Binding to a PasswordBox (MVVM) - EASY WPF (.NET CORE)

Learn how to bind to a PasswordBox by creating a custom control. One of the most frustrating issues with the WPF PasswordBox is that the Password property is not a DependencyProperty. Therefore, view models can not bind to the Password property. However, this problem is solvable by creating a custom WPF control and setting up a custom Password DependencyProperty.
SOURCE CODE: github.com/SingletonSean/wpf-...

[@polarisnation201]

Your video is so nice with subtitle. Thanks to you, I saved time.

[@jonathancumini6183]

Best value for this topic. Thank you so much

[@lolol-kt6vp]

Thank you very much, simple elegant soltion!

Sean, thanks a lot. Great tutorial, very well explained and it was just what I needed. Excellent! Thanks again.

[@SingletonSean]

Thanks Marvin, glad this helped!

[@MXDMND_]

Thanks for this tutorial so much. It was very useful for me. I shold have deeper understanding of the dependency properties since as I can see there are a lot of possibilities in the depprops. Thanks again ;)

[@SingletonSean]

Hey Zsolt, glad the tutorial was helpful! This is definitely a good demonstration of the power of dependency properties.

[@tjzIsMe]

Thank you for this, password boxes are pain to deal with in WPF, leading a lot of newer developers to cheat a bit to make things easier, leading to weakened security.

[@SingletonSean]

Definitely Joe! Glad I'm not the only one who's experienced this. I'm also guilty of cheating around it in the past, hahaha.

[@mirko7389]

@@SingletonSean doesn't this solution weaken security also by exposing password ?

[@jacemalloy5160]

Simple and functional. Thanks man!

[@marioilsanker4307]

Excellent tutorial and a very nice solution! Thank you very much for sharing!

[@marioilsanker4307]

On a second thought though, maybe it would be a good point to have the _password backing field within the ViewModel to be a System.Security.SecureString to avoid having the password stored as plaintext in memory? I guess this is even the reason why PasswordBoxes do not offer a string Binding per default?

[@edgarsarkisyan6422]

Thanks a lot my brother, your tutotial helped me with this spooky PasswordBox binding. Big lOVE

[@SingletonSean]

Certainly spooky! Glad this was helpful Edgar

[@kennethgrande5749]

Great video Sean 👍

[@BrankoTheDefender]

Thank you. You are the best!

[@julianoleicam]

Thanks for this video, i'am implemented this to solved a issue task.

[@dino633]

Good video! Thanks a lot!

[@matk5087]

U saved me!!!! THX

[@SoloEnLaCasa]

Hi Sean Thank you very much for helping the community to understand more about WPF with MVVM. excellent video to understand Binding PasswordBox in WPF with MVVM could you extend the application, so that when the password is inserted, each inserted character is showed for a short time? or a button to show all characters the inserted password? take care and stay healthy

[@popadicm7021]

Thanks legend

[@toddnedd2138]

It is a solution, thanks for providing it. I prefer a solution using a behavior, it is almost the same code with a dp, but you can get rid of the combined control xaml and have only a clean cs file.

[@HaiAek]

Thank you

[@dannyklee1134]

Hi Sean Your example is great. But how can I completely select the content of the "GotFocus-Event"?

[@noahyannis2465]

So when I want to bind the content of a TextBox to a Property in the view model, I have to create a new, special TextBox control class?

[@brandonberisford]

Sean can you make this control for the .NET Framework as well?

[@longuinni]

Really nice tutorial!!! But seriously Microsoft, WHY??? A suggestion for the next WPF video: INotifyDataErrorInfo with complex object, not just a simple property.

[@SingletonSean]

Haha exactly Fernando! INotifyDataError is a great topic I'd like to cover. Thanks for the suggestion.

[@RealBadCharlie]

In MHO the DependencyProperty system is by far the most powerful feature of WPF.

[@SingletonSean]

Definitely Charlie! I love dependency properties and they open up so many opportunities for creating rich and reusable components. Sometimes I feel like they don't get as much love/respect since there's so much boilerplate code associated with adding one. Of course, snippets take care of this problem. It would be nice to have it as simple as "props" in JS frameworks like React or Vue. Maybe I'll work on some kind of package to accomplish that functionality, haha.

[@shakrazj]

hello friend. I get a XDG0062 error: Default value type does not match type of property 'Password'.. I can't see how it wouldn't. Anything come to mind that could be the cause of this?

[@hohojimmy4443]

Useful！

[@SingletonSean]

Good to know, thanks hoho!

[@fsl1209]

I cant get my bindablepasswordbox to be supported in the xaml of my loginview, no matter how i use namespaces?

[@SuperArbalest]

Thanks for your tutorial! Sean, May you make a series about Reactive Extension Package,please? Thank you!

