Comments by Graeme_Grant

Graeme_Grant 7-Aug-24 5:46am View

I want to win lotto...

Never say "I want" ... you wont get answers when demanding. Also, this is a code dump, so can be considered spam.

Please read the instructions before posting. Here they are:

A few simple rules when posting your question.
1. Be courteous. Everyone here helps because they enjoy helping, not because it's their job.
2. Have you searched or Googled for a solution?
3. Be specific! eg "How do I change the dialog colour?" instead of "My code doesn't work. Help?"
4. Tag your question appropriately.
5. If you have a school or university assignment, assume that your teacher or lecturer is also reading these forums.

Do not remove or empty a message if others have replied.

Your question may be edited or retagged by others. Anything inappropriate will be removed.

Hit that "Improve question" link and update your question please.

Graeme_Grant 3-Aug-24 10:02am View

We can't see you code unless you post it here. Create a simple page and css to demonstrate the issue. Then use the Improve question link to update the question.

Graeme_Grant 11-Jul-24 17:27pm View

[moved]

Graeme_Grant 9-Jul-24 15:45pm View

No one here is going to convert WPF code, that you claim is your own, to a Blazor app for you. You need to do that yourself.

Graeme_Grant 31-May-24 6:38am View

https://www.codeproject.com/KB/Articles/1215232/WpfToggleSwitch.zip[^]

Graeme_Grant 29-May-24 17:16pm View

My code in the article is not broken. Download and run it. Set breakpoints and learn hw it works!

Graeme_Grant 27-May-24 8:37am View

If he just put the same amount of effort into learning as he does to asking constantly for help, he will discover that his question was already answered in my article.

Graeme_Grant 25-May-24 22:38pm View

We have answered this multiple times in the past. You need to put some effort in.

All that you need is in the article linked above. Download the code, run it, set breakpoints, and learn how it works.

Graeme_Grant 25-May-24 18:47pm View

Do you think that he still needs help after 12 years? 🤔

Graeme_Grant 25-May-24 18:45pm View

PropertyChanged event is not raised in the Property Setter.

Graeme_Grant 22-May-24 5:38am View

Take a look at his QA history. Bit of a help vampire.

Graeme_Grant 21-May-24 6:20am View

A background service can do what you want, you simply have to code it. You have a central ticker and that executes the jobs based on your custom job scheduler. What that is is up to you to create.

If that is too much, then look at third-party like libs. Watch this: The Easiest Scheduling for Your .NET Applications - YouTube[^]

Graeme_Grant 10-May-24 5:02am View

Set a breakpoint here to check what is returned:

var result = signinManager. ...

Graeme_Grant 30-Apr-24 17:09pm View

Deleted

Here is a great video on TAP: Writing async/await from scratch in C# with Stephen Toub - YouTube[^]

Graeme_Grant 30-Apr-24 16:21pm View

"Well, when I was at Microsoft we weren't using TAP yet... They embrace and abandon coding patterns as they need to ..."

F# added asynchronous workflows with await points in version 2.0 in 2007 (5 years before C#). Microsoft first released a version of C# with async/await in the Async CTP (2011) in .Net Framework. It was later officially released in C# 5 (2012).

Not just a fad or latest trend...

Graeme_Grant 30-Apr-24 15:09pm View

I've done a lot of both, so I do talk from experience. You can write multi-threaded code like procedural code using TAP, Threads you can't. Your example above is a simple one, no different to Task.Run.

Look at the .Net Core source code. Look at the Microsoft documentation. They write all of the framework using TAP. Their docs also use TAP. When you create an app using the Microsoft templates, they use TAP. Show me the extensive use of Threads in the docs other than the Thread documentation itself. Show me a template from Microsoft that uses Threads. There is a reason that you can't.

Graeme_Grant 30-Apr-24 9:18am View

Threads are not simple beyond the example given. TAP removes most of the complexity. You can still get TAP wrong if you do not understand it.

Graeme_Grant 30-Apr-24 8:02am View

TAP[^] is the more modern way of doing the same thing.

Graeme_Grant 30-Apr-24 7:54am View

A virtual +5

Graeme_Grant 28-Apr-24 7:53am View

You have posted the same question twice. Please remove one.

Graeme_Grant 27-Apr-24 16:38pm View

See my updated answer.

Graeme_Grant 24-Apr-24 20:24pm View

Yes. Look at part two of my reply - there is your issue.

Graeme_Grant 24-Apr-24 16:24pm View

Are you sure that is the correct exception message? That would indicate that the request failed due to an underlying issue such as network connectivity, DNS failure, server certificate validation or timeout.

Graeme_Grant 24-Apr-24 4:52am View

All good. I would have gone into more details however was on the way out the door to take the wife & kids camping...

Graeme_Grant 24-Apr-24 4:51am View

You have caught the error. Set a breakpoint where you return the error and inspect the rest of the error, not just the message.

Graeme_Grant 20-Apr-24 18:45pm View

There is more to that error message than what is indicated. Look at the raw response. Also, you need to check how you have configured your account on Microsoft's side as it will prevent you from authenticating if not configured correctly.

