mvvmlight | main purpose of the toolkit is to accelerate the creation | Form library

 by   lbugnion C# Version: V5.3_source_code License: MIT

kandi X-RAY | mvvmlight Summary

kandi X-RAY | mvvmlight Summary

mvvmlight is a C# library typically used in User Interface, Form, Xamarin applications. mvvmlight has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

The main purpose of the toolkit is to accelerate the creation and development of MVVM applications in Xamarin.Android, Xamarin.iOS, Xamarin.Forms, Windows 10 UWP, Windows Presentation Foundation (WPF), Silverlight, Windows Phone.
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              mvvmlight has a medium active ecosystem.
              It has 1139 star(s) with 312 fork(s). There are 67 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 57 open issues and 30 have been closed. On average issues are closed in 89 days. There are 17 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of mvvmlight is V5.3_source_code

            kandi-Quality Quality

              mvvmlight has 0 bugs and 0 code smells.

            kandi-Security Security

              mvvmlight has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              mvvmlight code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              mvvmlight is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              mvvmlight releases are not available. You will need to build from source code and install.
              Installation instructions are available. Examples and code snippets are not available.

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            mvvmlight Key Features

            No Key Features are available at this moment for mvvmlight.

            mvvmlight Examples and Code Snippets

            No Code Snippets are available at this moment for mvvmlight.

            Community Discussions

            QUESTION

            How can I change IsInDesignMode to use it in Microsoft.Toolkit.MVVM?
            Asked 2022-Mar-27 at 12:11

            This time I must be migrate MVVMLight and replace it with Microsoft.Toolkit.MVVM.

            In the documentation is written there's no direct replacement for IsInDesignMode, altered or remove it.

            I don't know any option to alter it, can anyone help me ?

            ...

            ANSWER

            Answered 2022-Mar-27 at 10:02

            The general idea would be as follows, WPF for instance:

            Source https://stackoverflow.com/questions/71634846

            QUESTION

            CommandParameter not passed to CanExecute when databound within a DataGrid (CanExecute parameter is null)
            Asked 2022-Jan-27 at 19:37

            I am using the Microsoft.Toolkit.Mvvm nuget package for building out a WPF application on .NET Core 3.1.

            I'm having an issue with binding the CommandParameter of a button within a DataGridTemplateColumn of a Datagrid.

            I have a RelayCommand defined on my viewmodel, using IRelayCommand, and have a CanExecute method defined that takes a parameter. I then have the CommandParameter of the button binding bound to the data of the datagrid row.

            During runtime, I am seeing the CanExecute method called for every row of my datagrid, however the parameter value is always null. If I have 5 items in my ObservableCollection, I see CanExecute called 5 times, 3 items... 3 times. In all cases the value is null.

            Below is the code for my viewmodel that creates an ObservableCollection of TestModel types. A RelayCommand is created, and the criteria of the CanExecute is dumbed down to just comparing the name property of the databound model.

            What I'd expect here is that for all rows except the row with name "Test2", the bound button would be enabled. The button in Test2's row would be disabled.

            Here is my viewmodel, and related model class.

            ...

            ANSWER

            Answered 2022-Jan-27 at 19:37

            What am I missing here?

            The fact that CanExecute is called before the CommandParameter has been set.

            Changing the binding to this seems to work for me:

            Source https://stackoverflow.com/questions/70857382

            QUESTION

            C# JsonIgnore to basic class
            Asked 2022-Jan-19 at 14:05

            I have class

            ...

            ANSWER

            Answered 2022-Jan-19 at 13:53

            You could define a custom contract resolver to ignore the properties. For example,

            Source https://stackoverflow.com/questions/70771489

            QUESTION

            Declaring Design-Time ViewModel for Avalonia Window
            Asked 2021-Dec-11 at 23:45

            I'm looking for the right approach to declare design-time ViewModel for an Avalonia window.

            Some samples suggest

            ...

            ANSWER

            Answered 2021-Dec-11 at 23:45

            Unable to find public constructor for type Demo.CloseNonModalDialog:Demo.CloseNonModalDialog.CurrentTimeDialogViewModel()

            You can specify arguments via x:Arguments XAML directive, see https://docs.microsoft.com/en-us/dotnet/desktop/xaml-services/xarguments-directive

            That's an option, although I haven't yet found the right way to declare and reference the resource.

            I'd suggest to declare DesignData class and use x:Static, it will give you way more flexibility. e. g.

            Source https://stackoverflow.com/questions/70319722

            QUESTION

            GalaSoft MvvmLight not disabling UserControl with RelayCommand
            Asked 2021-Dec-04 at 11:41

            I'm building a simple application using WPF and GalaSoft MvvmLight (5.4.1.1).
            Everything works fine, I have a grid, and when a row is selected I enable/disable buttons that have actions assigned.

            Sample button looks like that:

            ...

            ANSWER

            Answered 2021-Dec-04 at 11:41

            Note: this is not related to MvvLight at all.

            The WPF ButtonBase class has hard-coded support for evaluating Command.CanExecute to provide a value for the IsEnabled property. See also IsEnabledCore in the source code.

            There is not such support for UserControl, so you have to bind IsEnabled yourself.

            That said, you could - instead of defining a user control - use a Button control with custom control template.

