"Pazza" wrote:

> Hi,
>
> Should the form submit button click event handler fire when posting to a
> aspx page using httpwebrequest.
>
> In my tests the load event fires when POSTing back but not the button click
> event handler.
> I first issue a GET, extract __VIEWSTATE and then POST back __VIEWSTATE and
> the form values.
>
> I am hoping to use this technique for a screen scraper but if I can't get
> the submit
> buttons click event handler to fire its no use.
>
> Thanks,
> Pazza
>
>

"Jakob Christensen" wrote:

> Are you posting any value for the button when posting the form values?  My
> guess is you would have to post something like "Button1=Button".  Otherwise
> the asp.net framework has no way of telling that the button has been
> "clicked".
>
> HTH, Jakob.
>
>
> "Pazza" wrote:
>
> > Hi,
> >
> > Should the form submit button click event handler fire when posting to a
> > aspx page using httpwebrequest.
> >
> > In my tests the load event fires when POSTing back but not the button click
> > event handler.
> > I first issue a GET, extract __VIEWSTATE and then POST back __VIEWSTATE and
> > the form values.
> >
> > I am hoping to use this technique for a screen scraper but if I can't get
> > the submit
> > buttons click event handler to fire its no use.
> >
> > Thanks,
> > Pazza
> >
> >

"Pazza" wrote:

> Yep, I'm posting Button1=Clicked, see below ...
>
> viewState = SrcViewState 'a readonly property that gets __VIEWSTATE
> postData.Append("__VIEWSTATE=")
> postData.Append(viewState)
> postData.Append("&Button1=Clicked")
> Dim encodedPostData As String
> encodedPostData = HttpUtility.UrlEncode(postData.ToString)
> hrqURL = HttpWebRequest.Create(m_strURL)
> hrqURL.ContentType = "application/x-www-form-urlencoded"
> hrqURL.ContentLength = encodedPostData.Length
> hrqURL.Method = "POST"
> Dim cookies As New CookieContainer
> hrqURL.CookieContainer = cookies
> Dim requestWriter As New StreamWriter(hrqURL.GetRequestStream())
> requestWriter.Write(EncodedPostData)
> requestWriter.Close()
> hrspURL = hrqURL.GetResponse()
>
> "Jakob Christensen" wrote:
>
> > Are you posting any value for the button when posting the form values?  My
> > guess is you would have to post something like "Button1=Button".  Otherwise
> > the asp.net framework has no way of telling that the button has been
> > "clicked".
> >
> > HTH, Jakob.
> >
> >
> > "Pazza" wrote:
> >
> > > Hi,
> > >
> > > Should the form submit button click event handler fire when posting to a
> > > aspx page using httpwebrequest.
> > >
> > > In my tests the load event fires when POSTing back but not the button click
> > > event handler.
> > > I first issue a GET, extract __VIEWSTATE and then POST back __VIEWSTATE and
> > > the form values.
> > >
> > > I am hoping to use this technique for a screen scraper but if I can't get
> > > the submit
> > > buttons click event handler to fire its no use.
> > >
> > > Thanks,
> > > Pazza
> > >
> > >

"Jakob Christensen" wrote:

> I can not get it working when posting __VIEWSTATE (It results in an internal
> server error).  My suggestion is that you don't try to fire the Click event
> of the button.  Instead change your code to something like (assuming you
> control the server code):
>
> if (Request["Button1"] != null)
> {
>   // do some work
> }
>
> Or perhaps a web service is the way to go?
>
> Regards, Jakob.
>
>
> "Pazza" wrote:
>
> > Yep, I'm posting Button1=Clicked, see below ...
> >
> > viewState = SrcViewState 'a readonly property that gets __VIEWSTATE
> > postData.Append("__VIEWSTATE=")
> > postData.Append(viewState)
> > postData.Append("&Button1=Clicked")
> > Dim encodedPostData As String
> > encodedPostData = HttpUtility.UrlEncode(postData.ToString)
> > hrqURL = HttpWebRequest.Create(m_strURL)
> > hrqURL.ContentType = "application/x-www-form-urlencoded"
> > hrqURL.ContentLength = encodedPostData.Length
> > hrqURL.Method = "POST"
> > Dim cookies As New CookieContainer
> > hrqURL.CookieContainer = cookies
> > Dim requestWriter As New StreamWriter(hrqURL.GetRequestStream())
> > requestWriter.Write(EncodedPostData)
> > requestWriter.Close()
> > hrspURL = hrqURL.GetResponse()
> >
> > "Jakob Christensen" wrote:
> >
> > > Are you posting any value for the button when posting the form values?  My
> > > guess is you would have to post something like "Button1=Button".  Otherwise
> > > the asp.net framework has no way of telling that the button has been
> > > "clicked".
> > >
> > > HTH, Jakob.
> > >
> > >
> > > "Pazza" wrote:
> > >
> > > > Hi,
> > > >
> > > > Should the form submit button click event handler fire when posting to a
> > > > aspx page using httpwebrequest.
> > > >
> > > > In my tests the load event fires when POSTing back but not the button click
> > > > event handler.
> > > > I first issue a GET, extract __VIEWSTATE and then POST back __VIEWSTATE and
> > > > the form values.
> > > >
> > > > I am hoping to use this technique for a screen scraper but if I can't get
> > > > the submit
> > > > buttons click event handler to fire its no use.
> > > >
> > > > Thanks,
> > > > Pazza
> > > >
> > > >