为什么将Blob创建为空？

Question

为什么创建的Blob没有任何内容？

我有一个输出绑定集，用于在下面创建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);
    }
}

它创建了一个Blob，并为它分配了正确的命名，并带有processed/{Payload} ； 但是，当我检查一下斑点内的内容时，它是空的！

我假设这不起作用：

        processedPayload = StreamGenerator.GenerateStreamFromString(myQueueItem.Payload);

我要遵循的示例是此示例，从这里开始 ：

[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
    }

为什么将Blob创建为空？

这是我的StreamGenerator实现：

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

似乎您的代码将生成的流分配给本地var processedPayload

你可能想要

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