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Clearing of fields in a Web dialog control

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    Clearing of fields in a Web dialog control

    Hello,

    I got my dialog designed and working now, but I noticed that when I display the dialog later by linking to it from another page, the contents of the controls are still there. Do I need to clear them, or can this be done automatically based on some setting that affects all controls?

    TIA,
    Ragnar Midtskogen

    #2
    RE: Clearing of fields in a Web dialog control

    Ragnar,

    Please post your Web Application Server questions on the Web Application Server board.

    There are a few reasons what you are describing could happen:

    1) The link includes a query string with values for the controls in it. If this is the case, remove that portion of the query string.

    2) The dialog is using sessions variables which still exist and are therefore displayed. Do not use session variables unless necessary. If necessary, you'll need to clear these variables before displaying the page again. This could be done in your dialogs initialization code or as part of your hyperlink.

    3) Your browser is displaying a cached page instead of the page sent by the server. The headers sent by the server by default should prevent this, but you can add the following 3 lines of Xbasic to further prevent caching of your pages

    Response.AddHeader("CacheControl: no-cache")
    Response.AddHeader("Pragma: no-cache")
    Response.AddHeader("Expires: -1")


    -Lenny

    Lenny Forziati
    Vice President, Internet Products and Technical Services
    Alpha Software Corporation

    Comment


      #3
      RE: Clearing of fields in a Web dialog control

      Thank you Lenny,

      1. No, I do not pass the values.

      2. I do use server variables, copying them from the dialog controls, in order to mak them available to the page I link to from the AfterValidate event code. Do you recommend passing them to that page?
      But I don't see how this would cause the values to appear when the page with the dialog on it are reloaded.

      3. I will try your AddHeader code.

      Ragnar Midtskogen

      Comment


        #4
        RE: Clearing of fields in a Web dialog control

        For number 2, I highly doubt you want server variables. They will be visible to all users of the application, not just the current user. A session variable will at least be restricted to the current user. Can you post a copy of your component?

        Lenny Forziati
        Vice President, Internet Products and Technical Services
        Alpha Software Corporation

        Comment


          #5
          RE: Clearing of fields in a Web dialog control

          Hi Lenny,

          It occurred to me I am not sure where to add that code.

          I tried adding it to the Activate event of the dialog, did not like that, got this error message:
          Errors in: event.Activate code:
          Response.AddHeader method not found

          I am not much up on HTML, know a little about ASP, but for the most part I am an experienced VB/VBA and Access with a little SQL Server, programmer.

          I attended last year's Alpha conference and took some classes, but have not used it since, so I am fumbling.

          Ragnar

          Comment


            #6
            RE: Clearing of fields in a Web dialog control

            I'm sorry, I meant session variables.

            Ragnar

            Comment


              #7
              RE: Clearing of fields in a Web dialog control

              Lenny,

              Here is the component

              Ragnar

              Comment


                #8
                RE: Clearing of fields in a Web dialog control

                Lenny,

                And they were the problem, when I clear them all is well. John Bowen explained why.

                Ragnar

                Comment


                  #9
                  Re: Clearing of fields in a Web dialog control

                  Ragnar,

                  I'm new to dialogs and encountered the problem you described. I'm using local variables, but they stayed on the page after I clicked "submit." I added this code that solved the problem. I'm sure "real" programmers won't like it, but it worked for me, as far as I can tell.

                  'Clear the values of the existing variables


                  dim SwimNum as c
                  dim Choice1 as c
                  dim choice2 as c
                  dim choice3 as c
                  dim choice4 as c

                  swimnum = ""
                  choice1 = ""
                  choice2 = ""
                  choice3 = ""
                  choice4 = ""

                  Thank you.

                  --Rob

                  Comment

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