為什么將Blob創建為空？

Question

為什么創建的Blob沒有任何內容？

我有一個輸出綁定集，用於在下面創建blob：

public static class OnSchedulingToMMMQueueTriggered
{
    [FunctionName("OnSchedulingToMMMQueueTriggered")]
    public static void Run(
        [QueueTrigger("httpqueue", Connection = "OnSchedulingToMMMQueueTriggered:SourceQueueConnection")] MyPayload myQueueItem,
        [Blob("processed/{Payload}", FileAccess.Write, Connection = "OnSchedulingToMMMQueueTriggered:ProcessedPayloadsConnectionString")] Stream processedPayload,
        ILogger log)
    {
        log.LogInformation($"C# Queue trigger function processed: {myQueueItem.Payload}");
        processedPayload = StreamGenerator.GenerateStreamFromString(myQueueItem.Payload);
    }
}

它創建了一個Blob，並為它分配了正確的命名，並帶有processed/{Payload} ； 但是，當我檢查一下斑點內的內容時，它是空的！

我假設這不起作用：

        processedPayload = StreamGenerator.GenerateStreamFromString(myQueueItem.Payload);

我要遵循的示例是此示例，從這里開始 ：

[FunctionName("ResizeImage")]
    public static void Run(
    [BlobTrigger("sample-images/{name}")] Stream image,
    [Blob("sample-images-sm/{name}", FileAccess.Write)] Stream imageSmall, //output blob
    [Blob("sample-images-md/{name}", FileAccess.Write)] Stream imageMedium)
    {
         //your code here
    }

為什么將Blob創建為空？

這是我的StreamGenerator實現：

public static class StreamGenerator
{
    public static Stream GenerateStreamFromString(string s)
    {
        var stream = new MemoryStream();
        var writer = new StreamWriter(stream);
        writer.Write(s);
        writer.Flush();
        stream.Position = 0;
        return stream;
    }
}

Answer 1

似乎您的代碼將生成的流分配給本地var processedPayload

你可能想要

StreamGenerator.GenerateStreamFromString(myQueueItem.Payload).CopyTo(processedPayload)