Graeme_Grant 20-Apr-24 9:54am View

Fails? Fails how? What happens versus what is expected? By looking at the answers to these questions lies the answer. Understanding why it fails is how you work a solution. Please update your question with more details.

Graeme_Grant 20-Apr-24 8:05am View

What error? Did you open the browser web tools > console window, reload the page and inspect the error message? What was the exact error? Hit the Improve link above and post the complete error message.

Graeme_Grant 14-Apr-24 9:01am View

What framework? Winform? Wpf? MAUI? etc...

Graeme_Grant 10-Apr-24 5:05am View

Hope it helps

Graeme_Grant 3-Apr-24 6:54am View

Hmmm... not lot to go on...

Have you used your browser web tools to check if the element is in the DOM? It could be a CSS issue.

Also, have you set a breakpoint inside your script and step through to see what your code is doing?

Graeme_Grant 3-Apr-24 6:37am View

You may want to check out Pete's book: Advanced TypeScript Programming Projects[^]

Graeme_Grant 3-Apr-24 6:35am View

Beat me to it ... thanks.

Graeme_Grant 2-Apr-24 17:22pm View

LOL... been a few years since I've done any VB6. The way back machine comes in handy: Microsoft Visual Basic 6.0 Professional Edition (January 2001)(203 01158)(X06 15978) : Free Download, Borrow, and Streaming : Internet Archive[^]

Graeme_Grant 1-Apr-24 18:47pm View

How can you have no code when you claim that you are seeing an error? That makes no sense at all!

Graeme_Grant 1-Apr-24 9:51am View

If you were working with WPF, I have a sample of how to lazy-load branches on demand (when expanded). Look at the Google Drive - File Explorer example: Working with Newtonsoft.Json in C# & VB[^] (sample code in both C# & VB).

This is working with JSON data, however, the same principle applies.

Graeme_Grant 1-Apr-24 7:45am View

Wow, a blast from the past. VB6 was released back in 1998, 25+ years ago! Time to upgrade I think.

Graeme_Grant 1-Apr-24 6:26am View

If you want someone to write code for you, then there are these services:
* fiverr[^]
* Upwork[^]
* Freelancer[^]
* Guru[^]
* PeoplePerHour[^]
* TaskRabbit[^]
* Karat[^]

Graeme_Grant 1-Apr-24 0:09am View

No code is posted and we can't see your screen from here. All that we can do is guess what is happening. If you want more help, you need to post code to reproduce the problem.

Graeme_Grant 31-Mar-24 22:24pm View

All good. Glad to hear that you resolved it. My solution should hopefully help others too. :)

Graeme_Grant 30-Mar-24 9:18am View

Again, there are multiple ways to solve your issue. Slow down, read carefully, and work on the problem. It is a simple fix.

Graeme_Grant 30-Mar-24 8:52am View

Thanks ... Sometimes rubber ducking[^] helps! 😉

Graeme_Grant 30-Mar-24 8:39am View

the answer is there. One of your files is in the incorrect format or corrupted.

Graeme_Grant 30-Mar-24 6:51am View

Yes, as per the posted quoted text above from the link provided.

Graeme_Grant 27-Mar-24 5:05am View

hmmm... Sounds like homework...

Graeme_Grant 25-Mar-24 19:21pm View

Glad that it helps.

Regarding out-of-memory, do loading on demand with the TreeView control:
1. Load the root + 1
2. in the +1, only add a stub for each sub folder if it has 1 or more sub directories, no stub fi no sub directories.
3. on expand, remove the stub and repeat - load that path, then + 1 for each sub folder with a stub.

This is called virualization and will instantly load like the OpenFileDialog control. 😊

Graeme_Grant 25-Mar-24 9:01am View

As asked above, please post sample data. Use the "Improve question" link provided above.

Graeme_Grant 25-Mar-24 5:34am View

post some sample data that needs to be sorted

Graeme_Grant 25-Mar-24 5:22am View

Glad I could help! 😊

Graeme_Grant 24-Mar-24 21:35pm View

Where is the error being thrown? Which line of code? Make sure that you "break on all errors" = Debug > Windows > Exception Settings > Common Language Runtime Exceptions = ticked (default is indeterminate). Use the "Improve question" link provided above to post additional information requested.

Also, not all code paths return a list. You should return an empty list before End Function otherwise the return value can be null.

Graeme_Grant 23-Mar-24 20:13pm View

What does the browser Dev Tools console say?

Graeme_Grant 21-Mar-24 22:34pm View

Why are you using a discontinued version of Bootstrap? Bootstrap 3 is 10 years old in August this year!!!

Bootstrap version 5.3[^] is the current version.

Graeme_Grant 21-Mar-24 2:53am View

Both event types for the ObservableCollection (INotifyPropertyChanged.PropertyChanged & INotifyCollectionChanged.CollectionChanged events) and the INotifyPropertyChanged.PropertyChanged event for each item class. You can learn more about it here: Data binding overview - WPF .NET | Microsoft Learn[^]

Graeme_Grant 21-Mar-24 2:03am View

This should be posted as an article or tip[^], not an solution to a 5 year old question where the answer was already accepted. It will get lost here!

