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karl.ettinger@energieag.at created
When creating a Blazor-Server application via "abp suite" (V7.2.1), without any additional code, when starting the created web application, the error below is displayed in the web browser (Edge, Chrome). If I then click on "Reload" the web application is started.
- ABP Framework version: v7.2.2
- UI type: Blazor
- DB provider: EF Core
- Exception message and stack trace: blazor.server.js?_v=638153017680000000:1 [2023-05-22T15:09:45.739Z] Information: Normalizing '_blazor' to 'https://localhost:44336/_blazor'. blazor.server.js?_v=638153017680000000:1 [2023-05-22T15:09:45.854Z] Information: WebSocket connected to wss://localhost:44336/_blazor?id=Y3_rJ1QdR9rsJLkWvBwskg. blazor.server.js?_v=638153017680000000:1 [2023-05-22T15:09:46.768Z] Error: System.NullReferenceException: Object reference not set to an instance of an object. at Volo.Abp.AspNetCore.Components.Web.LeptonXTheme.Components.ApplicationLayout.SideMenu.Navigation.MobileNavbar.BuildRenderTree(RenderTreeBuilder __builder) at Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment, Exception& renderFragmentException) log @ blazor.server.js?_v=638153017680000000:1 blazor.server.js?_v=638153017680000000:1 [2023-05-22T15:09:46.769Z] Information: Connection disconnected. blazor.server.js?_v=638153017680000000:1 Uncaught (in promise) Error: Invocation canceled due to the underlying connection being closed. at Ft._connectionClosed (blazor.server.js?_v=638153017680000000:1:76250) at Ft.connection.onclose (blazor.server.js?_v=638153017680000000:1:67065) at Nt._stopConnection (blazor.server.js?_v=638153017680000000:1:62559) at transport.onclose (blazor.server.js?_v=638153017680000000:1:60297) at At._close (blazor.server.js?_v=638153017680000000:1:52510) at At.stop (blazor.server.js?_v=638153017680000000:1:52130) at Nt._stopInternal (blazor.server.js?_v=638153017680000000:1:55448) at async Nt.stop (blazor.server.js?_v=638153017680000000:1:55258) at async Ft.stop (blazor.server.js?_v=638153017680000000:1:69730)
4 Answer(s)
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hi
Does this error occur every time?
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hi yes
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hi
Please share your project, Thanks
liming.ma@volosoft.com
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hi
Add
MyMobileNavbarto your blazor project. We will fix that in the next version. Your question credit is refunded.using System.Collections.Generic; using Volo.Abp.AspNetCore.Components.Web.LeptonXTheme.Components.ApplicationLayout.SideMenu.Navigation; using Volo.Abp.AspNetCore.Components.Web.LeptonXTheme.Navigation; using Volo.Abp.DependencyInjection; namespace EagEz.Test.Blazor; [Dependency(ReplaceServices = true)] [ExposeServices(typeof(MobileNavbar), typeof(MyMobileNavbar))] public class MyMobileNavbar : MobileNavbar { public MyMobileNavbar() { SelectedMenuItems = new List<MenuItemViewModel>(); } }
