PropertyChanged | Injects INotifyPropertyChanged code into properties

by Fody C# Version: 4.1.0 License: MIT

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kandi X-RAY | PropertyChanged Summary

PropertyChanged is a C# library. PropertyChanged has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

(the actual injected type and method names are different).

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Support

PropertyChanged has a medium active ecosystem.

It has 1725 star(s) with 222 fork(s). There are 73 watchers for this library.

It had no major release in the last 12 months.

There are 0 open issues and 356 have been closed. On average issues are closed in 45 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of PropertyChanged is 4.1.0

Quality

PropertyChanged has no bugs reported.

Security

PropertyChanged has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

PropertyChanged is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

PropertyChanged releases are available to install and integrate.

Installation instructions, examples and code snippets are available.

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PropertyChanged Key Features

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PropertyChanged Examples and Code Snippets

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Community Discussions

Trending Discussions on PropertyChanged

MVVM WPF - How to update DataGrid bound to ObservableCollection

Delete selected row in DataGrid bound to an ObservableCollection

Count Duplicates and sum values in datagridview in C#

UWP AdvancedCollectionView filter not working with strings

WPF MVVM binding command to Datacontext inside Datagrid

Deserializing XML and Getting an Error in XML Document (2, 2)

I have implemented MVVM pattern in wpf. But the result doesnt showed in the view. Can some one please help me?

ListView Cell Binding not finding Methods in Collection

C# WPF INotifyPropertyChanged not updating form

DataGrid MultiSelect bound to ObservableCollection unstable when ObservableCollection is modified in the ViewModel

QUESTION

MVVM WPF - How to update DataGrid bound to ObservableCollection

Asked 2021-Jun-15 at 17:35

What I'm trying to do:

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?

ViewModel: ...

ANSWER

Answered 2021-Jun-15 at 13:26

You 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 Lists or ObservableCollections. 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:

Source https://stackoverflow.com/questions/67986693

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

Count Duplicates and sum values in datagridview in C#

Asked 2021-Jun-15 at 09:55

I'm trying to Count up and delete the duplicates rows when a new row is added, and if the row does not exist it should make a new row for it. If a new row is added and is the same as one of the existing ones is would add it to the count.

It should look for if: 'Code' is the same and if the 'Part' is the same.

What I'm getting:

Updated code now: CodeCombox has been replaced with textBoxScanner.

...

ANSWER

Answered 2021-Jun-14 at 14:33

One solution is to use a BindingList with a concrete class rather than work directly from the DataGridView. In the following sample there are two ComboBox controls for Code and Parts, a TextBox for Count.

Class to store information

Source https://stackoverflow.com/questions/67970476

QUESTION

UWP AdvancedCollectionView filter not working with strings

Asked 2021-Jun-15 at 09:31

I have a AdvancedCollectionView from Windows Community Toolkit version 6.1.1 and trying to use it to filter out on 2 string properties.

I have created a simple app to reproduce the issue : https://github.com/touseefbsb/UWP-Filter-List

It has a textbox for filtering between StartNumber and EndNumber properties of items.

but as soon as I enter text "123" into it, it shows no item in the ListView when it should actually show only the first item, based on the test logic.

Code

MainPage.xaml

...

ANSWER

Answered 2021-Jun-15 at 09:31

I'm afraid you can't use Filter in TextChanged event, please refer the source code here.

Source https://stackoverflow.com/questions/67967567

QUESTION

WPF MVVM binding command to Datacontext inside Datagrid

Asked 2021-Jun-14 at 09:42

I'm creating a WPF Molds app that contains 2 windows: MainWindow with DataGrid, and AddEditWindow which allows to Add/Edit Molds.

I have a EditButton which located in a TemplateColumn of DataGrid:

...

ANSWER

Answered 2021-Jun-14 at 08:37

In a Code-Behind, I could done something like this:

Take a closer look at your XAML.
You have a binding set in the CommanParameter property.
The binding instance is empty - this means that the binding occurs to the DataContext of the element in which it is specified.
Hence, in the command parameter, you will get this Data Context.

