Can't design in Blazor Studio - can't resolve DialogService

Radzen Blazor Studio
1

This is version 1.45.0

Cannot provide a value for property 'DialogService' on type 'MyProject.Components.Layout.MainLayout'. There is no registered service of type 'Radzen.DialogService'.
at Microsoft.AspNetCore.Components.ComponentFactory.<>c__DisplayClass9_0.g__Initialize|1(IServiceProvider serviceProvider, IComponent component)
at Microsoft.AspNetCore.Components.ComponentFactory.InstantiateComponent(IServiceProvider serviceProvider, Type componentType, IComponentRenderMode callerSpecifiedRenderMode, Nullable1 parentComponentId) at Microsoft.AspNetCore.Components.RenderTree.Renderer.InstantiateChildComponentOnFrame(RenderTreeFrame[] frames, Int32 frameIndex, Int32 parentComponentId) at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewComponentFrame(DiffContext& diffContext, Int32 frameIndex) at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewSubtree(DiffContext& diffContext, Int32 frameIndex) at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InsertNewFrame(DiffContext& diffContext, Int32 newFrameIndex) at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl) at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.ComputeDiff(Renderer renderer, RenderBatchBuilder batchBuilder, Int32 componentId, ArrayRange1 oldTree, ArrayRange`1 newTree)
at Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment, Exception& renderFragmentException)
at Microsoft.AspNetCore.Components.RenderTree.Renderer.RenderInExistingBatch(RenderQueueEntry renderQueueEntry)
at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
--- End of stack trace from previous location ---
at Radzen.Server.RemoteRenderer.HandleException(Exception exception)
at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessPendingRender()
at Microsoft.AspNetCore.Components.RenderTree.Renderer.AddToRenderQueue(Int32 componentId, RenderFragment renderFragment)
at Microsoft.AspNetCore.Components.RenderHandle.Render(RenderFragment renderFragment)
at Radzen.Server.Router.Render(Type layout, Type component, Boolean renderLayout)
at Radzen.Server.Router.OnRouteChanged(Object sender, RouteChangedEventArgs e)
at Radzen.Server.RouterService.Route(Type component, Type defaultLayout, Boolean renderLayout)
at Radzen.Server.CircuitHost.AddComponent(Type layout, Type page, Boolean renderLayout)
at Radzen.Server.ProjectServer.Render(String fileName, String source, Boolean renderLayout)
at Radzen.Server.ProgramController.Render(RenderRequest request)

I have this in my program.cs

builder.Services.AddRadzenComponents();

I tried adding the same services individually to see if it'd make a difference, but it didn't.

builder.Services.AddScoped<Radzen.DialogService>();
builder.Services.AddScoped<Radzen.NotificationService>();
builder.Services.AddScoped<Radzen.TooltipService>();
builder.Services.AddScoped<Radzen.ContextMenuService>();
builder.Services.AddScoped<Radzen.ThemeService>();

2

Hi @blurred83,

This could happen if there is some exception in the code before registering the Radzen services. You can try using the C# preprocessor to hide such code from design time builds.

1 Like
3

Perfect - thanks - that resolved the issue. I wrapped all of my service registrations other than Radzen services in the preprocessor directive and my designer/toolbox is working again.

In Program.cs:

builder.Services.AddRadzenComponents();
builder.Services.AddRadzenCookieThemeService(...);

#if !RADZEN
// other service registrations here
#endif