. The button in the DataGrid is fine. I tried near Window on mainWindow doing Foreground="white" but when I take the theme off everything returns to nornal WPF form with the text colour (lower right) missing
app.xamp:
...ANSWER
Answered 2021-Jun-13 at 07:00it was because of Padding="15"
must've pushed the content outside the button area
QUESTION
So, I have this big application that does some long work on the UI Thread. I know it's bad design, but this can't be changed. Thake it as a constraint.
To show the progress of the work, I want to show a WPF dialog with a progressbar. The dialog is using DataBindings to DependencyProperties for its labels and the progressbar.
When I first called Show()
on the dialog instance, the dialog wouldn't be displayed, because the Dispatcher is busy working on the long running task. So I called Dispatcher.Yield()
after Show()
. I also call Yield()
after each update of the DependencyProperty of the progressbar. The dialog windows is showing up, but it's still very empty. The DataBindings are not updated on Dispatcher.Yield()
.
Is there any chance I can get them to update while the Dispatcher is busy?
Example AppCreate a new .NET Framework WPF App, name it 'BusyProgress' and change these files.
MainWindow.xaml ...ANSWER
Answered 2021-Jun-11 at 09:47Building the example helped to realize that this answer was in fact enough.
My app had another constraint that I didn't realize before. The Dispatcher was disabled -.-... Thank you sintar for your help!
QUESTION
I have the below code for doing a POST request to a REST API end point to update SAP application data.
...ANSWER
Answered 2021-Jun-11 at 09:23your POST code is fine.
problem not in content size , but in a way you are building json payload.
you have doublequotes in content
so, using string interpolation for json building like this:
QUESTION
I am trying to understand how the RelativeSource
works.
With the setup below I'd expect to see the text "I am the MainViewModel" displayed on the form, however I see an error in the debugger and no text on the MainWindow
:
Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='UnderstandingBindings.ViewModels.MainViewModel', AncestorLevel='1''. BindingExpression:Path=SomeProperty; DataItem=null; target element is 'TextBlock' (Name='myText'); target property is 'Text' (type 'String')
I have a ViewModel like this:
...ANSWER
Answered 2021-Jun-10 at 13:19wpf looks for the Ancestors of the xaml element the binding is declared on. You can think of it as walking up the Visual Tree.
You'd use it to Bind to a property thats on that Ancestor or have to bind to a viewmodel by going through it's DataContext Property. So for example:
QUESTION
I'm loading a class library dll with pythonnet that is based on .NET 4.5, probably written in VB. I can instantiate the the most relevant class (SDK
), create objects needed as method arguments and call the methods.
ANSWER
Answered 2021-Jun-10 at 11:41Python can not represent C#'s ref T
type when T
is a value type. Instead, when you access res.ColorRenditionIndexes
you get a copy of its value.
A workaround is to assign in 3 steps:
QUESTION
I got a simple UserControl
that is basically just a Grid with 6 Columns and a bunch of TextBlocks.
XAML:
...ANSWER
Answered 2021-Jun-10 at 10:23The UserControl constructor with TimeAccount argument is missing an InitializeComponent
call:
QUESTION
With getAllCars() function i get all cars from a bckend webapi and I save them in ObservableCollection Cars. When I run the application it doest show any data.I dont know why the data are not showed please any one to help?...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
MainWindow.xaml ...ANSWER
Answered 2021-Jun-10 at 10:02You must not declare and call an async void
method in a view model.
Declare it as async Task
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