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- Creates option element .
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QUESTION
This question is about two MAUI controls (Switch
and ListView
) - I'm asking about them both in the same question as I'm expecting the root cause of the problem to be the same for both controls. It's entirely possible that they're different problems that just share some common symptoms though. (CollectionView
has similar issues, but other confounding factors that make it trickier to demonstrate.)
I'm using 2-way data binding in my MAUI app: changes to the data can either come directly from the user, or from a background polling task that checks whether the canonical data has been changed elsewhere. The problem I'm facing is that changes to the view model are not visually propagated to the Switch.IsToggled
and ListView.SelectedItem
properties, even though the controls do raise events showing that they've "noticed" the property changes. Other controls (e.g. Label
and Checkbox
) are visually updated, indicating that the view model notification is working fine and the UI itself is generally healthy.
Build environment: Visual Studio 2022 17.2.0 preview 2.1
App environment: Android, either emulator "Pixel 5 - API 30" or a real Pixel 6
The sample code is all below, but the fundamental question is whether this a bug somewhere in my code (do I need to "tell" the controls to update themselves for some reason?) or possibly a bug in MAUI (in which case I should presumably report it)?
Sample codeThe sample code below can be added directly a "File new project" MAUI app (with a name of "MauiPlayground" to use the same namespaces), or it's all available from my demo code repo. Each example is independent of the other - you can try just one. (Then update App.cs
to set MainPage
to the right example.)
Both examples have a very simple situation: a control with two-way binding to a view-model, and a button that updates the view-model property (to simulate "the data has been modified elsewhere" in the real app). In both cases, the control remains unchanged visually.
Note that I've specified {Binding ..., Mode=TwoWay}
in both cases, even though that's the default for those properties, just to be super-clear that that isn't the problem.
The ViewModelBase
code is shared by both examples, and is simply a convenient way of raising INotifyPropertyChanged.PropertyChanged
without any extra dependencies:
ViewModelBase.cs:
...ANSWER
Answered 2022-Apr-09 at 18:07These both may be bugs with the currently released version of MAUI.
This bug was recently posted and there is already a fix for the Switch to address this issue.
QUESTION
I am getting an error in Android Studio to do with my Cursor.
I have the following line in my code
...ANSWER
Answered 2021-Nov-14 at 15:06I had an error like this.
My solution : change method getColumnIndex
into getColumnIndexOrThrow
.
QUESTION
I have been using github actions for quite sometime but today my deployments started failing. Below is the error from github action logs
...ANSWER
Answered 2022-Mar-16 at 07:01First, this error message is indeed expected on Jan. 11th, 2022.
See "Improving Git protocol security on GitHub".
January 11, 2022 Final brownout.
This is the full brownout period where we’ll temporarily stop accepting the deprecated key and signature types, ciphers, and MACs, and the unencrypted Git protocol.
This will help clients discover any lingering use of older keys or old URLs.
Second, check your package.json
dependencies for any git://
URL, as in this example, fixed in this PR.
As noted by Jörg W Mittag:
For GitHub Actions:There was a 4-month warning.
The entire Internet has been moving away from unauthenticated, unencrypted protocols for a decade, it's not like this is a huge surprise.Personally, I consider it less an "issue" and more "detecting unmaintained dependencies".
Plus, this is still only the brownout period, so the protocol will only be disabled for a short period of time, allowing developers to discover the problem.
The permanent shutdown is not until March 15th.
As in actions/checkout issue 14, you can add as a first step:
QUESTION
I just updated my Android studio to the version 2021.1.1 Canary 12. After struggling to make it work, I had to also upgrade my Gradle and Gradle plugin to 7.0.2. Now I can compile my project and launch my app on my mobile, everything is working. But when I try to generate a Signed APK, I get a strange message after building telling me: APK(s) generated successfully for module 'android-mobile-app-XXXX.app' with 0 build variants:
Even though the build seem to be successful I cannot find the generated APK anywhere (and considering the time it takes to give me that error, I don't even think it is building anything). Now, I have been generating an APK every week for years now, so I know my way around the folders, the different build variant output folders etc... Nothing changed in my way of generating an APK. I do it via AS and follow the very standard procedure.
Can someone point to me what am I missing here? I assume there is a way to select a specific build variant when generating a signed APK, how does it works?
PS: Obviously, I am selecting my variant here during the process:
PS2: I can generate a debug APK without any issue whatsoever.
...ANSWER
Answered 2021-Oct-05 at 07:39After a few days of struggle, I ended up switching to Bundle. It achieves the same purpose for me and it actually works so... That's my solution here.
QUESTION
I need to access the first element of a list
. The problem is that the lists vary in the way how deep they are nested. Here is an example:
ANSWER
Answered 2022-Feb-02 at 14:38You can use rrapply::rrapply
:
QUESTION
ANSWER
Answered 2021-Aug-09 at 11:03I have fund out that it is a bug. Many people are facing the problem using version 2020.3.1. Version 4.2.2 is working well in this case. Here are some links about this bug: https://issuetracker.google.com/issues/195340090 https://issuetracker.google.com/issues/191209456 https://issuetracker.google.com/issues/195318441 https://issuetracker.google.com/issues/195336461
QUESTION
Since updating to Visual Studio 2019 version 16.11.0 (today), compilation of Razor MVC views is failing on multiple cshtml
files in multiple projects:
error CS1576: The line number specified for #line directive is missing or invalid
I've tried to set fixed version of .NET Core SDK in global.json
file, which was placed in a root folder of MVC Web project, as described here, but that did not help as well.
ANSWER
Answered 2021-Aug-15 at 13:53I'm having the same problem. I thought it was because I had recently updated .Net 6
to Prerelease 7
but looks like there is a serious bug somewhere in the 16.11
release.
QUESTION
I have installed .NET 6.0 SDK and Visual Studio 2022. However, Visual Studio 2022 does not offer the ability to select .NET 6.0.
I know I can edit the project file with the target framework so please don't suggest that. This question is specifically around the Visual Studio 2022 UI.
Edit 1:
.NET 6.0 Runtime has been selected in the Visual Studio Installer for Visual Studio 2022
Edit 2:
I can create .NET 6.0 projects but cannot seem to target .NET 6.0 in existing projects which were previously .NET 5.0.
...ANSWER
Answered 2021-Nov-11 at 12:15During Visual Studio setup, you need to select the ".NET 6.0 Runtime". As can be seen in the screenshot, this option not only includes the runtime itself but also "templates for developing [...] .NET 6.0 applications".
You can modify your installation by starting "Apps & Features" from the Windows start menu or by selecting Tools/"Get Tools and Features..." from the Visual Studio menu bar.
QUESTION
Discussion about this was started under this answer for quite simple question.
ProblemThis simple code has unexpected overload resolution of constructor for std::basic_string
:
ANSWER
Answered 2022-Jan-05 at 12:05Maybe I'm wrong, but it seems that last part:
QUESTION
I'm having trouble understanding how/why parentheses work where they otherwise should not work®.
...ANSWER
Answered 2022-Jan-09 at 16:14Note: When referring to documentation and source code, I provide links to an unofficial GitHub mirror of R's official Subversion repository. The links are bound to commit 97b6424 in the GitHub repo, which maps to revision 81461
in the Subversion repo (the latest at the time of this edit).
substitute
is a "special" whose arguments are not evaluated (doc).
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