Graeme_Grant 20-Mar-24 18:11pm View

I have already suggested a job I'd for the link Uri sent in the email. So your suggestion is already covered.

Graeme_Grant 20-Mar-24 18:10pm View

In my suggestion I have a response type, so if set, then you would not accept a second response. So your suggestion is already covered.

Graeme_Grant 20-Mar-24 1:59am View

Ok.. We're not here to do your work for you, we are here to offer advice to help you with your code.

However, if you want someone to write code for you, then there are these services:
* fiverr[^]
* Upwork[^]
* Freelancer[^]
* Guru[^]
* PeoplePerHour[^]
* TaskRabbit[^]
* Karat[^]

Graeme_Grant 20-Mar-24 1:49am View

Are you asking us to design your database table for you?

Graeme_Grant 19-Mar-24 11:43am View

Both matter.

Graeme_Grant 18-Mar-24 20:37pm View

100% ... +5

Graeme_Grant 18-Mar-24 4:25am View

You have asked this as a second question.

Graeme_Grant 17-Mar-24 19:28pm View

If it has helped, please mark as answered.

Graeme_Grant 17-Mar-24 8:41am View

All parts of the solution were in the links provided. I used those links to create a sample for you. I don't use your data, so you'll need to adapt what I wrote for your own usage.

Graeme_Grant 17-Mar-24 6:40am View

please respond in the other thread as this conversation is not related to Gerry's solution.

Graeme_Grant 17-Mar-24 6:32am View

I replied to your post in our thread.

Graeme_Grant 17-Mar-24 6:31am View

This code is incomplete. You have not configured the CollectionViewSource for grouping. Go back to the links provided, the samples are very easy to follow.

Graeme_Grant 17-Mar-24 4:20am View

He has a WPF app, so needs a WPF solution. A CollectionViewSource will do what he wants. Check his Question history 😉

Graeme_Grant 14-Mar-24 21:06pm View

Please watch your tone. You asked for help. I have pointed out a key issue. You have chosen not to take the advise, that is your choice.

Graeme_Grant 14-Mar-24 4:13am View

This looks like a very "old school" hack. What is your question?

Graeme_Grant 13-Mar-24 21:13pm View

You totally missed the point. Your selected tags is not correctly bound in your model. But that is your choice to do so.

Graeme_Grant 13-Mar-24 9:31am View

Have you tried??? If you read the code samples in the links above, you will have your answer.

Graeme_Grant 13-Mar-24 6:00am View

As I stated in my last reply: "The CollectionViewSource is a custom view of the collection (listORG ). You can have as many as you want."

Spend time with the samples in the link to understand how they work.

Graeme_Grant 13-Mar-24 4:31am View

The CollectionViewSource is a custom view of the collection. You can have as many as you want.

1. Use the Count for the quantity, like you would with any other collection.
2. The links provide examples of how to use them. If I provided the code, it would be the same as in the examples in the links.

Graeme_Grant 12-Mar-24 20:36pm View

I've downloaded your repo and had a look at your project. Let me show you the issue that I highlight...

You have 2 x TagSelect custom controls outside of your DataGrid. You bind the SelectedTags property for each to a List<Tag> collection. The property that exposes these fires a RaisePropertyChanged event if a new collection is assigned. However, when you make selections in your popup, how do you respond to changes to the selected list collection? a List<> has no events for changes... So, if your control is used outside of your DataGrid, you have no way of handling any changes to the selected list.

The reason why it appears to work is due to the internal use of the ObservableCollection within the custom control.

Tis issue is also in your DataGrid. It is easy to demonstrate. Bind the custom control to a collection in your model (which you have done), and bind that property to another column in your DataGrid you will not see any changes. The easiest way to see this is to add the following column to your DataGrid:

<DataGridTextColumn Binding="{Binding Tags.Count}"></DataGridTextColumn>

When you make changes to your TagSelect the count does not change.

If you want to see a list of your tags in another column, look at how I use a converter to do it.

So, please, take another look at what I posted. It is a simple fix.

Graeme_Grant 12-Mar-24 19:23pm View

If it is of interest, I have written an article, here on CodeProject, on custom controls, where I use a slightly different approach that supports data binding of properties (not collections): Flexible WPF ToggleSwitch Lookless Control in C# & VB[^]

Graeme_Grant 12-Mar-24 19:02pm View

"I AM using an ObservableCollection<> for the presentation and updating of the interface."
With respect, the code posted in the question does not use it, hence my post. I cannot see your screen and codebase, so I can only base my response on what you share and my extensive experience with WPF.

Your solution is still binding to a List<> and will not see any changes to it's contents as the List<> does not implement the INotifyCollectionChanged Interface (System.Collections.Specialized) | Microsoft Learn[^] that is required for Data Binding.

Whilst it may appear that you have solved your problem, you still have this outstanding issue to address.

Graeme_Grant 12-Mar-24 7:58am View

Thank you! :)

Graeme_Grant 12-Mar-24 7:17am View

It can be done. See my answer below. ;)

Graeme_Grant 9-Mar-24 23:22pm View

Any reason why you are answering an 8 year old question? Please stick to current question where help is needed.

