How can I to Upload a file with C# ? I need to upload a file from a dialogWindow.
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);
}
see here about needed SDK and references
i think it's what you need
Since WindowsAzure.Storage is legacy. With Microsoft.Azure.Storage.* we can use the following code to upload
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();
}
The following code snippet is the simplest form of performing the file uploading.
I have added a few more lines to this code, in order to detect the uploading file type and check the container exeistance.
Note:- you need to add the following NuGet packages first.
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);
}
we can use BackgroundUploader class ,Then we need to provide StorageFile object and a Uri:
Required Namespaces:
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;
The process is Like This :
Uri is defined using a string value provided via a UI input field, and the desired file for upload, represented by a StorageFile object, is returned when the end-user has selected a file through the UI provided by the PickSingleFileAsync operation
Uri uri = new Uri(serverAddressField.Text.Trim());
FileOpenPicker picker = new FileOpenPicker();
picker.FileTypeFilter.Add("*");
StorageFile file = await picker.PickSingleFileAsync();
and Then:
BackgroundUploader uploader = new BackgroundUploader();
uploader.SetRequestHeader("Filename", file.Name);
UploadOperation upload = uploader.CreateUpload(uri, file);
// Attach progress and completion handlers.
await HandleUploadAsync(upload, true);
Thats All
Here is the complete method.
[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();
}
where the getconnectionstring method is this.
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);
}
Complete Web API Controller to upload single or multiple files. .NET Framework 4.8
Install NuGet package, Azure.Storage.Blob
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();
}
}
}
Related
I am trying to update a JSON file which is located in azure blob storage. when the program does the put call the saved file looks like this:
Zona de especial protecci\u00F3n
the accents and other characters are the matter, but that only happens when I download the file from the azure UI interface if I do a get from postman, that does not happen. this is my code:
SemanticDictionaryContent semanticDictionaryContent = new SemanticDictionaryContent()
{
Name = entity.Id + JSON_EXTENSION,
Content = BinaryData.FromObjectAsJson(entity)
};
Create a storage account in azure.
Create a container in azure.
Uploaded a Json file to a container using the below code.
I have used the below approach in Uploading / downloading / editing the Json file.
public static bool Upload()
{
try
{
var containerName = "mycontainer";
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(ConnectionSting);
CloudBlobClient client = storageAccount.CreateCloudBlobClient();
CloudBlobContainer container = client.GetContainerReference(containerName);
var isCreated = container.CreateIfNotExists();
container.SetPermissionsAsync(new BlobContainerPermissions { PublicAccess = BlobContainerPublicAccessType.Blob });
using (FileStream fileStream = File.Open(#"C:\Tools\local.settings.json", FileMode.Open))
{
using (MemoryStream memoryStream = new MemoryStream())
{
memoryStream.Position = 0;
fileStream.CopyTo(memoryStream);
var fileName = "local.settings.json";
CloudBlockBlob blob = container.GetBlockBlobReference(fileName);
string mimeType = "application/unknown";
string ext = (fileName.Contains(".")) ? System.IO.Path.GetExtension(fileName).ToLower() : "." + fileName;
Microsoft.Win32.RegistryKey regKey = Microsoft.Win32.Registry.ClassesRoot.OpenSubKey(ext);
if (regKey != null && regKey.GetValue("Content Type") != null) mimeType = regKey.GetValue("Content Type").ToString();
memoryStream.ToArray();
memoryStream.Seek(0, SeekOrigin.Begin);
blob.Properties.ContentType = mimeType;
blob.UploadFromStream(memoryStream);
}
}
return true;
}
catch (Exception ex)
{
throw;
}
}
Uploaded Json file
Updated the Json file in azure and uploaded it using the below code.
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(ConnectionSting);
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
CloudBlobContainer container = blobClient.GetContainerReference("mycontainer");
CloudBlockBlob jsonBlob = container.GetBlockBlobReference("local.settings.json");
string jsonText = jsonBlob.DownloadText();
dynamic jsonData = JsonConvert.DeserializeObject(jsonText);
jsonData.property1 = "Property1";
jsonData.property2 = "Property2";
jsonBlob.UploadText(JsonConvert.SerializeObject(jsonData));
And downloaded the Json file from azure manually and do not find any special characters.
can I append Images byte... ? I tried that but not works.. its increase the size but not reflect images.. its always return first image that I append first.. So Please help how can I append images ? json/text files are working fine but I m stuck on append image..
So,Please Help how can i do that..
