Questions tagged [wpf]

WPF is a graphical subsystem for rendering user interfaces in Windows-based applications.

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1answer
59 views

How can I implement Windows close in MVVM pattern? [closed]

I'm newer to MVVM design pattern with WPF .Net Framework I have a : Model ( Student ) View Model (StudentViewModel ) RelayCommands MainWindow.xaml.cs MainWindow.xaml Everything works fine and I have ...
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1answer
56 views

Inter application communication .Net

I have multiple WPF applications running different programs some of them are interconnected so one might have to start another at some stage. I need a way to communicate and share large amounts of ...
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2answers
116 views

Application made up of multiple executable programs

I am developing an engineering application (WPF, C#) that consists of a collection of other programs that perform specific engineering tasks. I guess you can think of it like Microsoft Office, however ...
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1answer
45 views

WPF MVVM using TPL - should I handle exceptions in the back or front end?

I have a WPF MVVM application, the WPF is the UI frontend and I have another project in the same solution that does DB access, I do this by starting a Task from the frontend that executes the backend ...
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1answer
150 views

DbContext lifetime in desktop app with SQLite

I am creating a small data-driven desktop application using .NET 5 with WPF, ReactiveUI, Dynamic Data, and EF Core 5. The app uses a local SQLite database to store all persisted state, and relies ...
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52 views

Is it secure to make a seperate project which checks whether a license is active

I am trying to make a project which will help me to implement feature based licensing in future projects. The projects in this solution are C#/WPF Projects. So I have a Helper-Project with a class &...
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2answers
63 views

How to edit and monitor changes in a complex Datamodel

I'm working on an Editor-GUI (C#, WPF, Windows-Desktop) for a quite complex domain model. The domain model consists of many different node types mainly coupled in a hierarchie. Also it is possible to ...
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0answers
40 views

Should all interactions go to ViewModel?

So basically I guess I know the role of MVVM, but correct me if I am wrong View: Basically it whats the users sees + it takes user interaction Also View: It shouldn't know what the model is ... but it ...
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0answers
44 views

Inconsistent data between different viewmodels

Im building mainly WPF applications. I noticed a "problem" with inconsistent data. Usually I have a ViewModel, the VM has a load method, which gets data from the database, the user can edit ...
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1answer
104 views

Communication mechanism among windows or pages WPF

I work with C# and WPF and not using MVVM approach. One of the important part of applications is communication among Windows Pages and UserControls. In MVVM they do it behind the scenes and let you ...
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1answer
338 views

MVVMCross multiple ViewModels and Views per Window

I may not being fully understanding MVVM or how MVVMCross works, but my understanding of views is that they are components of a window rather than the window itself. When you start up MVVMCross in C# ...
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2answers
102 views

Is it right way to make Window to Singleton and call Visibility and Shutdown() methods directly in WPF?

There is a parent window that is the basis of the program, and there are several sub windows under it. Editor is one of the sub window and I'm making it. The code is as follows: // This is Code-Behind ...
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2answers
324 views

What is the proper way to handle with View and ViewModel in WPF?

Currently, I'm making an Editor with MVVM pattern in WPF. Editor simply take an instance of a specific type as a reference and modifies it. The following code is the expected usage when editor ...
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71 views

Is a lot of Wiring code a sign of over engineering or bad design?

We have a classic wpf line of business software at work. Put in a lot of data, save it, calculate some things, put out some useful data etc. Visually we have a dockable pane setup, like visual studio ...
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5answers
4k views

WPF UserControl Reuse With MVVM

I'm struggling to find an elegant and idiomatic way of coding the following scenario using the MVVM paradigm in WPF and was wondering how other people would approach it. I have a UserControl in my ...
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1answer
117 views

CRUD actions rexponsibility in the MVVM

In Form-based application (WPF/MVVM/SQLServer), consider the form that handles the classical actions that you can perform on any entity. Create Read Update Delete The problem, in general terms, is ...
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1answer
79 views