Graeme_Grant 8-Mar-24 18:27pm View

This is an 8 year old question. Please focus on current questions only.

Graeme_Grant 7-Mar-24 16:35pm View

In your DataEntry class, the binding is only triggered when the list is assigned to the property, not when the collection changes. So whilst it appears that it works, any changes to the list will not cause the DataGrid to refresh the cell as no notification in the binding system is received. The sample that I have given you fixes this issue. It also shows how to solve your key issue with binding to a collection, the Tags property in your DataEntry class.

It will only take a couple of minutes to create a sample project, then copy & paste the code, then run. I strongly recommend that you run the code above, then ask your questions if you are struggling.

Graeme_Grant 6-Mar-24 18:06pm View

This is a repost of the question asked here: Wpf customcontrol binding to a collection not working[^].

Please do not repost, update your original question (not a solution), by using the "improve question" link provided, and delete this post.

Graeme_Grant 5-Mar-24 18:40pm View

The answer is it depends. It depends on the type of application, size, etc. For a small application, it does not matter.

Graeme_Grant 1-Mar-24 5:56am View

It sounds like you have hooked the form closing event and trying to process the DataGridView cells. you need to set a breakpoint in that code or break on all errors.

Graeme_Grant 1-Mar-24 5:56am View

It sounds like you have hooked the form closing event and trying to process the DataGridView cells. you need to set a breakpoint in that code or break on all errors.

Graeme_Grant 25-Feb-24 21:51pm View

Ummm... a couple of things:
1. why are you answering a solved question from 2009? It is a 14 year old question!
2. Posting your email address publicly like that is asking to be spammed. Best remove it asap.

Graeme_Grant 25-Feb-24 21:46pm View

This is to address the issue of generating classes from JSON data and how to convert the raw JSON into usable classes. How you use it is then up to you.

FYI, the sample JSON that you posted is invalid.

Graeme_Grant 22-Feb-24 6:18am View

Deleted

.

Graeme_Grant 22-Feb-24 6:17am View

The purpose of the solution is to resolve the question: "My problem is the incorrect use of asynchrony. Executors should work in parallel. How to implement it correctly?". It does this clearly in the second part labelled "The manager".

Create a console app, add the code, then run it. Set breakpoints to see how it does it. The key is this line:

Task.WaitAny(tasks.ToArray());

Once you understand how asynchronous code runs, using the sample code provided, then you will be ready to update your code.

Graeme_Grant 21-Feb-24 4:29am View

Deleted

You are welcome :)

Graeme_Grant 21-Feb-24 3:53am View

Please do not answer 10+ year old questions. Focus on current questions instead.

Graeme_Grant 21-Feb-24 3:52am View

Sometimes the Roslyn compiler gets confused. Try closing VS, then deleting he Bin & Obj folders in the project, then restart, restore NuGet packages, then recompile.

Graeme_Grant 20-Feb-24 4:09am View

lol... 5'd

Graeme_Grant 14-Feb-24 23:47pm View

The error message is very specific. Check that you connection string is pointing correctly at the database.

Graeme_Grant 12-Feb-24 18:32pm View

Those rules are guidelines. There are instances/exceptions, like this one that you have created for yourself. You can mark specific rules to be ignored to stop the warning(s) or compiler errors if set to strict.

FYI: CA1040: Avoid empty interfaces (code analysis) - .NET | Microsoft Learn[^] states: "By default, this rule only looks at externally visible interfaces, but this is configurable."

Then states:
"If your design includes empty interfaces that types are expected to implement, you are probably using an interface as a marker or a way to identify a group of types. If this identification will occur at run time, the correct way to accomplish this is to use a custom attribute. Use the presence or absence of the attribute, or the properties of the attribute, to identify the target types. If the identification must occur at compile time, then it is acceptable to use an empty interface."

Trouble is, attributes add extra code and reflection overhead. Are Attributes a cleaner "looking" solution? Yes. Also, Attributes can be used anywhere and require strict checking to ensure compliance, ie: extra coding overhead.

This is your get out-of-jail comment (from the above link): "If the identification must occur at compile time, then it is acceptable to use an empty interface."

Graeme_Grant 10-Feb-24 19:22pm View

I totally understand. I too am a self-taught programmer, just giving back to the community that I have learnt from.

Graeme_Grant 10-Feb-24 18:19pm View

Thanks.

Graeme_Grant 10-Feb-24 4:37am View

Check this tip from a MS Senior Software Engineer in the .NET team: Size of Form and controls is bigger in WinForms .NET Core app compared to WinForms .NET Framework app · Issue #1948 · dotnet/winforms · GitHub[^] ... also this: Windows size issue. - Microsoft Q&A[^] ... Google search used: winform version changes sizing - Google Search[^]

Graeme_Grant 9-Feb-24 19:03pm View

This is an issue that is difficult to diagnose here with the information given. I think that i may know what is happening, and want to make sure that I have the right solution before answering.

So, to avoid excess time digging into code, can you create a new project with just one example, not your entire code base, that demonstrates the issue? If you can, update your question with a link and then we can run and see what is happening.