Here is my code
CloudAppendBlob cloudAppendBlob = cloudBlobContainer.GetAppendBlobReference(fileName);
bool exist = await cloudAppendBlob.ExistsAsync();
if(!exist)
{
await cloudAppendBlob.CreateOrReplaceAsync();
}
cloudAppendBlob.Properties.ContentType = fileType;
stream.Position = 0;
await cloudAppendBlob.AppendBlockAsync(stream);
You can not append images with the same name. If you do that, it will replace the image file with the same name. If you upload another image then it would create a new image as per the uploaded one. Try the code below.
private CloudBlobContainer blobContainer;
public AzureBlobHelper()
{
try
{
// Get azure table storage connection string.
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(CloudConfigurationManager.GetSetting("StorageConnectionString"));
CloudBlobClient cloudBlobClient = storageAccount.CreateCloudBlobClient();
blobContainer = cloudBlobClient.GetContainerReference(CloudConfigurationManager.GetSetting("StorageContainer"));
// Create the container and set the permission
if (blobContainer.CreateIfNotExists())
{
blobContainer.SetPermissions(
new BlobContainerPermissions
{
PublicAccess = BlobContainerPublicAccessType.Blob
}
);
}
}
catch (Exception ExceptionObj)
{
// throw ExceptionObj;
}
}
public string UploadFile(string FileName, string LocalPath, string AzureBlobPath, string ContentType = "")
{
string AbsoluteUri;
try
{
CloudBlockBlob blockBlob;
// Create a block blob
blockBlob = blobContainer.GetBlockBlobReference(AzureBlobPath + FileName);
// Set the object's content type
blockBlob.Properties.ContentType = ContentType;
blockBlob.UploadFromFile(LocalPath);
// get file uri
AbsoluteUri = blockBlob.Uri.AbsoluteUri;
}
catch (Exception ExceptionObj)
{
throw ExceptionObj;
}
return AbsoluteUri;
}
Below is the method where I am reading a csv file from an azure blob container and later calling a function to copy the contents in a tabular storage.
Now my requirement has bit changed and now .csv file will be compressed to .gz file in the blob container. I would like to know, how can I modify the below code so that I can read .gz file , decompress it and then pass the contents as I am already passing
public async Task<string> ReadStream(string BlobcontainerName, string fileName, string connectionString)
{
var contents = await DownloadBlob(BlobcontainerName, fileName, connectionString);
string data = Encoding.UTF8.GetString(contents.ToArray());
return data;
}
foreach (var files in recFiles)// recFiles are list of CSV files
{
string data = await ReadStream(containerName, files.Name, connectionString);}
public async Task<MemoryStream> DownloadBlob(string containerName, string fileName, string connectionString)
{
MemoryStream memoryStream = new MemoryStream();
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(connectionString);
CloudBlobClient serviceClient = storageAccount.CreateCloudBlobClient();
CloudBlobContainer container = serviceClient.GetContainerReference(containerName);
CloudBlockBlob blob = container.GetBlockBlobReference(fileName);
if (blob.Exists())
{
using (memoryStream = new MemoryStream())
{
await blob.DownloadToStreamAsync(memoryStream);
}
}
return memoryStream;
}
Try this code:
public async Task<MemoryStream> DownloadBlob(string containerName, string fileName, string connectionString)
{
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(connectionString);
CloudBlobClient serviceClient = storageAccount.CreateCloudBlobClient();
CloudBlobContainer container = serviceClient.GetContainerReference(containerName);
CloudBlockBlob blob = container.GetBlockBlobReference(fileName);
var memoryStream = new MemoryStream();
if (blob.Exists())
{
using (var gZipStream = new GZipStream(memoryStream, CompressionMode.Decompress))
{
await blob.DownloadToStreamAsync(gZipStream);
}
}
return memoryStream;
}
I am uploading an excel file to azure storage container. When the file gets uploaded, and I try to download it back from the portal and open it, the open fails because the format of the file and extension do not match. Also, there is no size in the size column corresponding to the file. I cannot spot the error. The code is in asp.net core 3.1 with c#.
