Gets or sets the Content-length HTTP header.
Assembly: System (in System.dll)
abstract ContentLength : int64 with get, set override ContentLength : int64 with get, set
Property ValueType: 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.
The property contains the value to send as the Content-length HTTP header with the request.
Any value other than -1 in the 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 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.
The value for this property is stored in WebHeaderCollection. If WebHeaderCollection is set, the property value is lost.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.