Graeme_Grant 9-Feb-24 18:54pm View

You miss the point, it has nothing to do with Blazor. The code executes in MAUI.

Graeme_Grant 8-Feb-24 23:01pm View

All good ... 2 down votes. I think that I upset some old timers.

Graeme_Grant 8-Feb-24 4:43am View

Cool ... now I'll go back into my corner and lick my wounds ... a 1 ... ouch! 😞

Graeme_Grant 8-Feb-24 4:38am View

If the option is open, I tend to lean towards Blazor for the UI, then use the BlazorWebView hosting to show the view. So a hybrid model. The Blazor code is not sandboxed, I can do bidirectional interaction between Blazor and the host app, be it WPF, Avalonia, MAUI, or Winforms. But if I have to, I still use XAML with WPF & Avalonia, MVVM pattern of course!

You can see how Blazor works with other UI frameworks here: Blazing.Mvvm - Blazor Server, WebAssembly, & Hybrid using Mvvm Community Toolkit[^]

Graeme_Grant 8-Feb-24 4:30am View

Just saw this ... did not see who posted... 😬

I'm old-school, so don't use the designer window view for WPF, besides, DI + MVVM = broken designer! I still code XAML by hand. I only use it for debugging while the app is running. Even then, in a very limited capacity. The same goes for coding web pages, hate designers for them too! Have no interest in UWP apps, so can't comment.

Graeme_Grant 5-Feb-24 3:51am View

Time to take the leap and modernise if you want the modern features...

Graeme_Grant 5-Feb-24 2:37am View

why use a version that is over 13 years old?

Graeme_Grant 4-Feb-24 21:45pm View

Your vote of 1 is overly hash as the solution given works exactly as given for the scope of works in the question asked. Check the screenshot.

Graeme_Grant 4-Feb-24 21:42pm View

Actually, please carefully read the question again:

"I need to change the color of text in TextBlock equal to color of Rectangle in another part of the Grid."

This reads as the same Grid, not a different Grid.

What is not expressed is if the controls are in different UserControls or not. We cannot make that assumption unless explicitly expressed.

Graeme_Grant 3-Feb-24 21:10pm View

"It sounds from all your responses that you have taken this great great responsibility of telling everyone in the world which technology..."

Not at all but I am advising that using a dead technology is not a good move. Mobile Operating Systems update annually and Xamarin will stop working very soon. But hey, the final choice is yours.

"...but you seriously get offended if anyone asks for architectural opinions."

I'm not offended at all. If I was you would know it.

Remember, you're asking for help and advice, so show respect and not attack when you get a response not inline with what you are "expecting". We are all here volunteering our time to help others.

Graeme_Grant 3-Feb-24 20:06pm View

"I am well aware of .NET MAUI as well, built several projects till date."
Yet you asked for Xamarin help... hmmm.

"expecting" ... hmmm.

Your understanding of "Deep Linking" is not correct. Deep links are a type of link that send users directly to an app instead of a website or a store. They are used to send users straight to specific in-app locations, saving users the time and energy locating a particular page themselves – significantly improving the user experience. Not to be used for web browsers.

You're better off writing a web browser extension.

Graeme_Grant 3-Feb-24 19:36pm View

It is not our job to write code for you, that is your job as a programmer.

If you have a bug or code not fully working correctly, post code that can reproduce the issue, not the entire project, then we're happy to look at it and suggest possible solutions.

Going by your question, and your response just above, you're not aware of MAUI, nor have spent any time using the framework and tools. So you need to spend time with it. I have pointed you to 3 very good resources to get you started. There is also Google Search with a wealth of information available to you.

However, if all that you want is someone to write code for you, then there are these services:
* fiverr[^]
* Upwork[^]
* Freelancer[^]
* Guru[^]
* PeoplePerHour[^]
* TaskRabbit[^]
* Karat[^]

Graeme_Grant 1-Feb-24 0:47am View

Tried many ways? So we can avoid offering a method that you have already tried, please list what methods that you have tried and why they do not work. Use the Improve question link provided above.

Graeme_Grant 30-Jan-24 5:10am View

Are you sure? Here: Launcher - .NET MAUI | Microsoft Learn[^] ... if you can do it from MAUI, you can do it from a hybrid app in MAUI.

Graeme_Grant 28-Jan-24 20:27pm View

Also asked here: Find longest word from dictionary based on offered letters c# - Microsoft Q&A[^]

Graeme_Grant 28-Jan-24 18:02pm View

And? Where is the question?

Graeme_Grant 28-Jan-24 5:24am View

That's a response page from the server. You need to read it as it will tell you why. IT usually means that your url is not correct.

Graeme_Grant 20-Jan-24 3:01am View

Update your question with sample code that you have tried. Use the green "improve question" link.

To be quite frank,there is more than enough information in the links provided for you to complete your task.

However, if you are expecting someone to write the code for you, without any attempt, then I recommend these websites:
* fiverr[^]
* Upwork[^]
* Freelancer[^]
* Guru[^]
* PeoplePerHour[^]
* TaskRabbit[^]
* Karat[^]

Graeme_Grant 18-Jan-24 5:13am View

Check out the links that I provided above.

