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From what I can tell you need to viewmodel in order to perform two tasks.
Complicated binds
Binds involving transforming data.
Both cannot be done at least in part due to the fundamental syntax limitations of declarative binding, to wit: How do you actually describe a data transformation in a string literal?
(by that i mean, a transformative binding here: )
<controls:RatingControl NumberOfStars="{Binding NumberOfStars}"
Value="{Binding RatingValue}" />
Therein lies a big part of the problem. What is one to do? I suppose you could expose your data models as XML and describe the binds using XSLT transforms but I can think of things I'd rather do, like stab my own eyes out.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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You can use the Behavior class to mess around with that. Effective but I wont say pretty; it's an attached property
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I recently saw a gif "explaining" (more like a moving diagram) MVVM and something like twelve(!) alternatives like MVC and MVP 
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Alternatives like MVC ... it depends on which rubber ruler you use, but is kind of apples and oranges because the way they solve the separation issue is so much different.
Personally I think such a gif only confuses the issue. Not all diagrams are helpful.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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honey the codewitch wrote: Personally I think such a gif only confuses the issue.
It did 
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On top of that, the MS bindings have bugs on the edge conditions. My hand rolled bindings don't.
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Silly me for assuming they would have fixed those by now. 
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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The part MVVM misses is that UWP and WPF have powerful "binding" engines; and that properties can be "functions". A POCO can be "smart", in the sense that while it has no "methods", it can contain functional programming (expanded "getters" if you will). There are no "fixed" layers as the MVVM model tries to paint.
"Before entering on an understanding, I have meditated for a long time, and have foreseen what might happen. It is not genius which reveals to me suddenly, secretly, what I have to say or to do in a circumstance unexpected by other people; it is reflection, it is meditation." - Napoleon I
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I just love it when Visual Studio displays and error that neither Microsoft nor google search returns a match for.
I'm creating an Azure function app in VS 2022 with the target framework set to .NET8.0. Building the code returns only one error: "TargetFramework is invalid. Change the TargetFramework to net5.0 or net6.0"
So VS 2022 which allows me to select net8.0 doesn't really support net8.0? (sigh)
There are no solutions, only trade-offs. - Thomas Sowell
A day can really slip by when you're deliberately avoiding what you're supposed to do.
- Calvin (Bill Watterson, Calvin & Hobbes)
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Yes, we are using the isolated-worker model and I thought we had everything we need, but that gives me something to check. Thank you!
There are no solutions, only trade-offs. - Thomas Sowell
A day can really slip by when you're deliberately avoiding what you're supposed to do.
- Calvin (Bill Watterson, Calvin & Hobbes)
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of course, developers would have to debug it. Hey, I have an idea. Maybe Microsoft should follow a basic UI principle. If it won't work or is not supported, don't let the user select it. The alternative might be to point out the issue with more details. But nah, I don't expect that of Microsoft.
Jeesh.
fwiw, this crap seems to be culturally embedded within Microsoft. COM, COM+, DCOM, ActiveX (another variant of COM), etc. They never learn; however, they can embed advertisements in my toolbar. 
Charlie Gilley
“They who can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety.” BF, 1759
Has never been more appropriate.
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Same for C++ apparently, my colleague complained that .NET 8 could not be selected yet, so now our solution with C# and C++ projects has an ugly mix of windows8-net8 and windows8-net7 paths.
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The first versions of 2022 didn't support net8, but I assume your colleague has a version that does. Unlike your colleague I can select net8, everything in the solution is net8.
TGIF
There are no solutions, only trade-offs. - Thomas Sowell
A day can really slip by when you're deliberately avoiding what you're supposed to do.
- Calvin (Bill Watterson, Calvin & Hobbes)
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I'm sure he has the newest version of VS, he's always (too) keen to update to a new version. I don't know where exactly the problem lies, but I suspect it's in one or more of the 3rd party libraries he uses for video.
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Hmm, try deleting the bin and obj folders, then rebuilding. Fixes a lot of 'incompatibility' issues that occur when switching frameworks.
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Thanks, unfortunately that didn't work this time.
Clicking into the error brings up a window that looks like a build configuration file for Microsoft.Azure.Functions.Worker.Sdk.targets and points me to this line inside a <Target Name="_FunctionsPreBuild" BeforeTargets="Build"> block:
<Error Condition="'$(TargetFrameworkIdentifier)' != '.NETCoreApp' Or ('$(TargetFrameworkVersion)' != 'v6.0' And '$(TargetFrameworkVersion)' != 'v5.0')" Text="TargetFramework is invalid. Change the TargetFramework to net5.0 or net6.0" />I can find no direct reference to this configuration, where it comes from or how to change it. Things like this shouldn't be hard. 
There are no solutions, only trade-offs. - Thomas Sowell
A day can really slip by when you're deliberately avoiding what you're supposed to do.
- Calvin (Bill Watterson, Calvin & Hobbes)
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Edit: I accepted solution 5 just because it was the most detailed. Thank you all who answered and gave me some ideas for moving forward.
I didn't want to get hassled for posting this question in the lounge:
Winforms is dying and using XAML and the designers for it is like pulling teeth. What now?[^]
So I made a programming question.
They told me I should have put it in the lounge.
New Rule Proposal: Recognize that you, as an average commenter, have no better grasp on where to post things than anyone else, and just accept where the questions lie if there is any room for interpretation. Is that too difficult? Really? It is? Do I need to hand out hobbies? 
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
modified 8-Feb-24 15:09pm.
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To answer your question, if I were still using XAML, I would use Blend with it. It takes a little bit of getting used to, but it's far superior to working with the layout designers in VS.
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Thanks! That's that "Blend for Visual Studio" I've heard referenced in the docs eh?
Is it already installed with visual studio?
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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That's the one, and it is installed with VS.
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Pete O'Hanlon wrote: if I were still using XAML, I would use Blend with it.
Okay wait, you've intrigued me.
What are you doing *now?* for UI stuff?
I am not invested in UWP or any of that. I'd be fine with MAUI or whatever.
As long as it's modern. Cross platform a huge bonus. Particularly if it will run on phones and use C#.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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So, when I do have to write a pure desktop app, I use AvaloniaUI. It's waaay better than Maui. Most of the time, now, I'm using Blazor. The ability to run both in the browser, and as a PWA for those who want to run it on the desktop.
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It didn't occur to me to use Blazor on the desktop. I've heard of AvaloniaUI before, but only just. I'll give it a look.
Not sure Blazor fits the bill for me, as most of my applications are either utilities, or small companion apps for IoT devices, so there are some considerations. Like for example, In EspMon I had to embed a manifest to make it require elevated privileges on launch so i could collect hardware statistics from the PC. Blazor *might* not be appropriate for such a situation.
I'm thinking you answered with a combination of things for a reason, so I'll give each of these things a look.
You just threw me a lifeline. I was so at a loss as to where to move on this, and the longer I waited to move away from .NET Framework, the more behind I was going to be by the time I finally took the plunge.
You've been a great help. Thank you again.
Check out my IoT graphics library here:
https://honeythecodewitch.com/gfx
And my IoT UI/User Experience library here:
https://honeythecodewitch.com/uix
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I absolutely agree with you: I first discovered this when I considered moving from WinForms to WPF - but the designer tools in VS were so piss-poor that I just gave up and stuck to WinForms.
Hand coding XAML after the drag'n'drop excellence I was used to? Why? It just made WPF feel "unfinished" and turned me right off the whole idea. It's the 21st Century: we shouldn't have to put up with crap like that.*
* Reposted here so I can get ranted at in two places as well ...
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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