将单个文件上载到Blob Storage Azure

本文关键字：Blob Storage Azure 上载单个文件 | 更新日期: 2023-09-27 18:30:12

如何用C#上传文件？我需要从对话窗口上传一个文件。

using Microsoft.WindowsAzure.Storage;
using Microsoft.WindowsAzure.Storage.Auth;
using Microsoft.WindowsAzure.Storage.Blob;    
// Retrieve storage account from connection string.
    CloudStorageAccount storageAccount = CloudStorageAccount.Parse("StorageKey");
// Create the blob client.
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
// Retrieve reference to a previously created container.
CloudBlobContainer container = blobClient.GetContainerReference("mycontainer");
// Retrieve reference to a blob named "myblob".
CloudBlockBlob blockBlob = container.GetBlockBlobReference("myblob");
// Create or overwrite the "myblob" blob with contents from a local file.
using (var fileStream = System.IO.File.OpenRead(@"path'myfile"))
{
    blockBlob.UploadFromStream(fileStream);
}

请参阅此处了解所需的SDK和参考

我认为这正是您所需要的

由于WindowsAzure。存储是遗留的。使用Microsoft.Azure.Storage.*，我们可以使用以下代码上传

  static async Task CreateBlob()
    {
        
        BlobServiceClient blobServiceClient = new BlobServiceClient(storageconnstring);
        
        BlobContainerClient containerClient = blobServiceClient.GetBlobContainerClient(containerName);
        
        BlobClient blobClient = containerClient.GetBlobClient(filename);
        
        using FileStream uploadFileStream = File.OpenRead(filepath);
        
        await blobClient.UploadAsync(uploadFileStream, true);
        uploadFileStream.Close();
    }

下面的代码片段是执行文件上传的最简单形式。我在这段代码中又添加了几行，以便检测上传的文件类型并检查容器的Existance。

注意：-您需要先添加以下NuGet包。

Microsoft.AspNetCore.StaticFiles
Microsoft.Azure.Storage.Blob

Microsoft.Extensions.配置

static void Main(string[] args)
{
    Console.WriteLine("Hello World!");
    string connstring = "DefaultEndpointsProtocol=https;AccountName=storageaccountnewne9d7b;AccountKey=3sUU8J5pQQ+6YYIi+b5jo+BiSb5XPt027Rve6N5QP9iPEhMXZAbzUfsuW7QDWi1gSPecsPFpC6AzmA9jwPYs6g==;EndpointSuffix=core.windows.net";
    string containername = "newturorial";
    string finlename = "TestUpload.docx";
    var fileBytes = System.IO.File.ReadAllBytes(@"C:'Users'Namal Wijekoon'Desktop'HardningSprint2LoadTest'" + finlename);
    var cloudstorageAccount = CloudStorageAccount.Parse(connstring);
    var cloudblobClient = cloudstorageAccount.CreateCloudBlobClient();
    var containerObject = cloudblobClient.GetContainerReference(containername);
    //check the container existance
    if (containerObject.CreateIfNotExistsAsync().Result)
    {
        containerObject.SetPermissionsAsync(new BlobContainerPermissions { PublicAccess = BlobContainerPublicAccessType.Blob });
    }
    var fileobject = containerObject.GetBlockBlobReference(finlename);
    //check the file type
    string file_type;
    var provider = new FileExtensionContentTypeProvider();
    if(!provider.TryGetContentType(finlename, out file_type))
    {
        file_type = "application/octet-stream";
    }
    fileobject.Properties.ContentType = file_type;
    fileobject.UploadFromByteArrayAsync(fileBytes, 0 , fileBytes.Length);
    string fileuploadURI = fileobject.Uri.AbsoluteUri;
    Console.WriteLine("File has be uploaded successfully.");
    Console.WriteLine("The URL of the Uploaded file is : - 'n" + fileuploadURI);
}

我们可以使用BackgroundUploader类，然后我们需要提供StorageFile对象和Uri：必需的命名空间：

using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Networking.BackgroundTransfer;
using Windows.Storage.Pickers;
using Windows.Storage;

过程如下：Uri是使用通过UI输入字段提供的字符串值定义的，当最终用户通过PickSingleFileAsync操作提供的UI选择文件时，将返回由StorageFile对象表示的所需上传文件

Uri uri = new Uri(serverAddressField.Text.Trim());
FileOpenPicker picker = new FileOpenPicker();
picker.FileTypeFilter.Add("*");
StorageFile file = await picker.PickSingleFileAsync();