Graeme_Grant 18-Jan-24 4:47am View

If you want someone to write code for you, then there are these services:
* fiverr[^]
* Upwork[^]
* Freelancer[^]
* Guru[^]
* PeoplePerHour[^]
* TaskRabbit[^]
* Karat[^]

Graeme_Grant 17-Jan-24 18:42pm View

The message is quite clear. It may be the error is pointing elsewhere in your code. If you comment out those lines does the error go away?

Graeme_Grant 17-Jan-24 17:58pm View

Without seeing the html markup that you are tyring to parse, we cannot comment on the code. Remember, we can not see your screen.

Graeme_Grant 17-Jan-24 11:50am View

5'ed. :)

Graeme_Grant 16-Jan-24 15:48pm View

I did not check the value type. However, unless you're passing the right value type at the binding, you need to use a converter to convert from one value type to another.

I have pointed you to a WPF tutorial site that explains all of this.

Graeme_Grant 15-Jan-24 12:33pm View

Answer updated. There is a little bit of work for you to do, but shouldn't be much.

Graeme_Grant 12-Jan-24 4:38am View

Not enough information to identify what you are using, the page that you are scraping, and why. We can not see your screen! FWIW, I prefer Playwright.

Your selector looks far too specific. Open the page in a web browser dev tools and have a closer look.

Even poorly designed websites have a structure to them. Are there no other identifiers that you can search for? Like an 'id' or class name(s)?

Graeme_Grant 7-Jan-24 19:56pm View

This answer appears to be commercial and spam in nature.

Graeme_Grant 6-Jan-24 17:44pm View

Which is basically saying what I have already said.

Graeme_Grant 5-Jan-24 17:50pm View

Seriously??? Proof is in the screenshot provided. You are not even trying.

Here... Wpf DataGrid Cell Background Color with no text - Imagebin[^] and here: Wpf DataGrid Cell Background Color with no text and no grid - Imagebin[^]

Graeme_Grant 5-Jan-24 17:49pm View

Seriously? The code was tested before posting. Create a new project, copy and paste the code and run it. Here is a screenshot of it running, and code used: Wpf Bind To Control Color - Imagebin[^]

Graeme_Grant 5-Jan-24 17:13pm View

With respect, the code was tested before being posted. I'll post the fully working code used in my answer to your other question, which also works.

Graeme_Grant 5-Jan-24 17:12pm View

Sorry? The code was tested before posting. Works 100%.

Graeme_Grant 5-Jan-24 17:08pm View

As Jo mentioned, I have given you a link to a working example of how to work with the MediaElement and advised how to track the state. All of the code and advice is right there, now it is up to you to do the programming for what you need.

Graeme_Grant 5-Jan-24 8:34am View

updated.

Graeme_Grant 5-Jan-24 8:27am View

Updated.

Graeme_Grant 5-Jan-24 7:11am View

Why not? It is how I would do it. It is a custom cell.

Graeme_Grant 28-Nov-23 15:15pm View

Blazor Hybrid or Blaz0r Web App? If Blaz0r Web App, then you backed the right horse, just more saddles to choose from. ;)

Graeme_Grant 28-Nov-23 14:30pm View

To me, looking at the code posted, it looked like Web Assembly hosted in ASP.NET Core with a web API controller. If I recall correctly, the File > New Project, prior to VS v17.8 (.Net 8.0) used the word "hosted" for an option for Blazor WASM. I could be wrong...

I would use minimal APIs with WASM, much cleaner.

Graeme_Grant 28-Nov-23 14:24pm View

Yes, you are right, nice catch ... not sure why I left that off freehand coding on here...

Graeme_Grant 28-Nov-23 3:11am View

If it is a static class, it will be fine.

Graeme_Grant 27-Nov-23 17:20pm View

Yes, that too ... but I was showing a more generic solution that could be used anywhere...

Missed class keyword - thanks, was a quick untested post. Fixing now.

Graeme_Grant 27-Nov-23 16:36pm View

You are missing code from your question. Click on the green Improve question link and post you column definitions.

Graeme_Grant 27-Nov-23 15:59pm View

Above is server-side code, has nothing to do with Blazor itself. The [HttpGet] should have given it away! ;)

Graeme_Grant 27-Nov-23 15:18pm View

You would have learnt about these in your programming class. If you don't have your notes, try using Google to search for what they are.

Graeme_Grant 25-Nov-23 2:07am View

Best place to ask is here: Issues · DuendeSoftware/Support · GitHub[^]

Graeme_Grant 23-Nov-23 22:48pm View

If you have correct dependencies, then no, you don't. It could be a breaking change that you have hit. ref: .NET breaking changes reference - .NET | Microsoft Learn[^].

Turn on strict Exception settings to see where in your code the issue is: Debug > Window > Exception Settings > tick "Common Runtime Exceptions".

If that does not isolate it, then maybe start blocking out sections of code to eliminate possibilities until the error disappears. Then you will know where to look.

Lastly, if everything fails, try reinstalling both the 32-bit and 64-bit .Net core SDKs on the server.

