Using Global Variables in export controller

Radzen Studio Blazor Server
1

Hi,
I would like to use some global variables in one of the export controller methods so I have declared it as below

        private readonly BWiseContext context;
        private readonly BWiseService service;
        private readonly GlobalsService Globals;
        public ExportBWiseController(BWiseContext context, BWiseService service, GlobalsService globals)
        {
            this.service = service;
            this.context = context;
            Globals = globals;
        }

and on button click below code

await BWise.ExportBankMainsToCSV();

How ever I get following error during runtime at the export button click event.

image
image1168×599 57.9 KB

If I remove the globals variable from the controller the error is resolved. Could you please guide how to use global variable in export controller
Thanks

2

Unfortunately you can't use the globals service in a controller. Services added via AddScoped are not the same instance as the one available to the blazor components. As a result the global properties will be missing (not set) in the controller. This is an implementation detail of how Blazor is implemented - the Blazor code (components) runs in a separate thread/process than the controllers.

A possible workaround is to pass the required properties as additional parameters of the controller methods.

Updated my reply to be technically sound.

3

Thanks for your valuable feedback.