如何使用 Azure Functions 删除 blob?

问题描述

我正在创建一个 Azure 函数，该函数在图像上传或添加到特定 Azure 存储时触发，它执行以下操作:1.) 调整图像大小2.) 将图像放到正确的目录中(使用输出绑定)3.) 删除处理后添加到 Azure 存储的原始 blob 图像.

I am creating an Azure function that triggers when an image is uploaded or added to a particular Azure Storage, and it does the following: 1.) Resize the image 2.) Put the image to correct directory (using Output binding) 3.) Delete the original blob image that was added to Azure Storage after processing.

我已完成该过程中的步骤 1 和 2，但我发现几乎没有关于删除 Blob 或 API 的文档会公开 Azure 存储的方法.(使用 C#)

I am done with steps 1 and 2 in the process, but I'm finding less to no documentation about deleting a blob or an API that would expose methods for Azure Storage. (Using C#)

示例代码如下:

#r "System.Drawing"
using System;
using ImageResizer;
using System.Drawing;
using System.Drawing.Imaging;

public static void Run(Stream inputImage, string imageName, Stream resizedImage, TraceWriter log)
{
    // Log the file name and size
    log.Info($"C# Blob trigger function Processed blob
 Name:{imageName} 
 Size: {inputImage.Length} Bytes");

    // Manipulate the image
    var settings = new ImageResizer.ResizeSettings
    {
        MaxWidth = 400,
        Format = "png"
    };

    ImageResizer.ImageBuilder.Current.Build(inputImage, resizedImage, settings);

    // Delete the Raw Original Image Step
}

推荐答案

要删除一个blob，你需要

To delete a blob, you need to

var container = blobClient.GetContainerReference(containerName);
var blockBlob = container.GetBlockBlobReference(fileName);
return blockBlob.DeleteIfExists();

请确保在尝试此操作之前关闭所有流，以便不再使用该图像.

Make sure that your close all streams before you try this so the image is no longer in use.

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