Graeme_Grant 23-Nov-23 16:16pm View

Deleted

[moved]

Graeme_Grant 23-Nov-23 12:01pm View

5'ed :P

Graeme_Grant 23-Nov-23 10:42am View

There is a lot of information missing in the above question.
* .Net (core) or .Net Framework? What version?
* Are you using a IOC container ? What IOC container library are you using?
* How are you binding the views to the ViewModels? Is there a specific 3rd party library being used?

Also, what line in your code is throwing the error?

Graeme_Grant 11-Nov-23 21:21pm View

Did you know that Syncfusion have a support forum: Blazor Forums | Syncfusion[^]

Graeme_Grant 7-Nov-23 4:00am View

I'm not going to run and debug your code for you, you need to do it. I will point you in the right direction.

You can set breakpoints in your javascript/jQuery on the client side and step through your code.

Again, you're not handling errors, both on the client and server sides. You need to fix this.

As I said before, if you have fixed the client-side, then set a breakpoint on the server side and step through your code. If your client post is not hitting the breakpoint in the server code, then you're pointing at the wrong endpoint or there is an error preventing your posting of data.

Graeme_Grant 7-Nov-23 3:29am View

That is a client side error that needs to be addressed. The message is very clear as to what the issue is and what you need to do to correct it.

Also check the server side once that is corrected.

Graeme_Grant 7-Nov-23 3:01am View

if it is not saving, then you must have an error. Are you debugging and stepping over the code to watch what happens?

Graeme_Grant 7-Nov-23 2:39am View

Did you try to debug the problem? Did you set a breakpoint and step over the code? Why is the code not in a try ... catch handler to catch any exceptions thrown? Write the error to console or debug to see what the error is. Set a breakpoint inside the exception and read the error details - the answer will be there.

Graeme_Grant 29-Oct-23 5:14am View

Look at the code given ... starting here:

switch (reader.TokenType)

Graeme_Grant 27-Oct-23 19:36pm View

5ed! I should add this to the growing list of examples on my articles: Working with Newtonsoft.Json in C# & VB[^] & Working with System.Text.Json in C#[^]

Graeme_Grant 27-Oct-23 19:31pm View

Yes, you are right. I failed to apply the last condition.

Graeme_Grant 27-Oct-23 8:30am View

You missed one :P

Total Amount: 319.350000

Graeme_Grant 25-Oct-23 3:27am View

Which line of code does the error occur on?

You are asking us for help, so you need to be specific. We cannot run your code.

Graeme_Grant 22-Oct-23 8:39am View

I fixed your appsettings issue where your connection string was not read. Your connection string not working with your DB is something different. Time for some debugging. The answer is in the error details. Ask a new question and include all of the error details, including stack traces, etc...

Graeme_Grant 14-Oct-23 5:14am View

"I want a solution to this problem" is not a very nice way of asking for help.

Graeme_Grant 12-Oct-23 19:41pm View

I've had another look and updated my solution.

Graeme_Grant 12-Oct-23 19:25pm View

I think that you missed the point. Dynamic is post compiler, not pre. This is why.

Graeme_Grant 11-Oct-23 10:06am View

The sample code is there, just in C#. I've shown you how to do convert it to VB.Net, and do it quickly. Now, it is up to you to do the work required. It's called programming.

If you want someone to write code for you, then there are these services:
* fiverr[^]
* Upwork[^]
* Freelancer[^]
* Guru[^]
* PeoplePerHour[^]
* TaskRabbit[^]
* Karat[^]

Graeme_Grant 11-Oct-23 5:37am View

What is your routing setup server side in Asp.Net?

Graeme_Grant 10-Oct-23 8:22am View

Lol, are you asking us to do your homework assignment for you?

If you want someone to write code for you, then there are these services:
* fiverr[^]
* Upwork[^]
* Freelancer[^]
* Guru[^]
* PeoplePerHour[^]
* TaskRabbit[^]
* Karat[^]

Graeme_Grant 10-Oct-23 8:16am View

If you have breakpoints, and they're not being hit, it is usually a good indication that the method is not called or where you placed the breakpoint is not being hit.

There is not enough posted in your question to determine what is happening.

Lastly, why are you deleting and reposting the same question? We do notice.

Graeme_Grant 9-Oct-23 18:27pm View

For a third time, still unsure which line is throwing the error... We can't run your code nor see your screen, so if you don't share, we can not help you. Use the "Improve question" link to add the extra details.

Graeme_Grant 9-Oct-23 8:23am View

You are using nullable parameters but you're not checking if any are null.

Which line is throwing the error? You also need to post the full error details. Use the "Improve question" link to add the extra details.

Graeme_Grant 5-Oct-23 7:50am View

Are you asking us how to write a filter or how to do the filtering based on your criteria?

Graeme_Grant 3-Oct-23 8:31am View

The error message is explicit: "item.totalPrice is null" - ie: your price value is not set, ie, null.

Set a breakpoint where you think that you are setting the price, then when the code pauses, inspect why. This is called "debugging your code".

Graeme_Grant 2-Oct-23 17:46pm View

This is not how you ask questions, only post solutions. Please either read the solution above or ask a new question.

