function 应用程序无法向事件网格发送消息：字典中不存在给定键“1”

Question

I have a function app with a function that sends message to event grid and a function in this same function app subscribed to this event grid topic. The function app that sends message to event grid uses key 1 to auth .

       //Name of the endpoint of Event grid topic
        string topicEndpoint = transformAlgoSendRMessage_TopicEP;
        //Creating client to publish events to eventgrid topic
        AzureKeyCredential credential = new AzureKeyCredential(eventGridTopic_Key);
        EventGridPublisherClient client = new EventGridPublisherClient(new Uri(topicEndpoint), credential);
        //Creating a sample event with Subject, Eventtype, dataVersion and data
        EventGridEvent egEvent = new EventGridEvent("TransformTelemetry", "TransformAlgorithm.broadcastTransform", "1.0", machinePartTransformTelemetry);
        // Send the event
        
        try
        {
            await client.SendEventAsync(egEvent);
            log.LogInformation("SendRTransformMessage sent transformdata - PosX:" + machinePartTransformTelemetry[1]);
        }
        catch (Exception e)
        {
            log.LogError("Failed to send SendRTransformMessage. " + e.Message);
        }

Code at execution of await client.SendEventAsync(egEvent) gives me error:

The given key '1' was not present in the dictionary.

I get the key using the azure portal copy to clipboard widget and paste in code. I also tried using powershell which confirmed the key.

az eventgrid topic key list --name eventgridtopicname --resource-group myresourcegroup --query "key1"

I'm using Azure.Messaging.EventGrid v4.12.0 and also tried Microsoft.Azure.Eventgrid v.3.2.0, I'm on VS2022 with latest update.

Answer 1

This doesn't look like an issue of whether the Acces Key was valid or not, and you've ruled it out by verifying via CLI command in Powershell.

The "key" in the error message is likely in reference to the missing item in the dictionary type, which I suspect is this: machinePartTransformTelemetry[1]

More context on the error message: The given key was not present in the dictionary. Which key?