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 auf die Länge der Zeichenfolge festgelegt, die gesendet 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, der Content-length als-HTTP-Header mit der Anforderung gesendet werden soll.The ContentLength property contains the value to send as the Content-length HTTP header with the request.

Jeder andere Wert als-1 in der ContentLength -Eigenschaft gibt an, dass die Anforderung Daten hochlädt und dass nur Methoden, die Daten hochladen, in Method der-Eigenschaft festgelegt werden können.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.

Nachdem die ContentLength BeginGetRequestStream -Eigenschaft auf einen Wert festgelegt wurde, muss die Anzahl von Bytes in den Anforderungs Datenstrom geschrieben werden, der durch GetRequestStream Aufrufen der-Methode oder der EndGetRequestStream -Methode und der-Methode zurückgegeben wird.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: