Azure blob文件存储在没有任何物理文件夹结构的普通列表中,但我们可以创建虚拟文件夹,其中每个文件的文件夹路径都是其名称的一部分。
它带来了另一个问题,如何仅使用该文件夹的名称检索虚拟子文件夹中的所有文件列表?
答案 0 :(得分:29)
实际上,有一种更简单的方法,它可以在库本身中使用。如果查看CloudBlobContainer.ListBlobs
方法,它会接受两个参数:
useFlatBlobListing :将此值设置为true
将确保仅返回blob(包括该目录中的任何子文件夹内),而不是目录和blob。
var account = new CloudStorageAccount(new StorageCredentials(accountName, accountKey), true);
var blobClient = account.CreateCloudBlobClient();
var container = blobClient.GetContainerReference("blob-container-name");
var blobs = container.ListBlobs(prefix: "container-directory", useFlatBlobListing: true);
您将获得blobs
变量中“container-directory”中所有blob的列表。
答案 1 :(得分:11)
此静态类BlobHelper
将加载给定blob文件夹中所有blob文件的列表及其所有子文件夹。
就这样称呼它:
var blobs = BlobHelper.ListFolderBlobs("blob-container-name", "container-directory");
以下是完整的BlobHelper
代码:
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using Microsoft.WindowsAzure;
using Microsoft.WindowsAzure.Storage;
using Microsoft.WindowsAzure.Storage.Blob;
// Class to contain list of blob files info
public class BlobFileInfo {
public string FileName { get; set; }
public string BlobPath { get; set; }
public string BlobFilePath { get; set; }
public IListBlobItem Blob { get; set; }
}
public static class BlobHelper {
// Load blob container
public static CloudBlobContainer GetBlobContainer(string containerName) {
var storageAccount = CloudStorageAccount.Parse(CloudConfigurationManager.GetSetting("StorageConnectionString"));
var blobClient = storageAccount.CreateCloudBlobClient();
var container = blobClient.GetContainerReference(containerName);
return container;
}
// Get recursive list of files
public static IEnumerable<BlobFileInfo> ListFolderBlobs(string containerName, string directoryName) {
var blobContainer = GetBlobContainer(containerName);
var blobDirectory = blobContainer.GetDirectoryReference(directoryName);
var blobInfos = new List<BlobFileInfo>();
var blobs = blobDirectory.ListBlobs().ToList();
foreach (var blob in blobs) {
if (blob is CloudBlockBlob) {
var blobFileName = blob.Uri.Segments.Last().Replace("%20", " ");
var blobFilePath = blob.Uri.AbsolutePath.Replace(blob.Container.Uri.AbsolutePath + "/", "").Replace("%20", " ");
var blobPath = blobFilePath.Replace("/" + blobFileName, "");
blobInfos.Add(new BlobFileInfo {
FileName = blobFileName,
BlobPath = blobPath,
BlobFilePath = blobFilePath,
Blob = blob
});
}
if (blob is CloudBlobDirectory) {
var blobDir = blob.Uri.OriginalString.Replace(blob.Container.Uri.OriginalString + "/", "");
blobDir = blobDir.Remove(blobDir.Length - 1);
var subBlobs = ListFolderBlobs(containerName, blobDir);
blobInfos.AddRange(subBlobs);
}
}
return blobInfos;
}
}
答案 2 :(得分:0)
从Gaurav Mantri的回答中,这是一种以递归方式显示文件的简单方法。
public class UriNode
{
public Uri ThisUri { get; private set; }
public IEnumerable<UriNode> Children { get; private set; }
public UriNode(CloudBlobContainer container, Uri thisUri = null)
{
ThisUri = thisUri;
if (ThisUri == null)
{
Children = container.ListBlobs().Select(b => new UriNode(container, b.Uri));
return;
}
if (!new Regex(@"\/$").IsMatch(ThisUri.AbsolutePath)) return;
var prefix = string.Join("/", ThisUri.Segments.Skip(2).Take(ThisUri.Segments.Length - 2));
Children = container.ListBlobs(prefix).Select(b => new UriNode(container, b.Uri));
}
}
用法:
new UriNode(container);