Hi Lee,
Greetings from Syncfusion support.
We have reviewed your query and understand that you have concerns
regarding our code in the Dashboard Layout component Sample Browser
demo. We suggest you to follow the below details to get answer for your
queries.
Query 1 : Regarding ThemeHelper.
We would like to inform you that internally, we utilize the ThemeHelper
class to facilitate theme switching for the Dashboard Layout component
in our sample browser demo, providing to user preferences.
If you intend to utilize a specific theme, we recommend
referencing the theme in the App.razor file for your WebApp. You can
find detailed instructions for both server and WASM applications
in the following documentation links.
WebApp : https://blazor.syncfusion.com/documentation/file-manager/getting-started-with-web-app#add-stylesheet-and-script-resources
Server and WASM application : https://blazor.syncfusion.com/documentation/file-manager/getting-started#add-stylesheet-and-script-resources
Additionally we have attached available theme for your
reference.
Documentation : https://blazor.syncfusion.com/documentation/appearance/themes
Query 2 : SampleService is missing.
Internally, we utilize the SampleService file and
access the image path from it for the Dashboard Layout component. To
resolve this issue, we recommend providing the corresponding path from which
you wish to retrieve the image and assign it to the background-image property.
Check out the shared details and get back to us if you need
any further assistance.
Regards,
Suresh.