            Source https://stackoverflow.com/questions/70153824

            QUESTION

            The KeyDown event will not fire, but the exact same code with PreviewMouseLeftButtonDown event will
            Asked 2021-Jul-08 at 13:46

            I am currently working with WPF to create a simple minigame which requires pressing keys. I have done something similar with mouse clicking, yet I am struggling with keys. I have searched for a quite some time and I have found out that the most common way to work with keys is to define each key to its own event. But thats not my case and I want it to be able to fire it everytime any key is pressed. I have found out that this is possible to be done with MVVMLight and EventToCommand, but for some uknown reason to me, the KeyDown event will not fire (neighter KeyUp), but PreviewMouseLeftButtonDown will do.

            xaml file:

            ...

            ANSWER

            Answered 2021-Jul-06 at 13:16

            There is a PreviewKeyDown event that you can try. The most common reason why it won't work with KeyDown and MouseDown is that the control already handles key presses and mouse interactions internally.

            The PreviewKeyDown event will only be fired when the control is focused so you'll also have to set the Focusable property of the UserControl to true.

            A better way to make sure that you always capture keypresses in a UserControl would be to handle the keypress event of the parent window programmatically:

            Source https://stackoverflow.com/questions/68270545

            QUESTION

            DelegateCommand RefreshCommand to refresh ObservableCollection-bound DataGrid
            Asked 2021-Jun-22 at 09:37

            I'm trying to update my DataGrid (name: dgLicenseholder, bound to an ObservableCollection. I am using MVVMLight) when I add new rows to the database. Why isn't this working?

            In my ViewModel, I have a public DelegateCommand RefreshCommand {get; private set; } and a method:

            ...

            ANSWER

            Answered 2021-Jun-21 at 14:15

            Okay there's much that I don't see here on how the database code is linked to your code but this might help:

            Source https://stackoverflow.com/questions/68065004

            QUESTION

            Delete selected row in DataGrid bound to an ObservableCollection
            Asked 2021-Jun-15 at 12:02

            I'm writing an app in WPF, trying to use the MVVM-design pattern (which is new to me). I have a DataGrid bound to an ObservableCollection.

            What I'm trying to achieve:

            Delete the currently selected DataGrid-row using a 'Delete'-button. I've tried a plethora of forum-posts and videos to find a solution. The solution has probably stared me right in the face several times, but at this point I'm more confused than I was when I first started.

            Any assistance would be appreciated.

            ViewModel (updated with working code, thanks to EldHasp):

            ...

            ANSWER

            Answered 2021-Jun-14 at 20:15

            You can use Prism. Intall package Prism.Core then Install-Package Microsoft.Xaml.Behaviors.Wpf -Version 1.1.31 packages in your project, in your xaml declare namespace as - xmlns:i="http://schemas.microsoft.com/xaml/behaviors"

            Source https://stackoverflow.com/questions/67976219

            QUESTION

            WPF - MVVM: how to draw a movable Rectangle with mouse
            Asked 2021-May-24 at 18:04

            I'm new on WPF and I want to create a program using MVVM pattern (without using external library like MvvmLight). The application let the user to draw rectangles (and other shapes in future) inside canvas using mouse (similar to Windows Paint, just to be clear). The user could move/resize created rectangles using mouse interaction as well.

            At this moment I implemented a basic version in which the user can add a rectangle (with random size/position) by clicking a button. This is the code of the MainWindow view which implement this behaviour:

            ...

            ANSWER

            Answered 2021-May-24 at 18:04

            MVVM pattern is just a desired pattern to separate visual design from applicaton data structure, so when you say "MVVM pattern doesn't allow to put event handler (for mouse interaction) in view code-behind" maybe that is being too drastic. Try to stick to it for better designs but don't get too crazy at the beginning. Have a look at this page, it might be of interest.

            WPF creates automatically the event handlers for you in the code behind, so that is the place for them. What you may want to do is to, instead of modifying your data directly inside your event handler, there will be a ViewModel whose methods will help you modify your data.

            You can use the PreviewMouse(Up,Down,Move) events associated to the Canvas. It might be easier than trying to click on your shape, specially when several shapes may overlap. Obviously, if you have many shapes, there must be a way to know which shapes is going to be edited (manual selection through combobox, finding the closes shape to mouse click, etc)

            From your design, one aspect that may give you some trouble is the fact that your viewModel manages 1 shape. It isn't wrong, but you need another VM layer that manages a collection of shapes. It can be done as another class or as a bunch of static methods in your MyRectViewModel:

            Source https://stackoverflow.com/questions/67674284

            QUESTION

            EF6 internal connection and transaction lifecycle issue
            Asked 2021-Apr-30 at 18:05

            I'm troubleshooting a laundry list of exceptions that have recently begun to occur- We have a "single-use" service which we wrapped a bulk service around. The bulk service sets up all the variables required for each iteration, etc... The other variables are non-Entity/non-EF related. Roughly speaking:

            ...

            ANSWER

            Answered 2021-Apr-30 at 18:05

            Thanks to @Gert Arnold's suggestion of disabling proxy creation, I was able to pinpoint that as the smoking gun which fixed the problem.

            Working with proxies - EF 6 Microsoft Docs

            I found that with proxy creation disabled, it was not necessary to override the SaveChanges() method with the Transaction wrapper. That should match the default EF behavior anyway.

            For completeness and for those finding themselves here in the future:

            You can disable proxy creation in the initializer of your DbContext class as such:

            Source https://stackoverflow.com/questions/67307574

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

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            Install mvvmlight

            More information about the MVVM Light Toolkit can be found on http://www.mvvmlight.net.

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