【Azure 事件中心】从Azure Event Hub中消费数据，如何查看当前消费客户端消费数据的Offset和SequenceNumber呢(消息偏移量和序列号)？

问题描述

当通过Azure Event Hub SDK消费Event Hub中的消息时，必须指定一个Storage Account（存储账号）用于保存 Checkpoint (检查点)。

比如在C#代码中，需要指定Storage Account Connection String 和一个Blob Container的名称。其他语言代码也是一样，都需要指定Storage Account。

    private const string ehubNamespaceConnectionString = "<EVENT HUBS NAMESPACE - CONNECTION STRING>";
    private const string eventHubName = "<EVENT HUB NAME>";
    private const string blobStorageConnectionString = "<AZURE STORAGE CONNECTION STRING>";
    private const string blobContainerName = "<BLOB CONTAINER NAME>";

...... 

  static async Task Main()
    {
        // Read from the default consumer group: $Default
        string consumerGroup = EventHubConsumerClient.DefaultConsumerGroupName;

        // Create a blob container client that the event processor will use 
        storageClient = new BlobContainerClient(blobStorageConnectionString, blobContainerName);

        // Create an event processor client to process events in the event hub
        processor = new EventProcessorClient(storageClient, consumerGroup, ehubNamespaceConnectionString, eventHubName);

        // Register handlers for processing events and handling errors
        processor.ProcessEventAsync += ProcessEventHandler;
        processor.ProcessErrorAsync += ProcessErrorHandler;

        // Start the processing
        await processor.StartProcessingAsync();

        // Wait for 30 seconds for the events to be processed
        await Task.Delay(TimeSpan.FromSeconds(30));

        // Stop the processing
        await processor.StopProcessingAsync();
    }