Structuring code to support console output and WPF views

Premise: This is for learning purpose. I'm trying to adapt my Console Application code to be served through a WPF Application GUI that I would like to create. One problem is struggling me. Actually ...
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3answers
581 views

Better way than singleton pattern to ensure single instance of class

When this question has been asked before on StackOverflow in 2011 and 2015, all answers as of now suggest to use a Singleton. But that’s not right. Singletons are defined by the Gang of Four to ...
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1answer
76 views

Best practice for populating a property of an entity object which requires a second database call

I'm running a commercial accounting software packages which uses a SQL server database. I've also developed a WPF application which is basically a slimmed down version of the commercial software. ...
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2answers
83 views

Subscribing to events in factory — better place?

I'm implementing an event-driven game in WPF and have the following Blackjack class: public class Blackjack { public Dealer Dealer { get; } = new Dealer(); public Player Player { get; } = new ...
2
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1answer
78 views

Provide overall application status in global exception handler/crash report

In my UI application (WPF/C#, using MVVM design pattern), I have implemented a global exception handler which catches all unexpected (hence uncaught) exceptions and reports the application crash to ...
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2answers
816 views

Throttling notifications from child ViewModel to parent ViewModel

I have a child view-model which notifies on a property change: public class ChildViewModel : INotifyPropertyChanged { private bool isSelected; public bool IsSelected { get => ...
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2answers
1k views

Is it okay to pass my model into my view model via its constructor through MVVM practices?

public class LDLTrackViewModel : RailwayViewModel { private LDLTrack _ldlTrack; public LDLTrack LDLTrack { get => _ldlTrack; set { _ldlTrack = value; ...
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4answers
910 views

Why does C# not have automatic dispatchers

Why does C# make you put in a dispatcher for a different thread to update the UI? Example: Dispatcher.Invoke(() = { lblerrorName.Content = ""; }); It always gives the 'running on different ...
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1answer
217 views

Where do I save a Canvas “center position” coordinate in an MVVM architecture?

Assume I have a canvas that has rendered shapes. I can drag-move around that canvas as if I was in a zoomed in image to move all shapes around. Between the Model and ViewModel I have a ServiceLayer (...
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3answers
873 views

How to avoid duplication of types in MVVM

I'm learning the MVVM pattern and something that comes up often is a duplication of data-types. Say I have a Person datatype. Intuitively I want it to look like this: public class Person { ...
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1answer
227 views

Designing a WPF / MVVM architecture where view behavior changes in different states

As part of my bachelors thesis, I'm trying to develop something akin to a painting program. That means, I have a toolset, be it selection, drawing, highlighting, etc. I'll have a canvas that displays ...
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0answers
718 views

.NET WPF Best way to store a connection credential

I have an application that connects to SQL Server using windows credentials, which works very well for the domain paradigm. The client is now transitioning away from having a domain server, and is ...
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1answer
35 views

Separate or not separate(Window and datagrid)?

I am new to WPF but actually I need to code in it. I have got a **UserControl(Window)** and there is a DataGrid in it. DataGrid can be used somewhere else in the future, but not 100% sure. Me and one ...
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3answers
864 views

Keeping objects in RAM vs more queries to the database

So this is my DataStructure: Project - Name - ID - Image - History - User - Comment When my application first starts it is pulling all projects with all details. obviously ...
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1answer
174 views

Unit testing for a method in a class which uses constructor DI (prism)

I have a class that uses constructor DI for IEventAggregator public SomeViewModel(IEventAggregator eventAggregator) { this.eventAggregator = eventAggregator; ...
6
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1answer
3k views

Why can’t ViewModels communicate with each other?

