WebClient.UploadValuesTaskAsync Method

Definition

Namespace:

System.Net

Assembly:

System.Net.WebClient.dll

Uploads the specified name/value collection to the resource identified by the specified URI as an asynchronous operation using a task object. These methods do not block the calling thread.

Overloads

UploadValuesTaskAsync(String, String, NameValueCollection)	Uploads the specified name/value collection to the resource identified by the specified URI as an asynchronous operation using a task object.
UploadValuesTaskAsync(String, NameValueCollection)	Uploads the specified name/value collection to the resource identified by the specified URI as an asynchronous operation using a task object.
UploadValuesTaskAsync(Uri, NameValueCollection)	Uploads the specified name/value collection to the resource identified by the specified URI as an asynchronous operation using a task object.
UploadValuesTaskAsync(Uri, String, NameValueCollection)	Uploads the specified name/value collection to the resource identified by the specified URI as an asynchronous operation using a task object.

UploadValuesTaskAsync(String, String, NameValueCollection)

Source:

WebClient.cs

Uploads the specified name/value collection to the resource identified by the specified URI as an asynchronous operation using a task object.

public:
 System::Threading::Tasks::Task<cli::array <System::Byte> ^> ^ UploadValuesTaskAsync(System::String ^ address, System::String ^ method, System::Collections::Specialized::NameValueCollection ^ data);

public System.Threading.Tasks.Task<byte[]> UploadValuesTaskAsync (string address, string? method, System.Collections.Specialized.NameValueCollection data);

member this.UploadValuesTaskAsync : string * string * System.Collections.Specialized.NameValueCollection -> System.Threading.Tasks.Task<byte[]>

Public Function UploadValuesTaskAsync (address As String, method As String, data As NameValueCollection) As Task(Of Byte())

Parameters

address

String

The URI of the resource to receive the collection.

method

String

The HTTP method used to send the collection to the resource. If null, the default is POST for http and STOR for ftp.

data

NameValueCollection

The NameValueCollection to send to the resource.

Returns

Task<Byte[]>

The task object representing the asynchronous operation. The Result property on the task object returns a Byte array containing the response sent by the server.

Exceptions

ArgumentNullException

The address parameter is null.

-or-

The data parameter is null.

WebException

The URI formed by combining BaseAddress, and address is invalid.

-or-

method cannot be used to send content.

-or-

There was no response from the server hosting the resource.

-or-

An error occurred while opening the stream.

-or-

The Content-type header is not null or "application/x-www-form-urlencoded".

Remarks

Caution

WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete, and you shouldn't use them for new development. Use HttpClient instead.

This operation will not block. The returned Task<TResult> object will complete after the name/value collection has been uploaded to the resource. The name/value collection is sent asynchronously using thread resources that are automatically allocated from the thread pool.

In .NET Framework and .NET Core 1.0, you can cancel asynchronous operations that have not completed by calling the CancelAsync method.

If the underlying request is not understood by the server, the underlying protocol classes determine what occurs. Typically, a WebException is thrown with the Status property set to indicate the error.

If the Content-type header is null, this method sets it to "application/x-www-form-urlencoded".

If the BaseAddress property is not an empty string ("") and address does not contain an absolute URI, address must be a relative URI that is combined with BaseAddress to form the absolute URI of the requested data. If the QueryString property is not an empty string, it is appended to address.

This method uses the STOR command to upload an FTP resource. For an HTTP resource, the POST method is used.

Note

This member outputs trace information when you enable network tracing in your application. For more information, see Network Tracing in .NET Framework.

UploadValuesTaskAsync(String, NameValueCollection)

Source:

WebClient.cs

Uploads the specified name/value collection to the resource identified by the specified URI as an asynchronous operation using a task object.

public:
 System::Threading::Tasks::Task<cli::array <System::Byte> ^> ^ UploadValuesTaskAsync(System::String ^ address, System::Collections::Specialized::NameValueCollection ^ data);

public System.Threading.Tasks.Task<byte[]> UploadValuesTaskAsync (string address, System.Collections.Specialized.NameValueCollection data);

member this.UploadValuesTaskAsync : string * System.Collections.Specialized.NameValueCollection -> System.Threading.Tasks.Task<byte[]>

Public Function UploadValuesTaskAsync (address As String, data As NameValueCollection) As Task(Of Byte())

Parameters

address

String

The URI of the resource to receive the collection.

data

NameValueCollection

The NameValueCollection to send to the resource.

Returns

Task<Byte[]>

The task object representing the asynchronous operation. The Result property on the task object returns a Byte array containing the response sent by the server.

Exceptions

ArgumentNullException

The address parameter is null.

-or-

The data parameter is null.

WebException

The URI formed by combining BaseAddress, and address is invalid.

-or-

There was no response from the server hosting the resource.

-or-

An error occurred while opening the stream.

-or-

The Content-type header is not null or "application/x-www-form-urlencoded".

Remarks

Caution

WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete, and you shouldn't use them for new development. Use HttpClient instead.

This operation will not block. The returned Task<TResult> object will complete after the name/value collection has been uploaded to the resource. The name/value collection is sent asynchronously using thread resources that are automatically allocated from the thread pool.

In .NET Framework and .NET Core 1.0, you can cancel asynchronous operations that have not completed by calling the CancelAsync method.

If the underlying request is not understood by the server, the underlying protocol classes determine what occurs. Typically, a WebException is thrown with the Status property set to indicate the error.

If the Content-type header is null, this method sets it to "application/x-www-form-urlencoded".

