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WebClient.UploadData Method

  • Reference

Definition

Namespace:
System.Net
Assembly:
System.Net.WebClient.dll
Assembly:
System.dll
Assembly:
netstandard.dll

Uploads a data buffer to a resource with the specified URI.

Overloads

UploadData(String, Byte[])

Uploads a data buffer to a resource identified by a URI.
UploadData(Uri, Byte[])

Uploads a data buffer to a resource identified by a URI.
UploadData(String, String, Byte[])

Uploads a data buffer to the specified resource, using the specified method.
UploadData(Uri, String, Byte[])

Uploads a data buffer to the specified resource, using the specified method.

UploadData(String, Byte[])

Source:
WebClient.cs
Source:
WebClient.cs
Source:
WebClient.cs

Uploads a data buffer to a resource identified by a URI.

public:
 cli::array <System::Byte> ^ UploadData(System::String ^ address, cli::array <System::Byte> ^ data);
public byte[] UploadData (string address, byte[] data);
member this.UploadData : string * byte[] -> byte[]
Public Function UploadData (address As String, data As Byte()) As Byte()

Parameters

address
String

The URI of the resource to receive the data.

data
Byte[]

The data buffer to send to the resource.

Returns

Byte[]

A Byte array containing the body of the response from the resource.

Exceptions

ArgumentNullException

The address parameter is null.

WebException

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

-or-

data is null.

-or-

An error occurred while sending the data.

-or-

There was no response from the server hosting the resource.

Examples

The following code example converts a string entered from the console to a Byte array and posts the array to the specified server using UploadData. Any response from the server is displayed to the console.

Console::Write( "\nPlease enter the URI to post data to: " );
String^ uriString = Console::ReadLine();
// Create a new WebClient instance.
WebClient^ myWebClient = gcnew WebClient;
Console::WriteLine( "\nPlease enter the data to be posted to the URI {0}:", uriString );
String^ postData = Console::ReadLine();
// Apply ASCII Encoding to obtain the String* as a Byte array.
array<Byte>^ postArray = Encoding::ASCII->GetBytes( postData );
Console::WriteLine( "Uploading to {0} ...", uriString );
myWebClient->Headers->Add( "Content-Type", "application/x-www-form-urlencoded" );

//UploadData implicitly sets HTTP POST as the request method.
array<Byte>^responseArray = myWebClient->UploadData( uriString, postArray );

// Decode and display the response.
Console::WriteLine( "\nResponse received was: {0}", Encoding::ASCII->GetString( responseArray ) );

    Console.Write("\nPlease enter the URI to post data to : ");
    string uriString = Console.ReadLine();
    // Create a new WebClient instance.
    WebClient myWebClient = new WebClient();
    Console.WriteLine("\nPlease enter the data to be posted to the URI {0}:",uriString);
    string postData = Console.ReadLine();
    // Apply ASCII Encoding to obtain the string as a byte array.
    byte[] postArray = Encoding.ASCII.GetBytes(postData);
    Console.WriteLine("Uploading to {0} ...",  uriString);							
 myWebClient.Headers.Add("Content-Type","application/x-www-form-urlencoded");

    //UploadData implicitly sets HTTP POST as the request method.
    byte[] responseArray = myWebClient.UploadData(uriString,postArray);

    // Decode and display the response.
    Console.WriteLine("\nResponse received was :{0}", Encoding.ASCII.GetString(responseArray));

Console.Write(ControlChars.Cr + "Please enter the URI to post data to : ")
Dim uriString As String = Console.ReadLine()

' Create a new WebClient instance.
Dim myWebClient As New WebClient()
Console.WriteLine(ControlChars.Cr + "Please enter the data to be posted to the URI {0}:", uriString)
Dim postData As String = Console.ReadLine()
' Apply ASCII Encoding to obtain the string as a byte array.
Dim postArray As Byte() = Encoding.ASCII.GetBytes(postData)
Console.WriteLine("Uploading to {0} ...", uriString)
myWebClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded")

' UploadData implicitly sets HTTP POST as the request method.
Dim responseArray As Byte() = myWebClient.UploadData(uriString, postArray)

' Decode and display the response.
Console.WriteLine(ControlChars.Cr + "Response received was :{0}", Encoding.ASCII.GetString(responseArray))

Remarks

Caution

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

The UploadData method sends a data buffer to a resource.

