Hallo,
I use objects with and without change tracking. For implementing change tracking for these objects, I use a dynamic proxy factory, which adds the change tracking feature. As a result, the proxied objects are changed in type. The base type is always the type of the object, but the return type is the proxied objects.
The RadzenGrid itself is initialized (TItem) with the (base) object and also the property TItem of the grid has the (base) object class.
When I then bind the proxied list of objects to the grid instance, I got an error:
System.Collections.Generic.KeyNotFoundException: The given key 'Entities.ModelEntity' was not present in the dictionary.
at System.Collections.Generic.Dictionary2.get_Item(TKey key) at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl) at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, 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.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, 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.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, 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.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, 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.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, 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.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, Int32 newFrameIndex) at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl) 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 Microsoft.AspNetCore.Components.HtmlRendering.Infrastructure.StaticHtmlRenderer.HandleException(Exception exception) at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue() at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessPendingRender() at Microsoft.AspNetCore.Components.ComponentBase.StateHasChanged() at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task) at Radzen.Blazor.RadzenDataGrid1.InvokeLoadData(Int32 start, Int32 top) in C:\DEV\repos\Archive\radzen-blazor-master\Radzen.Blazor\RadzenDataGrid.razor.cs:line 2190
at Radzen.Blazor.RadzenDataGrid1.ReloadInternal() in C:\DEV\repos\Archive\radzen-blazor-master\Radzen.Blazor\RadzenDataGrid.razor.cs:line 2120 at Radzen.Blazor.RadzenDataGrid1.Reload() in C:\DEV\repos\Archive\radzen-blazor-master\Radzen.Blazor\RadzenDataGrid.razor.cs:line 2085
at Essentials.Shared.Components.ModelStore.OnInitializedAsync() in C:\DEV\repos\Development\Essentials\Projects\Essentials.Shared\Components\ModelStore.razor.cs:line 104
at Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync()
at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, ComponentState owningComponentState)
at Microsoft.AspNetCore.Components.HtmlRendering.Infrastructure.StaticHtmlRenderer.HandleException(Exception exception)
at Microsoft.AspNetCore.Components.RenderTree.Renderer.HandleExceptionViaErrorBoundary(Exception error, ComponentState errorSourceOrNull)
at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, ComponentState owningComponentState)
at Microsoft.AspNetCore.Components.Endpoints.EndpointHtmlRenderer.g__Execute|43_0()
at Microsoft.AspNetCore.Components.Endpoints.EndpointHtmlRenderer.WaitForResultReady(Boolean waitForQuiescence, PrerenderedComponentHtmlContent result)
at Microsoft.AspNetCore.Components.Endpoints.EndpointHtmlRenderer.RenderEndpointComponent(HttpContext httpContext, Type rootComponentType, ParameterView parameters, Boolean waitForQuiescence)
at Microsoft.AspNetCore.Components.Endpoints.RazorComponentEndpointInvoker.RenderComponentCore(HttpContext context)
at Microsoft.AspNetCore.Components.Endpoints.RazorComponentEndpointInvoker.RenderComponentCore(HttpContext context)
at Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext.<>c.<b__10_0>d.MoveNext()
--- End of stack trace from previous location ---
at Microsoft.AspNetCore.Builder.ServerRazorComponentsEndpointConventionBuilderExtensions.<>c__DisplayClass1_1.<b__1>d.MoveNext()
--- End of stack trace from previous location ---
at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext context)
I guess that the grid or its dependencies tries to find the base object type 'ModelEntity' but can't find them because its a proxied object with a different type.
Is there any idea to come over this issue?
Thnaks,
Christian