NET8 Azure Function can't convert a json message from a service bus

Question

I'm creating a very simple Azure Function with NET8.

public async Task Run(
    [ServiceBusTrigger("wordvoice", Connection = "SBConnectionString")] 
    string message)
{
    AudioServiceBusRequest request = 
        JsonSerializer.Deserialize<AudioServiceBusRequest>(message);

    await ProcessService.ProcessAudio(request, processName, _logger);
}

In the service bus, I add a simple json like that

{
    "wordId": 33,
    "language": 1,
    "word": "go"
}

I created a model to receive this json

public class AudioServiceBusRequest
{
    [JsonPropertyName("wordId")]
    public long? WordId { get; set; }
    [JsonPropertyName("language")]
    public string Language { get; set; }
    [JsonPropertyName("word")]
    public string Word { get; set; }
}

When the message is received by the Azure Function, I get at least 90 lines of errors starting with

Exception: System.AggregateException: One or more errors occurred. (The JSON value could not be converted to System.String. Path: $.language | LineNumber: 2 | BytePositionInLine: 17.)

---> System.Text.Json.JsonException: The JSON value could not be converted to System.String. Path: $.language | LineNumber: 2 | BytePositionInLine: 17.

---> System.InvalidOperationException: Cannot get the value of a token type 'Number' as a string.

I'm using the same json in an Azure Function built with NET6 and it is working.

Basic · Accepted Answer · 2023-11-26 17:01:58Z

2

You're defining language and wordId as string...

[JsonPropertyName("language")]
public string Language { get; set; }
[JsonPropertyName("wordId")]
public string WordId { get; set; }

Change them to be int instead, to match your data.

edited Nov 26, 2023 at 17:01

answered Nov 24, 2023 at 18:21

Basic

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