Fetching Stock Prices and Refactoring API Calls - FULL STACK WPF (.NET CORE) MVVM #7

I create a service class to fetch the price of a stock for a symbol. After noticing some duplication between the StockPriceService and the MajorIndexService, I refactor both classes by introducing a custom HttpClient. I also create a custom exception to throw when invalid symbols are passed to the StockPriceService. Lastly, I do some cleanup throughout the application by throwing an exception as a default for a switch statement, getting a more pleasant name for MajorIndexes, and renaming the Stock class to Asset.

In this series, I walk through the development of a WPF application from the database layer to the UI layer.

[sivakumarr]

I used bindings a lot of times, but I am unaware of FallbackValue. I am learning new things every day from you. Thanks Sean.

[faraz-online]

Bundle of Thanks Sean!!!
This valuable series of yours has turned out to be a Great Treasure for sure!

[thomasbarratt]

Thanks for explaining the reason why you've stored the interfaces in the Domain. This makes a lot of sense and agree it's a much better to move the dependency away from a concrete API implementation - will be changing my current project's structure to match.

[marilu]

All this is new for me, I hope to be able to carry out my own project at the end of this course.
Thanks for giving away such good material, my best wishes to the author.

[waderay]

Sean, Thank you for these videos. I've been learning C# and just getting my feet wet with WPF. I am more versed in C++ Win32 and this is a huge lift for me to switch my approach. It is all still confusing since I'm still new to c#, OOP, WPF, Entity Framework, Dependency Injection, etcetera... I've spend a lot of hours going over your videos and following along as you develop this project. I've been trying to implement some of these concepts to refactor an old Win32 app that I have wanted to re-write for a while. I can't thank you enough this has been very helpful and my re-write is going surprisingly well so far. I'm beginning to really like the WPF UI now that I've been able to make a few things work which is just enough of a push to keep learning.

[jcturpin]

Hi, I was wondering if setting Price in StockPriceResult to double? would be an ok alternative. I tried it out and the json deserialization seemed to work ok. that way an exception could be thrown on null instead of zero. Zero would most likely never be a realistic price, so it should reliably be used as an exception... but this idea might be usable in a different use case for a different type of API call where 0 is acceptable. Do you know of any pitfalls in using it? thx for another great episode. :-)

[vandeljasonstrypper]

Very valuable instructions. But highly recommend move to UWP since Windows on ARM is the real future now

[fluffymaverick]

Thanks Sean. Update the API endpoint for real time stock prices can be access only by premium members

[rightbracketethicalhacker]

Thank you for this tutorial. Why you createing classes for every method, like Sellstock service, Buystock service, wt about to have Stock service. It might end up with enormous number of classes when making real application

[jamesgrainger]

I have been trying to figure this out for the last few weeks and you have made these videos just in time! If you could show how to get the financial statements like the balance sheet from the Json links into a table that would be fantastic! I've yet to find a solution... Great video!

[jackkendall]

Minor question, and you might cover this later, but isn't it better to use decimal instead of double for monetary calculations?

[jamespope]

Is there a way to make your API calls return a single Json object instead of an array? I'm only getting arrays returned and its causing errors with Newtonsoft.

[bgupta]

Hey!
Great series so far... Is there more to come?? eagerly waiting.

[shahjahan]

Great series so far. My client requirement is Apply clean Architecure In wpf Application. Would you please make a video to clarify clean architecture - Interface Business Rule, Application Business Rule, Interface Adapter, Framework and Drivers?

[VinuP]

Hi Thanks for the video. Can you please continue videos on Custom control development?

[Saleca]

apparently even thou stock can be 0 is not 'tradable'.