VB.NET Screen Stops Refreshing After Losing Focus??

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  • Chris Moore
    #1

    VB.NET Screen Stops Refreshing After Losing Focus??

    I have a .NET form where I am updating a progress bar & counter. As long
    as the form never loses focus, everything on the form refreshs fine. But If
    I open another window (like Windows Explorer) and then re-select my .net
    form, thos fields no longer refresh. Why and ho wdo I make it start
    refreshing again?

    Thanks
    Tags: None
    • Mehdi
      #2
      Re: VB.NET Screen Stops Refreshing After Losing Focus??

      On Thu, 01 Jun 2006 13:29:45 -0700, Chris Moore wrote:
      [color=blue]
      > I have a .NET form where I am updating a progress bar & counter. As long
      > as the form never loses focus, everything on the form refreshs fine. But If
      > I open another window (like Windows Explorer) and then re-select my .net
      > form, thos fields no longer refresh. Why and ho wdo I make it start
      > refreshing again?[/color]

      It sounds like you're accessing some of your UI controls from a worker
      thread (the progress bar and the counter probably). UI controls must be
      accessed from the UI thread only. If you have to access them from a worker
      thread, use Control.Invoke or Control.BeginIn voke to marshall the call to
      the UI thread.

        Comment

        • Chris Moore
          #3
          Re: VB.NET Screen Stops Refreshing After Losing Focus??

          Mehdi <vioccc@REMOVEM E.gmail.com> wrote in
          I have no idea what you just said, sorry. What I have is 1 form with a
          button, progress bar & label on it. When I run it, I press the button
          that then calls a procedure (that is in the form) to process some records
          and update the controls.

          What am I missing or not understanding?

          Thanks

          news:heawgmahab xx.zuvwiijdairp .dlg@40tude.net :
          [color=blue]
          > On Thu, 01 Jun 2006 13:29:45 -0700, Chris Moore wrote:
          >[color=green]
          >> I have a .NET form where I am updating a progress bar & counter. As
          >> long as the form never loses focus, everything on the form refreshs
          >> fine. But If I open another window (like Windows Explorer) and then
          >> re-select my .net form, thos fields no longer refresh. Why and ho
          >> wdo I make it start refreshing again?[/color]
          >
          > It sounds like you're accessing some of your UI controls from a worker
          > thread (the progress bar and the counter probably). UI controls must
          > be accessed from the UI thread only. If you have to access them from a
          > worker thread, use Control.Invoke or Control.BeginIn voke to marshall
          > the call to the UI thread.
          >[/color]

            Comment

            • tommaso.gastaldi@uniroma1.it
              #4
              Re: VB.NET Screen Stops Refreshing After Losing Focus??

              try putting

              Application.DoE vents()

              within the loop

              -tom

              Chris Moore ha scritto:
              [color=blue]
              > Mehdi <vioccc@REMOVEM E.gmail.com> wrote in
              > I have no idea what you just said, sorry. What I have is 1 form with a
              > button, progress bar & label on it. When I run it, I press the button
              > that then calls a procedure (that is in the form) to process some records
              > and update the controls.
              >
              > What am I missing or not understanding?
              >
              > Thanks
              >
              > news:heawgmahab xx.zuvwiijdairp .dlg@40tude.net :
              >[color=green]
              > > On Thu, 01 Jun 2006 13:29:45 -0700, Chris Moore wrote:
              > >[color=darkred]
              > >> I have a .NET form where I am updating a progress bar & counter. As
              > >> long as the form never loses focus, everything on the form refreshs
              > >> fine. But If I open another window (like Windows Explorer) and then
              > >> re-select my .net form, thos fields no longer refresh. Why and ho
              > >> wdo I make it start refreshing again?[/color]
              > >
              > > It sounds like you're accessing some of your UI controls from a worker
              > > thread (the progress bar and the counter probably). UI controls must
              > > be accessed from the UI thread only. If you have to access them from a
              > > worker thread, use Control.Invoke or Control.BeginIn voke to marshall
              > > the call to the UI thread.
              > >[/color][/color]

                Comment

                • ods
                  #5
                  Re: VB.NET Screen Stops Refreshing After Losing Focus??

                  That appears to have corrected it.

                  Thanks.


                  tommaso.gastald i@uniroma1.it wrote in
                  news:1149198501 .107577.129780@ y43g2000cwc.goo glegroups.com:
                  [color=blue]
                  > try putting
                  >
                  > Application.DoE vents()
                  >
                  > within the loop
                  >
                  > -tom
                  >
                  > Chris Moore ha scritto:
                  >[color=green]
                  >> Mehdi <vioccc@REMOVEM E.gmail.com> wrote in
                  >> I have no idea what you just said, sorry. What I have is 1 form with
                  >> a button, progress bar & label on it. When I run it, I press the
                  >> button that then calls a procedure (that is in the form) to process
                  >> some records and update the controls.
                  >>
                  >> What am I missing or not understanding?
                  >>
                  >> Thanks
                  >>
                  >> news:heawgmahab xx.zuvwiijdairp .dlg@40tude.net :
                  >>[color=darkred]
                  >> > On Thu, 01 Jun 2006 13:29:45 -0700, Chris Moore wrote:
                  >> >
                  >> >> I have a .NET form where I am updating a progress bar & counter.
                  >> >> As long as the form never loses focus, everything on the form
                  >> >> refreshs fine. But If I open another window (like Windows
                  >> >> Explorer) and then re-select my .net form, thos fields no longer
                  >> >> refresh. Why and ho wdo I make it start refreshing again?
                  >> >
                  >> > It sounds like you're accessing some of your UI controls from a
                  >> > worker thread (the progress bar and the counter probably). UI
                  >> > controls must be accessed from the UI thread only. If you have to
                  >> > access them from a worker thread, use Control.Invoke or
                  >> > Control.BeginIn voke to marshall the call to the UI thread.
                  >> >[/color][/color]
                  >
                  >[/color]

                    Comment

                    • tommaso.gastaldi@uniroma1.it
                      #6
                      Re: VB.NET Screen Stops Refreshing After Losing Focus??

                      good.
                      Applications are like humans, sometimes they need to breath :)

                      -tom

                      ods ha scritto:
                      [color=blue]
                      > That appears to have corrected it.
                      >
                      > Thanks.
                      >
                      >
                      > tommaso.gastald i@uniroma1.it wrote in
                      > news:1149198501 .107577.129780@ y43g2000cwc.goo glegroups.com:
                      >[color=green]
                      > > try putting
                      > >
                      > > Application.DoE vents()
                      > >
                      > > within the loop
                      > >
                      > > -tom
                      > >
                      > > Chris Moore ha scritto:
                      > >[color=darkred]
                      > >> Mehdi <vioccc@REMOVEM E.gmail.com> wrote in
                      > >> I have no idea what you just said, sorry. What I have is 1 form with
                      > >> a button, progress bar & label on it. When I run it, I press the
                      > >> button that then calls a procedure (that is in the form) to process
                      > >> some records and update the controls.
                      > >>
                      > >> What am I missing or not understanding?
                      > >>
                      > >> Thanks
                      > >>
                      > >> news:heawgmahab xx.zuvwiijdairp .dlg@40tude.net :
                      > >>
                      > >> > On Thu, 01 Jun 2006 13:29:45 -0700, Chris Moore wrote:
                      > >> >
                      > >> >> I have a .NET form where I am updating a progress bar & counter.
                      > >> >> As long as the form never loses focus, everything on the form
                      > >> >> refreshs fine. But If I open another window (like Windows
                      > >> >> Explorer) and then re-select my .net form, thos fields no longer
                      > >> >> refresh. Why and ho wdo I make it start refreshing again?
                      > >> >
                      > >> > It sounds like you're accessing some of your UI controls from a
                      > >> > worker thread (the progress bar and the counter probably). UI
                      > >> > controls must be accessed from the UI thread only. If you have to
                      > >> > access them from a worker thread, use Control.Invoke or
                      > >> > Control.BeginIn voke to marshall the call to the UI thread.
                      > >> >[/color]
                      > >
                      > >[/color][/color]

                        Comment

                        • OC
                          #7
                          Re: VB.NET Screen Stops Refreshing After Losing Focus??

                          Good grief! I've Googled high and low for this answer. I

                          've been developing Web apps for so long I'd forgotten how to do this.
                          I know this is not the way I used to do it but this is far easier.
                          Thank you so much!

                          -Olice

                            Comment

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