Source https://stackoverflow.com/questions/67959671

QUESTION

Deserializing XML and Getting an Error in XML Document (2, 2)

Asked 2021-Jun-12 at 00:21

I have an XML file I am reading from and trying to deserialize into an object. I get this error when I try:

System.InvalidOperationException: 'There is an error in XML document (2, 2).' InvalidOperationException: was not expected.

Here is the XML file:

...

ANSWER

Answered 2021-Jun-11 at 17:40

I think there are a number of issues here, more specifically with the Generated Code for the XML.

In Visual Studio, I created a new Class and copied your XML content and used Edit -> Paste Special -> Paste XML as Classes.

Here's the generated code from that exercise:

Source https://stackoverflow.com/questions/67939785

QUESTION

I have implemented MVVM pattern in wpf. But the result doesnt showed in the view. Can some one please help me?

Asked 2021-Jun-10 at 10:04

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

image of window

...

ANSWER

Answered 2021-Jun-10 at 10:02

You must not declare and call an async void method in a view model.

Declare it as async Task

Source https://stackoverflow.com/questions/67918600

QUESTION

ListView Cell Binding not finding Methods in Collection

Asked 2021-Jun-10 at 02:17

I am trying to use MVVM and ListView for the first time. I am working from Xamarin.Forms multi column table GUI

My ViewModel looks like this

...

ANSWER

Answered 2021-Jun-10 at 01:38

In short, incorrect data type for your ListView items.

Define your model in an individual class
(No need to implement INotifyPropertyChanged for model classes but do that in BaseViewModel)

Source https://stackoverflow.com/questions/67913143

QUESTION

C# WPF INotifyPropertyChanged not updating form

Asked 2021-Jun-08 at 18:39

I am trying to implement a form with some calculations based on user inputs. Using the MVVM pattern, in particular INotifyPropertyChanged.

All works well when the user enters a value in a textbox, the calculation routine fires, and the form updates with the result.

However when the input is changed from codebehind, the Inotify routines fire, the calculation completes, but the bound controls don't update.

I have two problems:

Using pages within frames, I want to trigger a refresh when the page is changed
Import previously saved data that is in an Xml file. Again, the routine fires, but no update to the form's bound controls.

I have attached a condensed version of the code, but this isn't really the problem I don't think. Note I am using a singleton class.

Thanks

===============

...

ANSWER

Answered 2021-Jun-08 at 18:39

Note I am using a singleton class.

There are no errors in this code. But you may be using it incorrectly. To avoid accidental usage errors, I advise you to change the implementation:

Source https://stackoverflow.com/questions/67892059

QUESTION

DataGrid MultiSelect bound to ObservableCollection unstable when ObservableCollection is modified in the ViewModel

Asked 2021-Jun-08 at 16:03

I’m building a WPF C# application that has multiple DataGrids bound to their respective ObservableCollections that contain objects.

I will focus on the DataGrid that binds to the Conduits ObservableCollection to keep things simple.

The DataGrids are set to multi select SelectionMode="Extended". The data in the DataGrids is also represented in a 2D view via a Canvas and drawing elements.

The idea is the user can select the objects in 2D or the DataGrids, as a single item, or multiple items/rows, and the DataGrid row, or object in 2D will be highlighted.

This is producing some unstable results. Too many to list, so I will focus on deleting items. I can delete objects in the 2D without problem when the DataGrid ViewModels have not been initialized. Once they are initialized I get the following error when deleting in 2D.

...

ANSWER

Answered 2021-Jun-08 at 14:56

The exception message means that you cannot remove an item from an IEnumerable while enumerating it using a foreach loop.

The general solution is to replace the foreach loop with a for loop and iterate through the collection backwards:

Source https://stackoverflow.com/questions/67884952

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

Vulnerabilities

No vulnerabilities reported

Install PropertyChanged

Install the PropertyChanged.Fody NuGet package and update the Fody NuGet package:. The Install-Package Fody is required since NuGet always defaults to the oldest, and most buggy, version of any dependency.

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