Syncfusion DataGrid : The converter specified on 'Syncfusion.Blazor.DataManager.Json' is not compatible with the type 'System.Collections.Generic.IEnu

14 Replies
7 Participants
Marked answer

Created by
AK Avinash Kumar

Platform
Blazor

Platform
Blazor

Control
Grid

Created On
Sep 19, 2022 03:34 PM UTC

Last Activity On
Oct 30, 2022 05:50 AM UTC

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Hi Folks,

Help me resolve below issue.. this is a simple copy-paste of grid code from site, but it is giving below error-

------------------

[2022-09-19T15:05:27.220Z] Error: System.InvalidOperationException: The converter specified on 'Syncfusion.Blazor.DataManager.Json' is not compatible with the type 'System.Collections.Generic.IEnumerable`1[System.Object]'.

at System.Text.Json.ThrowHelper.ThrowInvalidOperationException_SerializationConverterOnAttributeNotCompatible(Type classTypeAttributeIsOn, MemberInfo memberInfo, Type typeToConvert)

at System.Text.Json.Serialization.Metadata.DefaultJsonTypeInfoResolver.GetConverterFromAttribute(JsonConverterAttribute converterAttribute, Type typeToConvert, MemberInfo memberInfo, JsonSerializerOptions options)

at System.Text.Json.Serialization.Metadata.ReflectionJsonTypeInfo`1.CreateProperty(Type typeToConvert, MemberInfo memberInfo, JsonSerializerOptions options, Boolean shouldCheckForRequiredKeyword)

at System.Text.Json.Serialization.Metadata.ReflectionJsonTypeInfo`1.AddPropertiesAndParametersUsingReflection()

at System.Text.Json.Serialization.Metadata.ReflectionJsonTypeInfo`1..ctor(JsonConverter converter, JsonSerializerOptions options)

at System.Text.Json.Serialization.JsonConverter`1.CreateReflectionJsonTypeInfo(JsonSerializerOptions options)

at System.Text.Json.Serialization.Metadata.DefaultJsonTypeInfoResolver.CreateJsonTypeInfo(Type type, JsonSerializerOptions options)

at System.Text.Json.Serialization.Metadata.DefaultJsonTypeInfoResolver.GetTypeInfo(Type type, JsonSerializerOptions options)

at System.Text.Json.JsonSerializerOptions.GetTypeInfoNoCaching(Type type)

at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)

at System.Text.Json.JsonSerializerOptions.GetTypeInfoInternal(Type type, Boolean ensureConfigured, Boolean resolveIfMutable)

at System.Text.Json.Serialization.Metadata.JsonPropertyInfo.Configure()

at System.Text.Json.Serialization.Metadata.JsonTypeInfo.InitializePropertyCache()

at System.Text.Json.Serialization.Metadata.JsonTypeInfo.Configure()

at System.Text.Json.Serialization.Metadata.JsonTypeInfo.g__ConfigureLocked|138_0()

at System.Text.Json.JsonSerializerOptions.GetTypeInfoInternal(Type type, Boolean ensureConfigured, Boolean resolveIfMutable)

at System.Text.Json.Serialization.JsonConverter.ResolvePolymorphicConverter(Object value, JsonTypeInfo jsonTypeInfo, JsonSerializerOptions options, WriteStack& state)

at System.Text.Json.Serialization.JsonConverter`1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)

at System.Text.Json.Serialization.Converters.DictionaryDefaultConverter`3.OnWriteResume(Utf8JsonWriter writer, TDictionary value, JsonSerializerOptions options, WriteStack& state)

at System.Text.Json.Serialization.JsonDictionaryConverter`3.OnTryWrite(Utf8JsonWriter writer, TDictionary dictionary, JsonSerializerOptions options, WriteStack& state)

at System.Text.Json.Serialization.JsonConverter`1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)

at System.Text.Json.Serialization.JsonConverter`1.WriteCore(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)

at System.Text.Json.JsonSerializer.WriteCore[TValue](Utf8JsonWriter writer, TValue& value, JsonTypeInfo`1 jsonTypeInfo)

at System.Text.Json.JsonSerializer.WriteString[TValue](TValue& value, JsonTypeInfo`1 jsonTypeInfo)

at Syncfusion.Blazor.Grids.SfGrid`1.SerializeModel(SfGrid`1 comp)

at Syncfusion.Blazor.Grids.SfGrid`1.OnAfterRenderAsync(Boolean firstRender)

at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, ComponentState owningComponentState)

------------------

code as below -

------------------

@page "/product/price/{Id:int}"

@inject IProductRepository _productRepository

@inject IProductPriceRepository _productPriceRepository

Product Price Management

@if (IsLoading)

{

}

else

{

@Product.Name

Category: @Product.Category.Name

Description: @((MarkupString)Product.Description)

}

@code {

[Parameter]

public int Id { get; set; }

private ProductDTO Product { get; set; } = new();

private IEnumerable ProductPrices { get; set; } = new List();

private bool IsLoading { get; set; } = true;

protected override async Task OnAfterRenderAsync(bool firstRender)

{

if (firstRender)

{

IsLoading = true;

StateHasChanged();

Product = await _productRepository.GetById(Id);

ProductPrices = await _productPriceRepository.GetAll(Id);

IsLoading = false;

StateHasChanged();

}

//public async void ActionHandler(ActionEventArgs args)

//{

//}

}

------------------

*based on the documentation [link: blazor.syncfusion.com/documentation/datagrid/data-binding] I tried passing TValue but no luck.

*I have also configured : NewtonsoftJson, based on syncfusion help posts for Syncfusion.Blazor.DataManager.Json errors.

Help me overcome this issue..

Thanks in Advance.

14 Replies 1 reply marked as answer

NP Naveen Palanivel Syncfusion Team September 21, 2022 04:19 AM UTC

Hi Avinash,

Greetings from Syncfusion support.

We checked your query and you facing issue.We need some more information, Kindly share the below details to validate further at our end.

Share us entire Grid code snippet along with model class.
Share us the video demonstration of the issue with detailed replication procedure.
If possible share us an simple issue reproduceable sample

The above-requested details will be helpful for us to validate the reported query at our end and provide the solution as early as possible.

Regards,

Naveen Palanivel

AK Avinash Kumar replied to Naveen Palanivel September 21, 2022 06:55 AM UTC

Dear Navin,

Thanks for your reply.

To understand issue clearly... I have created new page with the demo example scenario.

Sharing you the scripts below:

-------------------------- Script Start --------------------------

@page "/product/price1/{Id:int}"

<h3>ProdPrice</h3>

</SfGrid>

@code {

[Parameter]

public int Id { get; set; }

public List<Order> Orders { get; set; }

protected override void OnInitialized()

{

Orders = Enumerable.Range(1, 15).Select(x => new Order()

{

OrderId = 1000 + x,

CustomerId = (new string[] { "ALFKI", "ANANTR", "ANTON", "BLONP", "BOLID" })[new Random().Next(5)],

Freight = 2.1 * x,

OrderDate = DateTime.Now.AddDays(-x)

}).ToList();

}

public class Order

{

public int? OrderId { get; set; }

public string CustomerId { get; set; }

public DateTime? OrderDate { get; set; }

public double? Freight { get; set; }

}

-------------------------- Script End --------------------------

Script is just a copy paste of video example.

This is generating same error message as shared earlier.

--------------------- Error message Start-------------------

blazor.server.js:1

[2022-09-21T06:51:02.399Z] Error: System.InvalidOperationException: The converter specified on 'Syncfusion.Blazor.DataManager.Json' is not compatible with the type 'System.Collections.Generic.IEnumerable`1[System.Object]'.