aspnet/Blazor

Discussion on Blazor, a framework for building web apps with .NET and WebAssembly https://blazor.net

Jeremy Knaggs

@JeremyKnaggs

I think this is a different issue from @PatrizioR , does anyone know how to run a blazor maui app from the publish folder? I've tried double clicking the .exe and nothing happens. I can get the app to run from VS using the debug button or F5..

Alberto Passalacqua

@AlbertoPa

@chucker23n:matrix.org the messaging has been unclear to me. When they announced MAUI, Linux was out. However, later the message has been that Blazor apps will be able to run on Win/Mac/Lin, and the same is discussed in two issues (with Linux support now moved out of Net 6). The lack of support for Linux has been a headache, and really, even they have several apps that do not use their tech because they need to really be cross-platform, so credibility-wise, it does not look great.

2 replies

@makotech222 thanks, I'll take a look :-)

Simon Ziegler

@simonziegler:matrix.org

[m]

Hi All. I'm doing some source gen on a view model and at a certain point want to place all of an object's properties into an Excel file. This is going OK, however I've generated a List<string> to pass the values to a function that uses EPPlus to build the spreadsheet. The biggest issue is that dates get formatted as text and so don't benefit from the user's culture (they're always "mm/dd/yyyy"). This is clumsy. How do a build a List of primitives instead, so I can ensure correct cell by cell population?

Or should I alternatively build a list of Tuple<Type, object> from sourcegen?

Sören Nils Kuklau

@chucker23n:matrix.org

[m]

Does the type help you?

If not, just pass objects

Simon Ziegler

@simonziegler:matrix.org

[m]

I need to know the type in order to enter the data in the correct manner. Dates in particular need to be Excel-ized.

Sören Nils Kuklau

@chucker23n:matrix.org

[m]

You could make a generic method where you switch on the type. But while I haven’t tried EPPlus myself, it seems you’d just set the Value property either way

Simon Ziegler

@simonziegler:matrix.org

[m]

psyndar

@psyndar:nltrix.net

[m]

If you pass date as yyyy-mm-dd, doesnt excel convert to date?

Alberto Passalacqua

@AlbertoPa

Would code with Parallel.For run (even though not in parallel) in Blazor WASM? :-?

Ivan Josipovic

@IvanJosipovic

I think i read they fixed parallel for in wasm

dotnet/runtime#43411

Alberto Passalacqua

@AlbertoPa

whoever did that has all my love :-)

in 6... ok, so not yet

Alberto Passalacqua

@AlbertoPa

would come handy to reuse some math libs :)

Alberto Passalacqua

@AlbertoPa

actually, it works in 5 too

Sören Nils Kuklau

@chucker23n:matrix.org

[m]

Heh. They seem to be arguing over whether it’s fixed

Joe4evr

@Joe4evr

I love Jan's comment in that thread so much 🤣

You can always try/catch PNSE.

Sören Nils Kuklau

@chucker23n:matrix.org

[m]

Not technically wrong!

Peter Morris

@mrpmorris

@simonziegler:matrix.org You can durst cells in excel. If that works then it is recognising it as a date. In which case you need to find out how to format a column, not the values

Peter Morris

@mrpmorris

durst = format (silly phone)

SQL-MisterMagoo

@SQL-MisterMagoo

@AlbertoPa re: Parallel.For - if it's your code, then yes, as long as you configure it to never use more threads than are available - I have it in some code that I run in SSB and WASM, so in WASM it only uses the 1 thread available and is slower, but at least it does not break.

If it is a library that didn't think about limiting threads then not likely to work.

Igor Vuleta

@ItsIgzy_twitter

Hello folks, I have a tiny problem with the Navigation Manager. I am currently trying to show a dialog based on location change. That part works ok, except that, when I click the first component in the side menu, the navigation happens first, and then the dialog shows. When I do the same but click on the second component in the side menu I get the desired functionality, the dialog pops,and then based on the choice I navigate to another page, has someone had simmiliar problems like this?

Mario van Zeist

@MariovanZeist

@ItsIgzy_twitter The NavigationManager.LocationChanged event will always happen after the Location has been changed. Can you elaborate on what your desired functionality is? e.g. showing a dialog after navigation, or show a dialog before navigation, and redirect user to another page?

Joe4evr

@Joe4evr

Whoah! This is a PG rated repo.

