Worker thread questions

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    #1

    Worker thread questions

    I'm reading about Threads but there is so much to understand I don't know
    where to spend my time.

    I want a worker thread to populate a list box.

    I'd like:

    The main thread to be able to abort the process if it wants to.
    The contents of the list box to show the progress.

    Do I need to study any or all the following:

    Polling for Asynchronous Call Completion
    Waiting for an Asynchronous Call with EndInvoke
    Executing a Callback Method When an Asynchronous Call Completes
    Waiting for an Asynchronous Call with WaitHandle


    I found many examples but am not sure which one corresponds to my needs.
    Is there an example of what I described?

    Thanks in advance



    Tags: None
    • Harry Strybos
      #2
      Re: Worker thread questions

      " active" <activeNOSPAM @a-znet.comwrote in message
      news:efsmQPTfHH A.2216@TK2MSFTN GP03.phx.gbl...
      I'm reading about Threads but there is so much to understand I don't know
      where to spend my time.
      >
      I want a worker thread to populate a list box.
      >
      I'd like:
      >
      The main thread to be able to abort the process if it wants to.
      The contents of the list box to show the progress.
      >
      Do I need to study any or all the following:
      >
      Polling for Asynchronous Call Completion
      Waiting for an Asynchronous Call with EndInvoke
      Executing a Callback Method When an Asynchronous Call Completes
      Waiting for an Asynchronous Call with WaitHandle
      >
      >
      I found many examples but am not sure which one corresponds to my needs.
      Is there an example of what I described?
      >
      Thanks in advance
      >
      >
      I have been having a lot of success with component classes. Essentially, a
      component class allows all you describe. It also reports progress and allows
      for aborting the process.

      It is outside the scope of this forum to give you a detailed insight into
      component classes. However, this may give you a good place to start.
      Component classes are also excellent for code re-use.

      Cheers


        Comment

        • Tom Shelton
          #3
          Re: Worker thread questions

          On Apr 12, 12:53 pm, " active" <activeNOS... @a-znet.comwrote:
          I'm reading about Threads but there is so much to understand I don't know
          where to spend my time.
          >
          I want a worker thread to populate a list box.
          >
          I'd like:
          >
          The main thread to be able to abort the process if it wants to.
          The contents of the list box to show the progress.
          >
          Do I need to study any or all the following:
          >
          Polling for Asynchronous Call Completion
          Waiting for an Asynchronous Call with EndInvoke
          Executing a Callback Method When an Asynchronous Call Completes
          Waiting for an Asynchronous Call with WaitHandle
          >
          I found many examples but am not sure which one corresponds to my needs.
          Is there an example of what I described?
          >
          Thanks in advance
          I would just look at the BackgroundWorke r component if you are using
          VB2005.

          --
          Tom Shelton

            Comment

            • active
              #4
              Re: Worker thread questions

              I'll try to check this out.
              thanks

              "Harry Strybos" <harry_NOSPAM@f fapaysmart.com. auwrote in message
              news:%23ttfZkUf HHA.596@TK2MSFT NGP05.phx.gbl.. .
              >" active" <activeNOSPAM @a-znet.comwrote in message
              >news:efsmQPTfH HA.2216@TK2MSFT NGP03.phx.gbl.. .
              >I'm reading about Threads but there is so much to understand I don't know
              >where to spend my time.
              >>
              >I want a worker thread to populate a list box.
              >>
              >I'd like:
              >>
              >The main thread to be able to abort the process if it wants to.
              >The contents of the list box to show the progress.
              >>
              >Do I need to study any or all the following:
              >>
              >Polling for Asynchronous Call Completion
              >Waiting for an Asynchronous Call with EndInvoke
              >Executing a Callback Method When an Asynchronous Call Completes
              >Waiting for an Asynchronous Call with WaitHandle
              >>
              >>
              >I found many examples but am not sure which one corresponds to my needs.
              >Is there an example of what I described?
              >>
              >Thanks in advance
              >>
              >>
              I have been having a lot of success with component classes. Essentially, a
              component class allows all you describe. It also reports progress and
              allows for aborting the process.
              >
              It is outside the scope of this forum to give you a detailed insight into
              component classes. However, this may give you a good place to start.
              Component classes are also excellent for code re-use.
              >
              Cheers
              >

                Comment

                • active
                  #5
                  Re: Worker thread questions

                  I am and I will.

                  Thanks
                  "Tom Shelton" <tom_shelton@co mcast.netwrote in message
                  news:1176427130 .112631.240080@ p77g2000hsh.goo glegroups.com.. .
                  On Apr 12, 12:53 pm, " active" <activeNOS... @a-znet.comwrote:
                  >I'm reading about Threads but there is so much to understand I don't know
                  >where to spend my time.
                  >>
                  >I want a worker thread to populate a list box.
                  >>
                  >I'd like:
                  >>
                  >The main thread to be able to abort the process if it wants to.
                  >The contents of the list box to show the progress.
                  >>
                  >Do I need to study any or all the following:
                  >>
                  >Polling for Asynchronous Call Completion
                  >Waiting for an Asynchronous Call with EndInvoke
                  >Executing a Callback Method When an Asynchronous Call Completes
                  >Waiting for an Asynchronous Call with WaitHandle
                  >>
                  >I found many examples but am not sure which one corresponds to my needs.
                  >Is there an example of what I described?
                  >>
                  >Thanks in advance
                  >
                  I would just look at the BackgroundWorke r component if you are using
                  VB2005.
                  >
                  --
                  Tom Shelton
                  >

                    Comment

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