然后：

BackgroundUploader uploader = new BackgroundUploader();
uploader.SetRequestHeader("Filename", file.Name);
UploadOperation upload = uploader.CreateUpload(uri, file);
// Attach progress and completion handlers.
await HandleUploadAsync(upload, true);

这就是全部

这是完整的方法

 [HttpPost]
        public ActionResult Index(Doctor doct, HttpPostedFileBase photo)
        {
            try
            {
                if (photo != null && photo.ContentLength > 0)
                {
                    // extract only the fielname
                    var fileName = Path.GetFileName(photo.FileName);
                    doct.Image = fileName.ToString();
                    CloudStorageAccount cloudStorageAccount = DoctorController.GetConnectionString();
                    CloudBlobClient cloudBlobClient = cloudStorageAccount.CreateCloudBlobClient();
                    CloudBlobContainer cloudBlobContainer = cloudBlobClient.GetContainerReference("images");

                    string imageName = Guid.NewGuid().ToString() + "-" +Path.GetExtension(photo.FileName); 
                    CloudBlockBlob BlockBlob = cloudBlobContainer.GetBlockBlobReference(imageName);
                    BlockBlob.Properties.ContentType = photo.ContentType;
                    BlockBlob.UploadFromStreamAsync(photo.InputStream);
                    string imageFullPath = BlockBlob.Uri.ToString();
                    var memoryStream = new MemoryStream();

                    photo.InputStream.CopyTo(memoryStream);
                    memoryStream.ToArray();

                    memoryStream.Seek(0, SeekOrigin.Begin);
                    using (var fs = photo.InputStream)
                    {
                        BlockBlob.UploadFromStreamAsync(memoryStream);
                    }
                }
            }
            catch (Exception ex)
            {
            }

            return View();
        }

其中getconnectionstring方法是这样的

 static string accountname = ConfigurationManager.AppSettings["accountName"];
      static  string key = ConfigurationManager.AppSettings["key"];

            public static CloudStorageAccount GetConnectionString()
            {
                string connectionString = string.Format("DefaultEndpointsProtocol=https;AccountName={0};AccountKey={1}", accountname, key);
                return CloudStorageAccount.Parse(connectionString);
            }

完成Web API控制器以上载单个或多个文件。NET Framework 4.8

安装NuGet包，Azure.Storage.BBlob

using Microsoft.WindowsAzure.Storage;
using Microsoft.WindowsAzure.Storage.Blob;
using System;
using System.Configuration;
using System.Web;
using System.Web.Http;
namespace api.azure.Controllers
{
    public class FileController : ApiController
    {
        [HttpPost]
        [Route("api/BlobStorage/UploadFiles")]
        public IHttpActionResult UploadFiles()
        {
            string result = "";
            try
            {
                result = UploadFilesToBlob();
            }
            catch (Exception ex)
            {
                return Ok(ex.Message);
            }
            return Ok(result);
        }
        public string UploadFilesToBlob()
        {
            try
            {
                string storageConnectionString = ConfigurationManager.AppSettings["BlobStorageConnectionString"];
                CloudStorageAccount blobStorage = CloudStorageAccount.Parse(storageConnectionString);
                CloudBlobClient blobClient = blobStorage.CreateCloudBlobClient();
                if (HttpContext.Current.Request.Form["BlobContainerName"] != null)
                {
                    string blobContainerName = HttpContext.Current.Request.Form["BlobContainerName"].ToString();
                    CloudBlobContainer container = blobClient.GetContainerReference(blobContainerName);
                    container.CreateIfNotExists();
                    // Set public access level to the container.
                    container.SetPermissions(new BlobContainerPermissions()
                    {
                        PublicAccess = BlobContainerPublicAccessType.Container
                    });
                    string folderName = "";
                    if (HttpContext.Current.Request.Form["FolderNameToUploadFiles"] != null)
                    folderName = HttpContext.Current.Request.Form["FolderNameToUploadFiles"].ToString() + "/";
                    for (int i = 0; i < HttpContext.Current.Request.Files.Count; i++)
                    {
                        var httpPostedFile = HttpContext.Current.Request.Files[i];
                        if (httpPostedFile != null)
                        {
                            string blobName = folderName + httpPostedFile.FileName;
                            CloudBlockBlob blob = container.GetBlockBlobReference(blobName);
                            blob.UploadFromStream(httpPostedFile.InputStream);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return "# of file(s) sent to upload: " + HttpContext.Current.Request.Files.Count.ToString();
        }
    }
}