Here is my code
CloudStorageAccount cloudStorageAccount = CloudStorageAccount.Parse(connectionString); // to the azure account
CloudBlobClient cloudBlobClient = cloudStorageAccount.CreateCloudBlobClient();
CloudBlobContainer cloudBlobContainer = cloudBlobClient.GetContainerReference(containerName); // container in which the file will be uploaded
blob = cloudBlobContainer.GetBlockBlobReference(f); // f is file name
await blob.UploadFromStreamAsync(s); // this is a memory stream
blob.Properties.ContentType = fileType;
According to my test, we can use the following code to upload excel file to Azure blob storage
Install SDK
Install-Package Microsoft.Azure.Storage.Blob -Version 11.1.1
Install-Package Microsoft.AspNetCore.StaticFiles -Version 2.2.0
My excel file(.xlsx)
Code
static async Task Main(string[] args)
{
var filepath = #"D:\test.xlsx";
var storageAccount = CloudStorageAccount.Parse("<connection string>");
var cloudBlobClient = storageAccount.CreateCloudBlobClient();
var cloudBlobContainer = cloudBlobClient.GetContainerReference("test1");
var blob = cloudBlobContainer.GetBlockBlobReference(Path.GetFileName(filepath));
blob.Properties.ContentType = Get(Path.GetFileName(filepath));
using (var stream = File.OpenRead(filepath))
{
await blob.UploadFromStreamAsync(stream);
}
//download file
filepath = #"D:\test\" + blob.Name;
using (var stream = File.OpenWrite(filepath))
{
await blob.DownloadToStreamAsync(stream);
}
}
// get the file content type
static string Get(string fileName)
{
var provider = new FileExtensionContentTypeProvider();
string contentType;
if (!provider.TryGetContentType(fileName, out contentType))
{
contentType = "application/octet-stream";
}
return contentType;
}
I have zipped a file and upload to a blob in azure , but I am unable to download it after unzipping it. I have tried the below code but it is throwing error:
public FileStream Download(string strPath)
{
Stream fs = GetFile(strPath);
using (ZipArchive zip = new ZipArchive(fs))
{
var entry = zip.Entries.First();
var memoryStream = entry.Open();
string filename = "Report_" + GetUploadTime();
using (var fileStream = new FileStream(filename,
FileMode.CreateNew,
FileAccess.ReadWrite))
{
memoryStream.CopyTo(fileStream); // fileStream is not populated
return fileStream;
}
}
}
System.UnauthorizedAccessException occurred in mscorlib.dll but was not handled in user code, I do not want to create any folder or keep it anywhere just unzip and download how to do it.
public Stream GetFile(string strPath)
{
try
{
var filename = Path.GetFileName(strPath);
string account = ConfigurationManager.AppSettings["BlobContainer"];
string key = ConfigurationManager.AppSettings["BlobKey"];
string connectionString =
string.Format("DefaultEndpointsProtocol=https;AccountName={0};AccountKey={1}",
account, key);
CloudStorageAccount storageAccount =
CloudStorageAccount.Parse(connectionString);
var blobClient = storageAccount.CreateCloudBlobClient();
CloudBlobContainer container = blobClient.GetContainerReference("reportportalblob");
CloudBlockBlob blob = container.GetBlockBlobReference(filename);
Stream blobStream = blob.OpenRead();
return blobStream;
}
catch (Exception)
{
// download failed
// handle exception
throw;
}
}
I have search for some code but I am not getting anything, please help.
We could get the unzip stream with following code.
public MemoryStream GetFile(string strPath)
{
try
{
var filename = Path.GetFileName(strPath);
string account = ConfigurationManager.AppSettings["accountName"];
string key = ConfigurationManager.AppSettings["accountKey"];
string containerName = "test";
string connectionString =$"DefaultEndpointsProtocol=https;AccountName={account};AccountKey={key}";
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(connectionString);
var blobClient = storageAccount.CreateCloudBlobClient();
CloudBlobContainer container = blobClient.GetContainerReference(containerName);
CloudBlockBlob blob = container.GetBlockBlobReference(filename);
MemoryStream memory = new MemoryStream();
blob.DownloadToStream(memory);
var zipArchive = new ZipArchive(memory, ZipArchiveMode.Read, true);
var entry = zipArchive.Entries.First();
if (entry != null)
{
var stream = entry.Open();
memory = new MemoryStream();
stream.CopyTo(memory);
memory.Position = 0;
return memory;
}
return null;
}
catch (Exception)
{
// download failed
// handle exception
throw;
}
}
If we want to down to file, then we could use File.WriteAllBytes(strPath,memory.ToArray()); or fileStream.Write(memory.ToArray(),0,memory.ToArray().Length-1);
public void Download(string strPath)
{
var memory = GetFile(strPath);
string filename = "Report_" + DateTime.Now;
var fileStream = new FileStream(filename,
FileMode.CreateNew,
FileAccess.ReadWrite);
// File.WriteAllBytes(strPath,memory.ToArray());
fileStream.Write(memory.ToArray(),0,memory.ToArray().Length-1);
}