[@SingletonSean]

Hey SuperArbalest, I'd love to do videos on this! I've only used reactive extensions once or twice, so I'm not super experienced with them. From reading the documentation in the past, I can tell they are extremely useful! Looking forward to add this to my tookit.

[@davidos533]

Awesome

[@user-gt2wc2eg1i]

Спасибо!

[@jozefvendel1831]

If I enter the wrong password, how is it possible to delete the Passwordbox in the UI? is it necessary to reload LoginView?

[@richardhrban8707]

Sean, when I try to set Template property in Style, I cant type in nothing, when I switch to standard passwordBox, with exactly same style, it is working fine.

[@richardhrban8707]

I tried to use your NuGet PasswordBox, so it is valid for that, also I cant bind IsFocused for default text, so I ends up with create my own UserControl where I need to handle also focus.

[@VinuP2023]

Thank much Sean :) Sean, I have one question. Canyou please explain what is callback and why we need it,how we achieve it using delegates. I watcher many tutorials and I don't seem to get it :)

[@SingletonSean]

Hey Vinay, callbacks are important for handling events. Using events is useful for decoupling code and communicating between different objects. The best way to learn is by playing around with them in your own environment :) I will admit when I started programming and first learned about events, it was definitely a weird topic to wrap my head around at first. As always, with enough practice it will eventually click!

[@avatar-kf1ii]

That's nice. I cheat by setting a value on view model from the view's code behind. Like: ((dynamic)DataContext).Pass = (sender as PasswordBox).Password;

[@SingletonSean]

Thanks avatar! Haha, everyone has a different hack to get around this issue. That's pretty hardcore, lol.

[@riyadamrani]

I Sean wouldn't that be a security concern to keep the password non encrypted on the memory like this ? MessageBox was propably made so you pass that PasswordBox.Password straight to the encryption command.

[@SingletonSean]

Hey Riyad, I'm not sure it's too dangerous. Considering I can retrieve the PasswordBox.Password in my application in plain text, I would assume a hacker could too. Additionally, if a hacker has trespassed into the user's PC memory, then the hacker is probably also capable of logging the user's keystrokes and obtaining the password in that manner too (or just opening the users "password.txt" file on their desktop, right? Hahaha). Definitely a great question and a valid concern to have though!

[@riyadamrani]

@@SingletonSean Thank you for the response! I am also addicted to the full stack MVVM serie so I am looking forward for the next episode 😂

[@solver9113]

Hello, billions thanks to your tutorial, can you pls tell me how to set "CaretBrush" property for this BindablePasswordBox?

[@solver9113]

Thanks, I dealed with it

[@user-gt2wc2eg1i]

Кстати некорректно работает если во Frame открывать страницу повторно, то затирается приватная переменная пароля. Почему? Как исправить? Пришлось каждый раз создавать страницу чтобы показать ее во Frame

[@bulsond]

Страницами и фреймом лучше вообще не пользоваться. Вместо страниц надо использовать UserControl, а для отображения в окне использовать

[@gregorjrgensen1466]

For some reason Password in my viewmodel is getting nullified when I activate the command - public ICommand LoginCommand { get { return new BaseCommand(ClickLogin); } } private async void ClickLogin() { IsEnabled = false; UserName = _username; Password = _password; // change this to incorporate hash and verify ShowMessageBox(Password); BaseCommand: internal class BaseCommand : ICommand { private readonly Action command; private readonly Func canExecute; public BaseCommand(Action command, Func canExecute = null) { this.canExecute = canExecute; this.command = command ?? throw new ArgumentNullException("command"); } public void Execute(object parameter) { command(); } public bool CanExecute(object parameter) { if (canExecute == null) return true; return canExecute(); } public event EventHandler CanExecuteChanged; } any idea what's happening there?

[@VinuP2023]

Hello Sean, a request video please: use of partial class in a real time scenario. I know partial classes are there in code behind of Win forms and WPF XAML, but do we ever need to create a partial class for some use case.

[@SingletonSean]

Hey Vinay, I personally don't like to create partial classes. I've had weird scenarios in the past where I've wondered "where is this function/variable?" only to realize I was in a partial class and the function/variable was in another partial class. However, if you want to split up a class across multiple files, partial classes are a good solution. Just don't make your entire application one gigantic partial class hahaha.

[@VinuP2023]

Sean, thank you for the suggestion ☺️

[@HackelSchorsch]

It is so unbelivable that this is still an issue and there is still no offical solution for this.

[@SingletonSean]

Seriously, it is fixed in .NET MAUI though!

[@ivandrofly]

Another issue with password box can be learn in kzbin.info/www/bejne/qqO1ZoWHfKqnm68

[@neriacohen5490]

the version of 2022 SUCKS! Do not! download!!!!!!!!!! only 2021 and below.