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

Definición

Obtiene o establece el encabezado 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

Valor de propiedad

Número de bytes de los datos enviados al recurso de Internet.The number of bytes of data to send to the Internet resource. El valor predeterminado es -1, que indica que no se estableció el valor de la propiedad y no hay datos de solicitud para enviar.The default is -1, which indicates the property has not been set and that there is no request data to send.

Excepciones

Ejemplos

En el ejemplo de código siguiente ContentLength se establece la propiedad en la longitud de la cadena que se va a exponer.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()

Comentarios

La ContentLength propiedad contiene el valor que se va a Content-length enviar como el encabezado HTTP con la solicitud.The ContentLength property contains the value to send as the Content-length HTTP header with the request.

Cualquier valor distinto de-1 en la ContentLength propiedad indica que la solicitud carga los datos y que solo se permite establecer en la Method propiedad los métodos que cargan datos.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.

Una vez ContentLength que la propiedad se establece en un valor, ese número de bytes se debe escribir en la secuencia de solicitud que se devuelve GetRequestStream llamando al método EndGetRequestStream o BeginGetRequestStream a los métodos y.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.

Nota

El valor de esta propiedad se almacena en WebHeaderCollection.The value for this property is stored in WebHeaderCollection. Si se establece WebHeaderCollection, se pierde el valor de propiedad.If WebHeaderCollection is set, the property value is lost.

Se aplica a