Azure Functions：事件驱动的无服务器代码

json { "bindings": [ { "name": "myBlob", "type": "blobTrigger", "direction": "in", "path": "images/{name}", "connection": "AzureWebJobsStorage" }, { "name": "outputTable", "type": "table", "direction": "out", "tableName": "imageMetadata", "connection": "AzureWebJobsStorage" } ] }

#### 步骤 3：编写函数代码
以下 C# 函数接收触发它的 blob 流，并构造一条日志记录写入表存储：

```csharp
using System;
using System.IO;
using Microsoft.Azure.WebJobs;
using Microsoft.Extensions.Logging;

public static class ImageLogger
{
    public class ImageLog
    {
        public string PartitionKey { get; set; }
        public string RowKey { get; set; }
        public string FileName { get; set; }
        public long Size { get; set; }
        public DateTime Timestamp { get; set; }
    }

    [FunctionName("ImageLogger")]
    public static void Run(
        [BlobTrigger("images/{name}", Connection = "AzureWebJobsStorage")] Stream myBlob,
        [Table("imageMetadata", Connection = "AzureWebJobsStorage")] out ImageLog outputTable,
        string name,
        ILogger log)
    {
        log.LogInformation($"处理 Blob\n 名称：{name} \n 大小：{myBlob.Length} 字节");

        outputTable = new ImageLog
        {
            PartitionKey = "Images",
            RowKey = Guid.NewGuid().ToString(),
            FileName = name,
            Size = myBlob.Length,
            Timestamp = DateTime.UtcNow
        };
    }
}