CloudBlob.ExistsAsync Method
Definition
Important
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Overloads
| ExistsAsync() |
Initiates an asynchronous operation to check existence of the blob. |
| ExistsAsync(CancellationToken) |
Initiates an asynchronous operation to check existence of the blob. |
| ExistsAsync(BlobRequestOptions, OperationContext) |
Initiates an asynchronous operation to check existence of the blob. |
| ExistsAsync(BlobRequestOptions, OperationContext, CancellationToken) |
Initiates an asynchronous operation to check existence of the blob. |
| ExistsAsync(Boolean, BlobRequestOptions, OperationContext, CancellationToken) |
Initiates an asynchronous operation to check existence of the blob. |
ExistsAsync()
Initiates an asynchronous operation to check existence of the blob.
[Microsoft.Azure.Storage.DoesServiceRequest]
public virtual System.Threading.Tasks.Task<bool> ExistsAsync ();[<Microsoft.Azure.Storage.DoesServiceRequest>]
abstract member ExistsAsync : unit -> System.Threading.Tasks.Task<bool>
override this.ExistsAsync : unit -> System.Threading.Tasks.Task<bool>Public Overridable Function ExistsAsync () As Task(Of Boolean)Returns
A Task<TResult> object of type bool that represents the asynchronous operation.
- Attributes
Applies to
ExistsAsync(CancellationToken)
Initiates an asynchronous operation to check existence of the blob.
[Microsoft.Azure.Storage.DoesServiceRequest]
public virtual System.Threading.Tasks.Task<bool> ExistsAsync (System.Threading.CancellationToken cancellationToken);[<Microsoft.Azure.Storage.DoesServiceRequest>]
abstract member ExistsAsync : System.Threading.CancellationToken -> System.Threading.Tasks.Task<bool>
override this.ExistsAsync : System.Threading.CancellationToken -> System.Threading.Tasks.Task<bool>Public Overridable Function ExistsAsync (cancellationToken As CancellationToken) As Task(Of Boolean)Parameters
- cancellationToken
- CancellationToken
A CancellationToken to observe while waiting for a task to complete.
Returns
A Task<TResult> object of type bool that represents the asynchronous operation.
- Attributes
Applies to
ExistsAsync(BlobRequestOptions, OperationContext)
Initiates an asynchronous operation to check existence of the blob.
[Microsoft.Azure.Storage.DoesServiceRequest]
public virtual System.Threading.Tasks.Task<bool> ExistsAsync (Microsoft.Azure.Storage.Blob.BlobRequestOptions options, Microsoft.Azure.Storage.OperationContext operationContext);[<Microsoft.Azure.Storage.DoesServiceRequest>]
abstract member ExistsAsync : Microsoft.Azure.Storage.Blob.BlobRequestOptions * Microsoft.Azure.Storage.OperationContext -> System.Threading.Tasks.Task<bool>
override this.ExistsAsync : Microsoft.Azure.Storage.Blob.BlobRequestOptions * Microsoft.Azure.Storage.OperationContext -> System.Threading.Tasks.Task<bool>Public Overridable Function ExistsAsync (options As BlobRequestOptions, operationContext As OperationContext) As Task(Of Boolean)Parameters
- options
- BlobRequestOptions
A BlobRequestOptions object that specifies additional options for the request.
- operationContext
- OperationContext
An OperationContext object that represents the context for the current operation.
Returns
A Task<TResult> object of type bool that represents the asynchronous operation.
- Attributes
Applies to
ExistsAsync(BlobRequestOptions, OperationContext, CancellationToken)
Initiates an asynchronous operation to check existence of the blob.
[Microsoft.Azure.Storage.DoesServiceRequest]
public virtual System.Threading.Tasks.Task<bool> ExistsAsync (Microsoft.Azure.Storage.Blob.BlobRequestOptions options, Microsoft.Azure.Storage.OperationContext operationContext, System.Threading.CancellationToken cancellationToken);[<Microsoft.Azure.Storage.DoesServiceRequest>]
abstract member ExistsAsync : Microsoft.Azure.Storage.Blob.BlobRequestOptions * Microsoft.Azure.Storage.OperationContext * System.Threading.CancellationToken -> System.Threading.Tasks.Task<bool>
override this.ExistsAsync : Microsoft.Azure.Storage.Blob.BlobRequestOptions * Microsoft.Azure.Storage.OperationContext * System.Threading.CancellationToken -> System.Threading.Tasks.Task<bool>Public Overridable Function ExistsAsync (options As BlobRequestOptions, operationContext As OperationContext, cancellationToken As CancellationToken) As Task(Of Boolean)Parameters
- options
- BlobRequestOptions
A BlobRequestOptions object that specifies additional options for the request.
- operationContext
- OperationContext
An OperationContext object that represents the context for the current operation.
- cancellationToken
- CancellationToken
A CancellationToken to observe while waiting for a task to complete.
Returns
A Task<TResult> object of type bool that represents the asynchronous operation.
- Attributes
Applies to
ExistsAsync(Boolean, BlobRequestOptions, OperationContext, CancellationToken)
Initiates an asynchronous operation to check existence of the blob.
[Microsoft.Azure.Storage.DoesServiceRequest]
public virtual System.Threading.Tasks.Task<bool> ExistsAsync (bool primaryOnly, Microsoft.Azure.Storage.Blob.BlobRequestOptions options, Microsoft.Azure.Storage.OperationContext operationContext, System.Threading.CancellationToken cancellationToken);[<Microsoft.Azure.Storage.DoesServiceRequest>]
abstract member ExistsAsync : bool * Microsoft.Azure.Storage.Blob.BlobRequestOptions * Microsoft.Azure.Storage.OperationContext * System.Threading.CancellationToken -> System.Threading.Tasks.Task<bool>
override this.ExistsAsync : bool * Microsoft.Azure.Storage.Blob.BlobRequestOptions * Microsoft.Azure.Storage.OperationContext * System.Threading.CancellationToken -> System.Threading.Tasks.Task<bool>Public Overridable Function ExistsAsync (primaryOnly As Boolean, options As BlobRequestOptions, operationContext As OperationContext, cancellationToken As CancellationToken) As Task(Of Boolean)Parameters
- primaryOnly
- Boolean
If true, the command will be executed against the primary location.
- options
- BlobRequestOptions
A BlobRequestOptions object that specifies additional options for the request.
- operationContext
- OperationContext
An OperationContext object that represents the context for the current operation.
- cancellationToken
- CancellationToken
A CancellationToken to observe while waiting for a task to complete.
Returns
A Task<TResult> object of type bool that represents the asynchronous operation.
- Attributes
Applies to
Azure SDK for .NET