CloudBlockBlob.UploadFromFile Method


Uploads a file to the Blob service. If the blob already exists, it will be overwritten.

public virtual void UploadFromFile (string path, Microsoft.Azure.Storage.AccessCondition accessCondition = default, Microsoft.Azure.Storage.Blob.BlobRequestOptions options = default, Microsoft.Azure.Storage.OperationContext operationContext = default);
abstract member UploadFromFile : string * Microsoft.Azure.Storage.AccessCondition * Microsoft.Azure.Storage.Blob.BlobRequestOptions * Microsoft.Azure.Storage.OperationContext -> unit
override this.UploadFromFile : string * Microsoft.Azure.Storage.AccessCondition * Microsoft.Azure.Storage.Blob.BlobRequestOptions * Microsoft.Azure.Storage.OperationContext -> unit
Public Overridable Sub UploadFromFile (path As String, Optional accessCondition As AccessCondition = Nothing, Optional options As BlobRequestOptions = Nothing, Optional operationContext As OperationContext = Nothing)



A string containing the file path providing the blob content.


An AccessCondition object that represents the condition that must be met in order for the request to proceed.


A BlobRequestOptions object that specifies additional options for the request. If null, default options are applied to the request.


An OperationContext object that represents the context for the current operation.




// This is one common way of creating a CloudStorageAccount object. You can get 
// your Storage Account Name and Key from the Azure Portal.
StorageCredentials credentials = new StorageCredentials(accountName, accountKey);
CloudStorageAccount storageAccount = new CloudStorageAccount(credentials, useHttps: true);

// Another common way to create a CloudStorageAccount object is to use a connection string:
// CloudStorageAccount storageAccount = CloudStorageAccount.Parse(connectionString);

CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();

// This call creates a local CloudBlobContainer object, but does not make a network call
// to the Azure Storage Service. The container on the service that this object represents may
// or may not exist at this point. If it does exist, the properties will not yet have been
// popluated on this object.
CloudBlobContainer blobContainer = blobClient.GetContainerReference(containerName);

// This makes an actual service call to the Azure Storage service. Unless this call fails,
// the container will have been created.

// This also does not make a service call, it only creates a local object.
CloudBlockBlob blob = blobContainer.GetBlockBlobReference(blobName);

// This transfers data in the file to the blob on the service.

Applies to