🤣

Simon Ziegler

@simonziegler:matrix.org

[m]

All, I'm running my app on .net 6 preview 6. How do I revert back to preview 5?

1 reply

Igor Vuleta

@ItsIgzy_twitter

@ItsIgzy_twitter The NavigationManager.LocationChanged event will always happen after the Location has been changed. Can you elaborate on what your desired functionality is? e.g. showing a dialog after navigation, or show a dialog before navigation, and redirect user to another page?

I want to show a dialog when the user clicks on a navmenu item, displaying a warning, and informing the user that he is going to navigate to another page, and offer him options to stay on the current page or navigate to another page.

Example would be:"User is on a details page, he then clicks on navmenu home, before the navigation starts, a dialog should pop and tell the user that he is leaving the current site and will be navigated to home, or what ever page he choosed from the nav menu"

Simon Ziegler

@simonziegler:matrix.org

[m]

I want to change both. Changing the package refs is straightforward, how do I do the SDK?

1 reply

gismofx

@gismofx

Anyone else have an issue/annoyance with double quotes in the razor editor? For example inserting double quotes always inserts a set of 2.

Sören Nils Kuklau

@chucker23n:matrix.org

[m]

you need to wrap in ()

and also, the Razor editor is a mess :)

Igor Vuleta

@ItsIgzy_twitter

Anyone else have an issue/annoyance with double quotes in the razor editor? For example inserting double quotes always inserts a set of 2.

yes

Mario van Zeist

@MariovanZeist

@ItsIgzy_twitter As long as you don't want to abort that navigation it's ok, as there is currently no way to abort a Navigationevent in Blazor. But keep in mind that the LocationChanged event is called AFTER navigation has already occurred.

Igor Vuleta

@ItsIgzy_twitter

@ItsIgzy_twitter As long as you don't want to abort that navigation it's ok, as there is currently no way to abort a Navigationevent in Blazor. But keep in mind that the LocationChanged event is called AFTER navigation has already occurred.

which basically tells me that I don't have any more options :D thanks I saw your PR on github, and if I may ask is there a way through JSRuntime to achieve that?

Erwin Kuhn

@erwinkn

You can add a warning when a user attempts to close a tab or window in JS using onbeforeunload, but I don't think JS can intercept navigation done by Blazor

Otherwise the link itself could first display a warning and the navigation is triggered only when the warning is dismissed?

Mario van Zeist

@MariovanZeist

@ItsIgzy_twitter I am afraid you are a bit out of luck, As navigation can occur due to several avenues (Using back buttons, using javascript functions) or using the Blazor router, there is no one stop for aborting a navigation call

Igor Vuleta

@ItsIgzy_twitter

@erwinkn yes, but the navigator would navigate to the page disregarding the warning

@ItsIgzy_twitter I am afraid you are a bit out of luck, As navigation can occur due to several avenues (Using back buttons, using javascript functions) or using the Blazor router, there is no one stop for aborting a navigation call

and thanks, I will prolly have to find another UX friendly solution to this.

Erwin Kuhn

@erwinkn

I mean that you could convert the link with href="target" into onclick="@ShowWarning(target)". When the warning is dismissed, you can call the NavigationManager manually to send the user to the target

This doesn't handle back buttons though

Igor Vuleta

@ItsIgzy_twitter

I mean that you could convert the link with href="target" into onclick="@ShowWarning(target)". When the warning is dismissed, you can call the NavigationManager manually to send the user to the target

I'll check that option also, could be useful, thanks :)

Simon Ziegler

@simonziegler:matrix.org

[m]

Sören Nils Kuklau: thanks - global.json. Of course

Stefan Ossendorf

@StefanOssendorf

Does anyone know what's the correct hook to see whether I am authenticated or not? I'm using OIDC and when I e.g. change the language and the app is reloaded I am still authenticated but the AuthenticationStateChanged event isn't fired.

Somehow the most promising approach looks like implementing a custom AccountClaimsPrincipalFactory<RemoteUserAccount> and check if the created user is authenticated and do my stuff then. But that feels wrong...

Mladen Macanović

@stsrki

Hi everyone. I just wish to announce the release of Blazorise v0.9.4
Release notes @ https://blazorise.com/news/release-notes/094/

Stefan Ossendorf

@StefanOssendorf

Nice :-D

Simon Ziegler

@simonziegler:matrix.org

[m]

Well done Mladen

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