HttpWebRequest.ContentLength HttpWebRequest.ContentLength HttpWebRequest.ContentLength HttpWebRequest.ContentLength Property

Définition

Obtient ou définit l’en-tête HTTP Content-length.Gets or sets the Content-length HTTP header.

public:
 virtual property long ContentLength { long get(); void set(long value); };
public override long ContentLength { get; set; }
member this.ContentLength : int64 with get, set
Public Overrides Property ContentLength As Long

Valeur de propriété

Nombre d'octets de données à envoyer à la ressource Internet.The number of bytes of data to send to the Internet resource. La valeur par défaut est -1, ce qui indique que la propriété n'a pas été définie et qu'aucune donnée de la requête ne doit être envoyée.The default is -1, which indicates the property has not been set and that there is no request data to send.

Exceptions

Exemples

L’exemple de code suivant affecte ContentLength à la propriété la longueur de la chaîne en cours de publication.The following code example sets the ContentLength property to the length of the string being posted.

// Set the 'Method' property of the 'Webrequest' to 'POST'.
myHttpWebRequest->Method = "POST";
Console::WriteLine( "\nPlease enter the data to be posted to the (http://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.Method = "POST";
Console.WriteLine ("\nPlease enter the data to be posted to the (http://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(ControlChars.Cr + "Please enter the data to be posted to the (http://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()

Remarques

La ContentLength propriété contient la valeur à envoyer Content-length en tant qu’en-tête HTTP avec la requête.The ContentLength property contains the value to send as the Content-length HTTP header with the request.

Toute valeur autre que-1 dans la ContentLength propriété indique que la demande télécharge des données et que seules les méthodes qui chargent des données peuvent être définies dans la Method propriété.Any value other than -1 in the ContentLength property indicates that the request uploads data and that only methods that upload data are allowed to be set in the Method property.

Une fois ContentLength la propriété définie sur une valeur, ce nombre d’octets doit être écrit dans le flux de requête retourné en appelant la GetRequestStream méthode BeginGetRequestStream , EndGetRequestStream ou à la fois et les méthodes.After the ContentLength property is set to a value, that number of bytes must be written to the request stream that is returned by calling the GetRequestStream method or both the BeginGetRequestStream and the EndGetRequestStream methods.

Notes

La valeur de cette propriété est stockée dans WebHeaderCollection.The value for this property is stored in WebHeaderCollection. Si WebHeaderCollection est défini, la valeur de la propriété est perdue.If WebHeaderCollection is set, the property value is lost.

S’applique à