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

The UploadData method sends the content of data to the server without encoding it. This method blocks while uploading the data. To continue executing while waiting for the server's response, use one of the UploadDataAsync methods.

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.

Note

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

Applies to

UploadData(Uri, Byte[])

Source:
WebClient.cs
Source:
WebClient.cs
Source:
WebClient.cs

Uploads a data buffer to a resource identified by a URI.

public:
 cli::array <System::Byte> ^ UploadData(Uri ^ address, cli::array <System::Byte> ^ data);
public byte[] UploadData (Uri address, byte[] data);
member this.UploadData : Uri * byte[] -> byte[]
Public Function UploadData (address As Uri, data As Byte()) As Byte()

Parameters

address
Uri

The URI of the resource to receive the data.

data
Byte[]

The data buffer to send to the resource.

Returns

Byte[]

A Byte array containing the body of the response from the resource.

Exceptions

ArgumentNullException

The address parameter is null.

WebException

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

-or-

data is null.

-or-

An error occurred while sending the data.

-or-

There was no response from the server hosting the resource.

Remarks

Caution

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

The UploadData method sends a data buffer to a resource.

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

The UploadData method sends the content of data to the server without encoding it. This method blocks while uploading the data. To continue executing while waiting for the server's response, use one of the UploadDataAsync methods.

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.

Note

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

Applies to

UploadData(String, String, Byte[])

Source:
WebClient.cs
Source:
WebClient.cs
Source:
WebClient.cs

Uploads a data buffer to the specified resource, using the specified method.

public:
 cli::array <System::Byte> ^ UploadData(System::String ^ address, System::String ^ method, cli::array <System::Byte> ^ data);
public byte[] UploadData (string address, string? method, byte[] data);
public byte[] UploadData (string address, string method, byte[] data);
member this.UploadData : string * string * byte[] -> byte[]
Public Function UploadData (address As String, method As String, data As Byte()) As Byte()

Parameters

address
String

The URI of the resource to receive the data.

method
String

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

data
Byte[]

The data buffer to send to the resource.

Returns

Byte[]

A Byte array containing the body of the response from the resource.

Exceptions

ArgumentNullException

The address parameter is null.

WebException

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

-or-

data is null.

-or-

An error occurred while uploading the data.

-or-

There was no response from the server hosting the resource.

Examples

The following code example converts a string entered from the console into a byte array and posts the array to the specified server using UploadData. Any response from the server is displayed to the console.

String^ uriString;
Console::Write( "\nPlease enter the URI to post data to {for example, http://www.contoso.com}: " );
uriString = Console::ReadLine();

// Create a new WebClient instance.
WebClient^ myWebClient = gcnew WebClient;
Console::WriteLine( "\nPlease enter the data to be posted to the URI {0}:", uriString );
String^ postData = Console::ReadLine();
myWebClient->Headers->Add( "Content-Type", "application/x-www-form-urlencoded" );

// Displays the headers in the request
Console::Write( "Resulting Request Headers: ");
Console::WriteLine(myWebClient->Headers);

// Apply ASCII Encoding to obtain the String^ as a Byte array.
array<Byte>^ byteArray = Encoding::ASCII->GetBytes( postData );
Console::WriteLine( "Uploading to {0} ...", uriString );
// Upload the input String* using the HTTP 1.0 POST method.
array<Byte>^responseArray = myWebClient->UploadData( uriString, "POST", byteArray );
// Decode and display the response.
Console::WriteLine( "\nResponse received was {0}",
   Encoding::ASCII->GetString( responseArray ) );

   string uriString;
       Console.Write("\nPlease enter the URI to post data to {for example, http://www.contoso.com} : ");
       uriString = Console.ReadLine();

