Null Reference Exception .net core 3.0.10 Server side blazor

[mischa71lab]

Hi,

I'm getting a null reference exception when i use this code:

await Storage.SetItemAsync("Token", "bla");
var token = await Storage.GetItemAsync("Token");

any ideas?

NullReferenceException: Object reference not set to an instance of an object. Microsoft.AspNetCore.Components.Server.Circuits.RemoteJSRuntime.BeginInvokeJS(long asyncHandle, string identifier, string argsJson) Microsoft.JSInterop.JSRuntime.InvokeAsync(string identifier, CancellationToken cancellationToken, object[] args) Cloudcrate.AspNetCore.Blazor.Browser.Storage.StorageBase+JsRuntimeAccessBase.InvokeAsync(string identifier, IEnumerable

[mischa71lab]

on another blazor storage package i read this:

Due to pre-rendering in Blazor Server you can't perform any JS interop until the OnAfterRender lifecycle method.

Doing this seems to have solved the issue:

protected override async Task OnAfterRenderAsync()
    {
       await Storage.SetItemAsync("Token", "bla");
       var token = await Storage.GetItemAsync("Token");
    };

[LunicLynx]

Yes i think, while pre-rendering there is no way to access the browser storage.

[LunicLynx]

I'll try to add a better error message

[mischa71lab]

thanks. maybe add this to example how to use server side

protected override async Task OnAfterRenderAsync()