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

Definition

Ruft den Content-length-HTTP-Header ab oder legt diesen fest.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

Eigenschaftswert

Die Anzahl der Bytes der an die Internetressource zu sendenden Daten.The number of bytes of data to send to the Internet resource. Der Standardwert ist -1. Dieser Wert gibt an, dass die Eigenschaft nicht festgelegt wurde und keine zu sendenden Anforderungsdaten vorhanden sind.The default is -1, which indicates the property has not been set and that there is no request data to send.

Ausnahmen

Beispiele

Im folgenden Codebeispiel wird die ContentLength Eigenschaft, um die Länge der Zeichenfolge bereitgestellt wird.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()

Hinweise

Die ContentLength Eigenschaft enthält den Wert als senden die Content-length HTTP-Header mit der Anforderung.The ContentLength property contains the value to send as the Content-length HTTP header with the request.

Einen anderen Wert als 1, in der ContentLength Eigenschaft gibt an, dass die Anforderung Daten hochlädt und dürfen nur die Methoden, die Daten hochladen festgelegt werden, der Method Eigenschaft.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.

Nach der ContentLength Eigenschaft auf einen Wert festgelegt ist, diese Anzahl an Bytes muss geschrieben werden in den Anforderungsdatenstrom, die durch den Aufruf zurückgegeben wird das GetRequestStream -Methode oder beide der BeginGetRequestStream und EndGetRequestStream Methoden.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.

Hinweis

Der Wert für diese Eigenschaft wird in der WebHeaderCollection gespeichert.The value for this property is stored in WebHeaderCollection. Wenn WebHeaderCollection festgelegt wird, geht der Eigenschaftswert verloren.If WebHeaderCollection is set, the property value is lost.

Gilt für: