Using HttpWebRequest to Post a byte array

[Fred Herring]

I currently use httpwebrequest to download large byte array files from my
server. I am curious about how to change my httpwebrequest code to allow
posing a large byte array to a virtual foldeer. This is my download code
which work well in
returning a large byte array from the server:

Function GetImageFromURL (ByVal url As String) As Byte()
allDone.Reset()
Try
Dim wr As HttpWebRequest = DirectCast(WebR equest.Create(u rl), HttpWebRequest)
If Not ProxyObject Is Nothing Then wr.Proxy = ProxyObject
Dim MRS As New RequestState
MRS.request = wr
Dim result As IAsyncResult = CType(wr.BeginG etResponse(Addr essOf
RespCallBack, MRS), IAsyncResult)
allDone.WaitOne ()
MRS.response.Cl ose()
Return MRS.ReturnBLOB
Catch MyException As Exception
End Try
End Function

Private Sub RespCallBack(By Val asyncResult As IAsyncResult)
Dim MRS As RequestState = CType(asyncResu lt.AsyncState, RequestState)
Dim wr2 As HttpWebRequest = CType(MRS.reque st, HttpWebRequest)
MRS.response = CType(wr2.EndGe tResponse(async Result), HttpWebResponse )
Dim RS As Stream = MRS.response.Ge tResponseStream ()
MRS.responseStr eam = RS
Dim br As BinaryReader = New BinaryReader(MR S.responseStrea m)
Dim bytesize As Long = MRS.response.Co ntentLength
MRS.ReturnBLOB = br.ReadBytes(CI nt(bytesize))
allDone.Set()
End