Question

如何使用C＃上传文件？我需要从dialogWindow上传文件。

Answer 1

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here了解所需的SDK和参考资料

我认为这就是你需要的东西

Answer 2

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;

这个过程是这样的： 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对象表示的上载所需文件

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);

多数人

Answer 3

因为 WindowsAzure.Storage 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();
    }

Answer 4

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();
        }

getconnectionstring方法就是这样。

 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);
            }

Answer 5

以下代码片段是执行文件上传的最简单形式。我在此代码中添加了更多行，以检测上传文件类型并检查容器是否存在。

注意：- 您需要先添加以下 NuGet 包。

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

Microsoft.Extensions.Configuration

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);
}

将单个文件上载到Blob Storage Azure

5 个答案: