HttpWebRequest.ContentLength Property

Gets or sets the Content-length HTTP header.

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

public override function get ContentLength () : long 
public override function set ContentLength (value : long)

Property Value

Type: System.Int64
The number of bytes of data to send to the Internet resource. The default is -1, which indicates the property has not been set and that there is no request data to send.

ExceptionCondition
InvalidOperationException

The request has been started by calling the GetRequestStream, BeginGetRequestStream, GetResponse, or BeginGetResponse method.

ArgumentOutOfRangeException

The new ContentLength value is less than 0.

The ContentLength property contains the value to send as the Content-length HTTP header with the request.

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.

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.

NoteNote:

The value for this property is stored in WebHeaderCollection. If WebHeaderCollection is set, the property value is lost.

The following code example sets the ContentLength property to the length of the string being posted.

No code example is currently available or this language may not be supported.
// Set the 'Method' property of the 'Webrequest' to 'POST'.
myHttpWebRequest->Method=S"POST";
Console::WriteLine(S"\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(S"firstone= ", inputData);
ASCIIEncoding* encoding = new ASCIIEncoding();
Byte byte1[] = encoding->GetBytes(postData);
// Set the content type of the data being posted.
myHttpWebRequest->ContentType = S"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(S"The value of 'ContentLength' property after sending the data is {0}",
   __box(myHttpWebRequest->ContentLength));
// Close the Stream Object*.
newStream->Close();

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0
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