Serialize enum to string

Radzen Studio Blazor WebAssembly
1

Hi Radzen :v:

I have an entity with an enum property. When posting the entity to the server, I have an invalid ModelState, with the following error message:

Exception = "Cannot read the value '0' as a quoted JSON string value."

Inspecting the request body I see the property gets serialized to an int, and from looking around it seems OData expects an enum to be serialized to a string.

Passing in the following options to ODataJsonSerializer.Serialize in my AppDbService.cs didn't have any effect.

JsonSerializerOptions options = new JsonSerializerOptions
{
    Converters = { new JsonStringEnumConverter() }
};

When adding the following attribute to the property, I was able to get the serializer to convert it to its string representation.

[JsonConverter(typeof(JsonStringEnumConverter))]

Not sure if this behaviour is expected, or whether this might just assist someone in the future.

2

Serializing the enum as a string, breaks the PATCH request for the entity, with an exception being thrown in here in EntityPatch.cs:

https://github.com/radzenhq/radzen-examples/blob/a342c54d46785c2c1ec07a855915681a9d930bc5/BlazorCRMWasm/server/Data/EntityPatch.cs#L73

The exception message is:
"The given key '4' was not present in the dictionary."

3

Hi @damian_s,

Could you send us a sample application that reproduces the issue to info@radzen.com? The BlazorCRMWasm one doesn't use enums so it won't be of much help.

4

Hi @korchev,

Sure, I've sent a sample project along.

5

We haven't received anything yet. Make sure that the project is less than 20 MB in size (delete any obj and bin directories).

6

Strange. I'll send it again. It's a small sample project - probably about 2MB.

7

Seems like something was out of sync when I received the errors on the PATCH requests. Everything now just works.

Thanks for taking a look.