IHttpAsyncHandler.EndProcessRequest not being called

[=?Utf-8?B?U3RldmUgV3JpZ2h0?=]

Hi All,

This is my first time using this interface, so I am sure I am just missing
something stupid. When my Http Handler gets called, the Begin runs and the
delegate runs, but the EndProcessReque st never runs and the page hangs
forever. Any idea why?

Public Class MyAsyncWebHandl er
Implements IHttpAsyncHandl er
Implements IReadOnlySessio nState

Public Sub ProcessRequest( ByVal context As HttpContext) Implements
IHttpHandler.Pr ocessRequest
' not called
End Sub

Public ReadOnly Property IsReusable() As Boolean Implements
IHttpHandler.Is Reusable
Get
Return True
End Get
End Property

' Define the private Async method Delegate
Private Delegate Sub AsyncProcessReq uest(ByVal context As HttpContext)

Public Function BeginProcessReq uest( _
ByVal context As HttpContext, ByVal cb As AsyncCallback,
ByVal state As Object) _
As IAsyncResult Implements
IHttpAsyncHandl er.BeginProcess Request

Dim dlgt As New AsyncProcessReq uest(AddressOf DoMyStuff)
Return dlgt.BeginInvok e(context, Nothing, Nothing)
End Function

Public Sub EndProcessReque st(ByVal ar As IAsyncResult) Implements
IHttpAsyncHandl er.EndProcessRe quest
Dim dlgt As AsyncProcessReq uest = DirectCast(Dire ctCast(ar,
AsyncResult).As yncDelegate, AsyncProcessReq uest)
dlgt.EndInvoke( ar)
End Sub

Public Sub DoMyStuff(ByVal context As HttpContext)
Threading.Threa d.Sleep(3000)
End Sub

End Class

Thanks,

--
Steve Wright, MCSD, MCDBA, MCSE
Microsoft Architect
MSI - Omaha, NE

[=?Utf-8?B?YnJ1Y2UgYmFya2Vy?=]

RE: IHttpAsyncHandl er.EndProcessRe quest not being called

is your async code async? is it calling SetCompleted()?


-- bruce (sqlwork.com)


"Steve Wright" wrote:

Hi All,
>
This is my first time using this interface, so I am sure I am just missing
something stupid. When my Http Handler gets called, the Begin runs and the
delegate runs, but the EndProcessReque st never runs and the page hangs
forever. Any idea why?
>
Public Class MyAsyncWebHandl er
Implements IHttpAsyncHandl er
Implements IReadOnlySessio nState
>
Public Sub ProcessRequest( ByVal context As HttpContext) Implements
IHttpHandler.Pr ocessRequest
' not called
End Sub
>
Public ReadOnly Property IsReusable() As Boolean Implements
IHttpHandler.Is Reusable
Get
Return True
End Get
End Property
>
' Define the private Async method Delegate
Private Delegate Sub AsyncProcessReq uest(ByVal context As HttpContext)
>
Public Function BeginProcessReq uest( _
ByVal context As HttpContext, ByVal cb As AsyncCallback,
ByVal state As Object) _
As IAsyncResult Implements
IHttpAsyncHandl er.BeginProcess Request
>
Dim dlgt As New AsyncProcessReq uest(AddressOf DoMyStuff)
Return dlgt.BeginInvok e(context, Nothing, Nothing)
End Function
>
Public Sub EndProcessReque st(ByVal ar As IAsyncResult) Implements
IHttpAsyncHandl er.EndProcessRe quest
Dim dlgt As AsyncProcessReq uest = DirectCast(Dire ctCast(ar,
AsyncResult).As yncDelegate, AsyncProcessReq uest)
dlgt.EndInvoke( ar)
End Sub
>
Public Sub DoMyStuff(ByVal context As HttpContext)
Threading.Threa d.Sleep(3000)
End Sub
>
End Class
>
Thanks,
>
--
Steve Wright, MCSD, MCDBA, MCSE
Microsoft Architect
MSI - Omaha, NE

[=?Utf-8?B?U3RldmUgV3JpZ2h0?=]

RE: IHttpAsyncHandl er.EndProcessRe quest not being called


Thanks, Bruce.

I found that my problem was that I forgot to pass the callback when I did
the begin.

This:
Return dlgt.BeginInvok e(context, Nothing, Nothing)

should have been this:
Return dlgt.BeginInvok e(context, cb, Nothing)

When would I call SetComplete()? I am not familiar with that.

Thanks for your help,

--
Steve Wright, MCSD, MCDBA, MCSE
Microsoft Architect
MSI - Omaha, NE


"bruce barker" wrote:

is your async code async? is it calling SetCompleted()?
>
>
-- bruce (sqlwork.com)
>