If the BaseAddress property is not an empty string ("") and address does not contain an absolute URI, address must be a relative URI that is combined with BaseAddress to form the absolute URI of the requested data. If the QueryString property is not an empty string, it is appended to address.

This method uses the STOR command to upload an FTP resource. For an HTTP resource, the POST method is used.

Note

This member outputs trace information when you enable network tracing in your application. For more information, see Network Tracing in .NET Framework.

UploadValuesTaskAsync(Uri, NameValueCollection)

Source:

WebClient.cs

Uploads the specified name/value collection to the resource identified by the specified URI as an asynchronous operation using a task object.

public:
 System::Threading::Tasks::Task<cli::array <System::Byte> ^> ^ UploadValuesTaskAsync(Uri ^ address, System::Collections::Specialized::NameValueCollection ^ data);

public System.Threading.Tasks.Task<byte[]> UploadValuesTaskAsync (Uri address, System.Collections.Specialized.NameValueCollection data);

member this.UploadValuesTaskAsync : Uri * System.Collections.Specialized.NameValueCollection -> System.Threading.Tasks.Task<byte[]>

Public Function UploadValuesTaskAsync (address As Uri, data As NameValueCollection) As Task(Of Byte())

Parameters

address

Uri

The URI of the resource to receive the collection.

data

NameValueCollection

The NameValueCollection to send to the resource.

Returns

Task<Byte[]>

The task object representing the asynchronous operation. The Result property on the task object returns a Byte array containing the response sent by the server.

Exceptions

ArgumentNullException

The address parameter is null.

-or-

The data parameter is null.

WebException

The URI formed by combining BaseAddress, and address is invalid.

-or-

An error occurred while opening the stream.

-or-

There was no response from the server hosting the resource.

-or-

The Content-type header value is not null and is not application/x-www-form-urlencoded.

Remarks

Caution

WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete, and you shouldn't use them for new development. Use HttpClient instead.

This operation will not block. The returned Task<TResult> object will complete after the name/value collection has been uploaded to the resource. The name/value collection is sent asynchronously using thread resources that are automatically allocated from the thread pool.

In .NET Framework and .NET Core 1.0, you can cancel asynchronous operations that have not completed by calling the CancelAsync method.

If the underlying request is not understood by the server, the underlying protocol classes determine what occurs. Typically, a WebException is thrown with the Status property set to indicate the error.

If the Content-type header is null, this method sets it to "application/x-www-form-urlencoded".

If the BaseAddress property is not an empty string ("") and address does not contain an absolute URI, address must be a relative URI that is combined with BaseAddress to form the absolute URI of the requested data. If the QueryString property is not an empty string, it is appended to address.

This method uses the STOR command to upload an FTP resource. For an HTTP resource, the POST method is used.

Note

This member outputs trace information when you enable network tracing in your application. For more information, see Network Tracing in .NET Framework.

UploadValuesTaskAsync(Uri, String, NameValueCollection)

Source:

WebClient.cs

Uploads the specified name/value collection to the resource identified by the specified URI as an asynchronous operation using a task object.

public:
 System::Threading::Tasks::Task<cli::array <System::Byte> ^> ^ UploadValuesTaskAsync(Uri ^ address, System::String ^ method, System::Collections::Specialized::NameValueCollection ^ data);

public System.Threading.Tasks.Task<byte[]> UploadValuesTaskAsync (Uri address, string? method, System.Collections.Specialized.NameValueCollection data);

member this.UploadValuesTaskAsync : Uri * string * System.Collections.Specialized.NameValueCollection -> System.Threading.Tasks.Task<byte[]>

Public Function UploadValuesTaskAsync (address As Uri, method As String, data As NameValueCollection) As Task(Of Byte())

Parameters

address

Uri

The URI of the resource to receive the collection.

method

String

The HTTP method used to send the collection to the resource. If null, the default is POST for http and STOR for ftp.

data

NameValueCollection

The NameValueCollection to send to the resource.

Returns

Task<Byte[]>

The task object representing the asynchronous operation. The Result property on the task object returns a Byte array containing the response sent by the server.

Exceptions

ArgumentNullException

The address parameter is null.

-or-

The data parameter is null.

WebException

The URI formed by combining BaseAddress, and address is invalid.

-or-

method cannot be used to send content.

-or-

There was no response from the server hosting the resource.

-or-

An error occurred while opening the stream.

-or-

The Content-type header is not null or "application/x-www-form-urlencoded".

Remarks

Caution

WebRequest, HttpWebRequest, ServicePoint, and WebClient are obsolete, and you shouldn't use them for new development. Use HttpClient instead.

This operation will not block. The returned Task<TResult> object will complete after the name/value collection has been uploaded to the resource. The name/value collection is sent asynchronously using thread resources that are automatically allocated from the thread pool.

In .NET Framework and .NET Core 1.0, you can cancel asynchronous operations that have not completed by calling the CancelAsync method.

If the underlying request is not understood by the server, the underlying protocol classes determine what occurs. Typically, a WebException is thrown with the Status property set to indicate the error.

If the Content-type header is null, this method sets it to "application/x-www-form-urlencoded".

If the BaseAddress property is not an empty string ("") and address does not contain an absolute URI, address must be a relative URI that is combined with BaseAddress to form the absolute URI of the requested data. If the QueryString property is not an empty string, it is appended to address.

This method uses the STOR command to upload an FTP resource. For an HTTP resource, the POST method is used.

Note

This member outputs trace information when you enable network tracing in your application. For more information, see Network Tracing in .NET Framework.