Nullable Types

[tkettani]

Hello thanks for the great work on this library
i just came across an issue, when one of my POCO fields is a nullable type (int?, bool? etc) i get this error:

blazor.server.js:15 [2020-10-06T21:54:43.076Z] Error: System.InvalidOperationException: Unable to set property 'ValueChanged' on object of type 'VxFormGenerator.Components.Bootstrap.BootstrapInputNumber`1[[System.Int32, System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]]'. The error was: Unable to cast object of type 'Microsoft.AspNetCore.Components.EventCallback`1[System.Nullable`1[System.Int32]]' to type 'Microsoft.AspNetCore.Components.EventCallback`1[System.Int32]'.
 ---> System.InvalidCastException: Unable to cast object of type 'Microsoft.AspNetCore.Components.EventCallback`1[System.Nullable`1[System.Int32]]' to type 'Microsoft.AspNetCore.Components.EventCallback`1[System.Int32]'.
   at Microsoft.AspNetCore.Components.Reflection.MemberAssignment.PropertySetter`2.SetValue(Object target, Object value)
   at Microsoft.AspNetCore.Components.Reflection.ComponentProperties.<SetProperties>g__SetProperty|2_0(Object target, IPropertySetter writer, String parameterName, Object value)
   --- End of inner exception stack trace ---
   at Microsoft.AspNetCore.Components.Reflection.ComponentProperties.<SetProperties>g__SetProperty|2_0(Object target, IPropertySetter writer, String parameterName, Object value)
   at Microsoft.AspNetCore.Components.Reflection.ComponentProperties.SetProperties(ParameterView& parameters, Object target)
   at Microsoft.AspNetCore.Components.ParameterView.SetParameterProperties(Object target)
   at Microsoft.AspNetCore.Components.Forms.InputBase`1.SetParametersAsync(ParameterView parameters)
   at Microsoft.AspNetCore.Components.Rendering.ComponentState.SetDirectParameters(ParameterView parameters)
   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, ArrayRange`1 oldTree, ArrayRange`1 newTree)
   at Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment)
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.RenderInExistingBatch(RenderQueueEntry renderQueueEntry)
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()

by the way in my startup i am defining the initial setup as such:

        public FormGeneratorComponentsRepository BootstrapFormMapping = new FormGeneratorComponentsRepository(
            new Dictionary<string, Type>()
            {
                {typeof(string                                              ).ToString(), typeof(BootstrapInputText)                },
 
                {typeof(DateTime?                                           ).ToString(), typeof(InputDate<>)                       },
                {typeof(bool?                                               ).ToString(), typeof(BootstrapInputCheckbox)            },
                {typeof(decimal?                                            ).ToString(), typeof(BootstrapInputNumber<>)            },
                {typeof(Int32?                                              ).ToString(), typeof(BootstrapInputNumber<>)            },
                {typeof(Int64?                                              ).ToString(), typeof(BootstrapInputNumber<>)            },
                {typeof(float?                                              ).ToString(), typeof(BootstrapInputNumber<>)            },
                {typeof(double?                                             ).ToString(), typeof(BootstrapInputNumber<>)            },

                {typeof(Core.Entities.Project.Status 	                    ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },     
                {typeof(Core.Entities.Project.OrderType 	                ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },
                {typeof(Core.Entities.Project.CustomerLayout 	            ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },
                {typeof(Core.Entities.Project.CreditApprovalOptions         ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },
                {typeof(Core.Entities.Project.FollowUpStatus 	            ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },
                {typeof(Core.Entities.Project.FollowUpLossExplanation       ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },
                {typeof(Core.Entities.Project.ShippingFOB 	                ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },
                {typeof(Core.Entities.Project.ShippingVia 	                ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },
                {typeof(Core.Entities.Project.ShippingMethod 	            ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },
                {typeof(Core.Entities.Project.ShippingTruckSize 	        ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },
                {typeof(Core.Entities.Project.Currency 	                    ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },
                {typeof(Core.Entities.Project.TransportTruckType 	        ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },
                {typeof(Core.Entities.Project.ProjectType 	                ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },
                {typeof(Core.Entities.Project.ProductionType 	            ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },
                {typeof(Core.Entities.Project.QCErrorZone 	                ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },
                {typeof(Core.Entities.Project.QCErrorType 	                ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },
                {typeof(Core.Entities.Project.BorderCrossing 	            ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },
                {typeof(Core.Entities.Project.FollowUpStopExplanation       ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },
                {typeof(Core.Entities.Project.ProductionSource 	            ).ToString(), typeof(BootstrapInputSelectWithOptions<>) },

                //{typeof(ValueReferences<FoodKind>).ToString(), typeof(BootstrapInputCheckboxMultiple<>) },
                //{typeof(Color).ToString(), typeof(InputColor) }

            }, null, typeof(BootstrapFormElement<>));

thanks for any help or pointers on how to go around this issue.
cheers from Canada !!

[Aaltuj]

hey @tkettani sorry didn't got a message about the issue. Yeah i haven't tried it with nullable types. Thanks for the pull request. I'll appreciate the input but I've added a new version that would split the component repos, so i close the pull request. . I'll take a look and incorporate your suggestion in the next version. I'm still in the progress of setting up the development pipeline and documentation. Take a look at the new master. That would render your ENUM (i assume) list redundant.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[Joni-Torrado]

Hi,
I have the same problem.
When this will be fixed?

[Aaltuj]

this is already addressed in 0.4.0. So update to latest or if you have 0.4.0 you may have found a new bug: create an issue with the reproduction steps.