HttpWebRequest.ContentType-Eigenschaft

Ruft den Wert des Content-type-HTTP-Headers ab oder legt diesen fest.

Namespace: System.Net
Assembly: System (in system.dll)

Syntax

'Declaration
Public Overrides Property ContentType As String
'Usage
Dim instance As HttpWebRequest
Dim value As String

value = instance.ContentType

instance.ContentType = value

public override string ContentType { get; set; }

public:
virtual property String^ ContentType {
    String^ get () override;
    void set (String^ value) override;
}

/** @property */
public String get_ContentType ()

/** @property */
public void set_ContentType (String value)

public override function get ContentType () : String

public override function set ContentType (value : String)

Eigenschaftenwert

Der Wert des Content-type-HTTP-Headers. Der Standardwert ist NULL (Nothing in Visual Basic).

Hinweise

Die ContentType-Eigenschaft enthält den Medientyp der Anforderung. Der ContentType-Eigenschaft zugewiesene Werte ersetzen alle vorhandenen Inhalte, wenn die Anforderung den Content-type-HTTP-Header sendet.

Legen Sie die ContentType-Eigenschaft auf NULL (Nothing in Visual Basic) fest, um den Content-type-HTTP-Header zu löschen.

Hinweis

Der Wert für diese Eigenschaft wird in der WebHeaderCollection gespeichert. Wenn WebHeaderCollection festgelegt wird, geht der Eigenschaftenwert verloren.

Beispiel

Im folgenden Codebeispiel wird die ContentType-Eigenschaft festgelegt.

' Set the 'Method' property of the 'Webrequest' to 'POST'.
myHttpWebRequest.Method = "POST"

Console.WriteLine(ControlChars.Cr + "Please enter the data to be posted to the (https://www.contoso.com/codesnippets/next.asp) Uri :")
' Create a new string object to POST data to the Url.
Dim inputData As String = Console.ReadLine()
Dim postData As String = "firstone" + ChrW(61) + inputData
Dim encoding As New ASCIIEncoding()
Dim byte1 As Byte() = encoding.GetBytes(postData)
' Set the content type of the data being posted.
myHttpWebRequest.ContentType = "application/x-www-form-urlencoded"
' Set the content length of the string being posted.
myHttpWebRequest.ContentLength = byte1.Length
Dim newStream As Stream = myHttpWebRequest.GetRequestStream()
newStream.Write(byte1, 0, byte1.Length)
Console.WriteLine("The value of 'ContentLength' property after sending the data is {0}", myHttpWebRequest.ContentLength)
newStream.Close()

// Set the 'Method' property of the 'Webrequest' to 'POST'.
myHttpWebRequest.Method = "POST";
Console.WriteLine ("\nPlease enter the data to be posted to the (https://www.contoso.com/codesnippets/next.asp) Uri :");

// Create a new string object to POST data to the Url.
string inputData = Console.ReadLine ();


string postData = "firstone=" + inputData;
ASCIIEncoding encoding = new ASCIIEncoding ();
byte[] byte1 = encoding.GetBytes (postData);

// Set the content type of the data being posted.
myHttpWebRequest.ContentType = "application/x-www-form-urlencoded";

// Set the content length of the string being posted.
myHttpWebRequest.ContentLength = byte1.Length;

Stream newStream = myHttpWebRequest.GetRequestStream ();

newStream.Write (byte1, 0, byte1.Length);
Console.WriteLine ("The value of 'ContentLength' property after sending the data is {0}", myHttpWebRequest.ContentLength);

// Close the Stream object.
newStream.Close ();

// Set the 'Method' property of the 'Webrequest' to 'POST'.
myHttpWebRequest->Method = "POST";
Console::WriteLine( "\nPlease enter the data to be posted to the (https://www.contoso.com/codesnippets/next.asp) Uri :" );

// Create a new String* Object* to POST data to the Url.
String^ inputData = Console::ReadLine();

String^ postData = String::Concat( "firstone= ", inputData );
ASCIIEncoding^ encoding = gcnew ASCIIEncoding;
array<Byte>^ byte1 = encoding->GetBytes( postData );

// Set the content type of the data being posted.
myHttpWebRequest->ContentType = "application/x-www-form-urlencoded";

// Set the content length of the String* being posted.
myHttpWebRequest->ContentLength = byte1->Length;

Stream^ newStream = myHttpWebRequest->GetRequestStream();

newStream->Write( byte1, 0, byte1->Length );
Console::WriteLine( "The value of 'ContentLength' property after sending the data is {0}", myHttpWebRequest->ContentLength );

// Close the Stream Object*.
newStream->Close();

// Set the 'Method' property of the 'Webrequest' to 'POST'.
myHttpWebRequest.set_Method("POST");
Console.WriteLine("\nPlease enter the data to be posted to the "
    + "(https://www.contoso.com/codesnippets/next.asp) Uri :");

// Create a new string object to POST data to the Url.
String inputData = Console.ReadLine();

String postData = "firstone=" + inputData;
ASCIIEncoding encoding = new ASCIIEncoding();
ubyte byte1[] = encoding.GetBytes(postData);

// Set the content type of the data being posted.
myHttpWebRequest.set_ContentType("application/x-www-form-"
    +"urlencoded");
// Set the content length of the string being posted.
myHttpWebRequest.set_ContentLength(postData.length());

Stream newStream = myHttpWebRequest.GetRequestStream();

newStream.Write(byte1, 0, byte1.length);
Console.WriteLine("The value of 'ContentLength' property after"
    + " sending the data is {0}", 
    System.Convert.ToString(myHttpWebRequest.get_ContentLength()));
// Close the Stream object.
newStream.Close();

Plattformen

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

.NET Compact Framework

Unterstützt in: 2.0, 1.0

Siehe auch

Referenz

HttpWebRequest-Klasse
HttpWebRequest-Member
System.Net-Namespace