       // Create a new WebClient instance.
       WebClient myWebClient = new WebClient();
       Console.WriteLine("\nPlease enter the data to be posted to the URI {0}:",uriString);
       string postData = Console.ReadLine();
       myWebClient.Headers.Add("Content-Type","application/x-www-form-urlencoded");

 // Display the headers in the request
       Console.Write("Resulting Request Headers: ");
       Console.WriteLine(myWebClient.Headers.ToString());
       
       // Apply ASCII Encoding to obtain the string as a byte array.

       byte[] byteArray = Encoding.ASCII.GetBytes(postData);
       Console.WriteLine("Uploading to {0} ...",  uriString);						
       // Upload the input string using the HTTP 1.0 POST method.
       byte[] responseArray = myWebClient.UploadData(uriString,"POST",byteArray);
       
       // Decode and display the response.
       Console.WriteLine("\nResponse received was {0}",
       Encoding.ASCII.GetString(responseArray));
                 

Dim uriString As String
Console.Write(ControlChars.Cr + "Please enter the URI to post data to{for example, http://www.contoso.com} : ")
uriString = Console.ReadLine()

' Create a new WebClient instance.
Dim myWebClient As New WebClient()
Console.WriteLine(ControlChars.Cr + "Please enter the data to be posted to the URI {0}:", uriString)
Dim postData As String = Console.ReadLine()
myWebClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded")

' Display the headers in the request
Console.Write("Resulting Request Headers: ")
Console.Writeline(myWebClient.Headers.ToString())

' Apply ASCII Encoding to obtain the string as a byte array.
Dim byteArray As Byte() = Encoding.ASCII.GetBytes(postData)
Console.WriteLine("Uploading to {0} ...", uriString)
' Upload the input string using the HTTP 1.0 POST method.
Dim responseArray As Byte() = myWebClient.UploadData(uriString, "POST", byteArray)
' Decode and display the response.
Console.WriteLine(ControlChars.Cr + "Response received was :{0}", Encoding.ASCII.GetString(responseArray))

Remarks

Caution

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

The UploadData method sends a data buffer to a resource using the HTTP method specified in the method parameter, and returns any response from the server. This method blocks while uploading the data. To continue executing while waiting for the server's response, use one of the UploadDataAsync methods.

The UploadData method sends the content of data to the server without encoding it.

If the method parameter specifies a verb that 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 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.

Note

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

Applies to

UploadData(Uri, String, Byte[])

Source:
WebClient.cs
Source:
WebClient.cs
Source:
WebClient.cs

Uploads a data buffer to the specified resource, using the specified method.

public:
 cli::array <System::Byte> ^ UploadData(Uri ^ address, System::String ^ method, cli::array <System::Byte> ^ data);
public byte[] UploadData (Uri address, string? method, byte[] data);
public byte[] UploadData (Uri address, string method, byte[] data);
member this.UploadData : Uri * string * byte[] -> byte[]
Public Function UploadData (address As Uri, method As String, data As Byte()) As Byte()

Parameters

address
Uri

The URI of the resource to receive the data.

method
String

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

data
Byte[]

The data buffer to send to the resource.

Returns

Byte[]

A Byte array containing the body of the response from the resource.

Exceptions

ArgumentNullException

The address parameter is null.

WebException

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

-or-

data is null.

-or-

An error occurred while uploading the data.

-or-

There was no response from the server hosting the resource.

Remarks

Caution

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

The UploadData method sends a data buffer to a resource using the HTTP method specified in the method parameter, and returns any response from the server. This method blocks while uploading the data. To continue executing while waiting for the server's response, use one of the UploadDataAsync methods.

The UploadData method sends the content of data to the server without encoding it.

If the method parameter specifies a verb that 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 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.

Note

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

Applies to