Can someone explain concretely why it is not desirable for ViewModels to communicate directly with other view models? It seems to me that for virtually any UX application there will be a “root” view (...
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1answer
110 views

How to propagate Setting Class throughout entire project [closed]

Here's my setup: Entity Framework Backend Large WPF project that has a main window with 3-4 user controls on it, each of which has 3-4 user controls on it (and so on, in some cases) What I currently ...
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1answer
2k views

When to use The Messenger (Mediator) Pattern in MVVM design

I got confused with the role of the Messenger in MVVM. I see contradictory articles about it. This Article by MSDN by: Communicating from the View-Model to the View Observant readers will ...
5
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1answer
652 views

Where is it better to implement Copy/Cut/Paste in MVVM?

I am working on a project using C#/WPF and following MVVM pattern. This project is designed for touch screens. The major objects of the program are the following: We have Programs which contain ...
0
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1answer
997 views

Giving Viewmodels access to application wide Model in MVVM

I am practicing building applications using MVVM and WPF+C# by making a "finance application". The application contains several views with their own ViewModels. The views are in a hierarchy and are ...
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1answer
1k views

Wpf Application Structure? C#

I'm trying to port an application of mine from Java to C# and I can't for the life of me wrap my head around Wpf application structure. In Java my application runs the main() method which registers ...
2
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1answer
243 views

How to optimize a complex task with multiple DB calls

I have been working on a multi-layer, sale management application developed with WPF and partly refactored with EF6 (long story). The application has some very complex tasks which require multiple ...
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2answers
1k views

How to unit test this converter?

I am beginning with unit testing in c#. Here is my converter: public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { int c = 0; if (value != null) {...
0
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1answer
700 views

Dynamically injecting views with PRISM and WPF

I am writing application that will visualize some data. I will create custom user controls ( graphs,charts,tables ) for visualization. Now,to simplify it let's say, I want to have architecture like ...
10
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5answers
10k views

Moving from Qt/C++ to C#/WPF - Productivity Gain?

I created a small Desktop application (approx 15000 lines of code, so not that large) written in C++/Qt. This is non-commerical, just a hobby project and I am coding on my free time. The larger the ...
3
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0answers
142 views

Should I build a custom text editor from scratch or enhance existing ones?

I'm developing a Windows WPF app that needs to edit a certain type of document and I need a highly customized editor to do so: The text is a transcription of an audio feed, and I need to sync the the ...
10
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3answers
9k views

Is it good practice to use user controls to structure WPF forms even if these user controls are only used once?

I develop a WPF application using MVVM and I am learning how to do things best. I have a WPF form with selectors, two list with search fields, and some other elements. Currently all is in one form ...
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0answers
497 views

WPF DI with DbContext per form

Trying to figure out how to keep class methods clean, follow EF's guidance of short-lived DbContexts, and use DI in WPF. Issue I'm having is implementing transactions with DI. I'm trying to figure ...
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0answers
335 views

Should I populate view model inside or before creating it

I'm not sure if softwareengineering exchange is right for the question. I need to populate view model with some values I query from the database. I do it like: var db = new NPoco.Database(...
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2answers
173 views

It's safe to access to the database and querying from it directly if it's on the server side, if not what should i do? [closed]

I made WPF application for a client-side and hosting database in a server side , I know there is something called REST API to transfer data between a client and server I don't know this method and ...
0
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1answer
125 views

Architecture for distributed real time traffic capturing/viewer system

I have a scenario as following (you can think of it as a distributed Wireshark system): For a single capturing session, there are about 1 ~ 10 traffic capturing nodes distributed in a LAN network. ...
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2answers
920 views

MVVM. Is it a code smell when view model has properties with names show/hide/display that semantically belong to view?

I've lately been involved with WPF and looked into MVVM. I understand that view model shouldn't be aware of view. However, sometimes I come across situation where my initial instinct is to write ...
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1answer
2k views

WPF, Dialog Service as injectable Service or a Static class

The background In MVVM, we tend "not" want to couple windows to view models for various reasons. Though from the very second screen on your application you start hitting this conceptual grey zone. ...
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2answers
846 views

Dealing with stale data persistence

Currently implemented the model and working on the UI for a scheduling application. This is just an in-house application for work between ~5 people that may occasionally have the application running ...

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