Graeme_Grant 29-Sep-23 19:55pm View

Post the full error please by using the "Improve question" link above

Graeme_Grant 27-Sep-23 3:36am View

That is what I explained how to do. It's a hierarchical data structure.

Graeme_Grant 26-Sep-23 19:55pm View

Time to let go of VB6 and move to VB.Net (.Net 7.0) and the world of code, library, and support will be available to you... FYI, Visual Studio 2022 Community Edition is FREE....

Graeme_Grant 26-Sep-23 17:08pm View

It is a child to parent relationship. You add nodes to parent nodes.

Graeme_Grant 26-Sep-23 9:32am View

We can't see your screen from here ... What have you tried?

Graeme_Grant 26-Sep-23 6:57am View

What's the problem exactly? Is there an error?

Graeme_Grant 26-Sep-23 6:30am View

Glad to hear! :)

Graeme_Grant 25-Sep-23 8:54am View

You are welcome. :)

Graeme_Grant 25-Sep-23 7:26am View

We are trying to help you but you seem to know better....

Graeme_Grant 25-Sep-23 7:16am View

Why are you here asking for help then?

Graeme_Grant 25-Sep-23 7:09am View

use:

Console.WriteLine(ex)

or

Console.WriteLine(ex.ToString())

Graeme_Grant 25-Sep-23 7:05am View

lol...

Graeme_Grant 25-Sep-23 7:04am View

I'm trying to get him to look at the complete error message ... there should be more there for him.

Graeme_Grant 25-Sep-23 6:38am View

That's the message part, not the full error message.

MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)

ex.Message is only one part, there is lots more...

Graeme_Grant 25-Sep-23 6:36am View

I contemplated posting both usages but chose to keep it simple ... Hopefully, the above explains his "new" issue. The error message is the clue being ignored.

Graeme_Grant 25-Sep-23 6:34am View

...and the full error message?

Graeme_Grant 25-Sep-23 6:29am View

You know that we can't see your problem if you don't post the code ... right? Also, post the full error... You can do this by clicking on the "Improve question" link.

Graeme_Grant 25-Sep-23 5:51am View

And that is the problem.

using var stream = new MemoryStream();

This is the same as:

using var stream = new MemoryStream()
{
 // do work here
}

The return statement is taking the stream out of scope and the stream is being automatically closed.

For it to work, you need to pass the stream in, not out...

public void Export(MemoryStream stream)
{
    // do work here
}

Graeme_Grant 25-Sep-23 2:38am View

A bit like using an elephant gun to kill a mouse!

Graeme_Grant 24-Sep-23 23:08pm View

There is that ... lol ... Thanks, will post an update

Graeme_Grant 23-Sep-23 10:25am View

You know that we can't see your code if you don't post it? We also can't view your screen. Also, you do not tell us what type of app or what chart library that you are using.

To quote the help in the yellow box where you post your question:

A few simple rules when posting your question.

1. Be courteous. Everyone here helps because they enjoy helping, not because it's their job.
2. Have you searched or Googled for a solution?
3. Be specific! eg "How do I change the dialog colour?" instead of "My code doesn't work. Help?"
4. Tag your question appropriately.
5. If you have a school or university assignment, assume that your teacher or lecturer is also reading these forums.
6. Do not remove or empty a message if others have replied.
7. Your question may be edited or retagged by others. Anything inappropriate will be removed.

Graeme_Grant 22-Sep-23 21:14pm View

Again, where is the problem?

We're not here to do your programming for you. If you want someone to write code for you, then there are these services:
* fiverr[^]
* Upwork[^]
* Freelancer[^]
* Guru[^]
* PeoplePerHour[^]
* TaskRabbit[^]
* Karat[^]

Graeme_Grant 22-Sep-23 20:19pm View

And what is the problem?

Graeme_Grant 21-Sep-23 6:27am View

Please do not post code in comments.

What you are asking me to do is outside of the scope of Quick Answers forum. I have given you pointers to training materials to answer your variable scope issue causing your compile-time error. Now you need to roll up your sleeves and do some reading, learning and possibly more research. Good luck with it.

Graeme_Grant 21-Sep-23 5:52am View

This is programming 101... it depends on where you declared it and where you are using it. Move the declaration to where you need it.

Here are a couple of links that cover this topic in more detail for beginners like yourself:
* Variable Scopes in C#[^]
* Control variable scope and logic using code blocks in C# - Training | Microsoft Learn[^]

Graeme_Grant 21-Sep-23 3:58am View

Can't 5'd a comment ...

Graeme_Grant 21-Sep-23 3:34am View

WinForms? Wpf? Html/css? etc... Clarity please

Graeme_Grant 21-Sep-23 2:36am View

I'm not going to run your code.

I did create a quick MAUI app, and pointed at the codeproject home page and everything worked as expected. If your image is not showing, then I can only suggest that:
1. The javascrpt is not running
2. The javascript has a bug
3. The URI for the image is invalid

You need to set a breakpoint in your javascript and check that it is working correctly.

Graeme_Grant 21-Sep-23 1:56am View

the issue is not with my answer. I'll post a full example with output.

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