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Object.Fetch ....

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    Object.Fetch ....

    Hi all,

    My application features a browse (DocsBrowse) which shows a list of documents, where the Docs are related to a given Job number.

    In this case (see attached), I have 4 documents which relate to Job no. 0000001.

    I'd like the user to be able to select from the list, the documents they would like to attach to an email.

    So far so good - the docs attached to an given Job no. display just fine, and the user can click in the browse to choose to attach any doc(s).


    I now want to scan the browse object to pick up the file names of any docs the user wants to attach, building a comma separated list.

    To scan the records, my first thought was to use a table version of fetch_find, which uses a While / Wend loop, and the EOF function - e.g. while .not. eof("Documents") to stop when it's had enough.

    ... but then I noticed that Alpha provides Object based fetch commands ...

    Fetch Commands.JPG

    Even better - Starting with the "DocsBrowse.Fetch_First" method, I can construct a loop through the browse, nudging forward a record at a time (using "DocsBrowse.Fetch_Next").

    But ... how do I know when the loop has reached / the end of the table (In my instance, on the 4th record) ?

    There doesn't seem to be an EOF equivalent for the Object.Fetch ... set of methods.

    Help / comments etc. greatly appreciated as always.

    Re: Object.Fetch ....

    That is correct.

    So what I've done is to do a fetch_last - record a unique value for the last record in a variable

    the start a fetch_first and a while loop of fetch_next until the unique value is found - ie on the last record of the browse.

    It's also helpful to stop the refresh of the browse while looping. ui_freeze()
    Al Buchholz
    Bookwood Systems, LTD
    Weekly QReportBuilder Webinars Thursday 1 pm CST

    Occam's Razor - KISS
    Normalize till it hurts - De-normalize till it works.
    Advice offered and questions asked in the spirit of learning how to fish is better than someone giving you a fish.
    When we triage a problem it is much easier to read sample systems than to read a mind.
    "Make it as simple as possible, but not simpler."
    Albert Einstein


      Re: Object.Fetch ....

      You could use

      recs= docsbrowse.records_get()

      and then use a for ... next loop.
      There can be only one.


        Re: Object.Fetch ....

        Hi Stan and Al,

        Whenever I post a query, I can always count on you two to respond - thanks !

        I spent some time looking in the Documentation section for what I thought I'd missed - namely some form of EOF() for a browse control - before giving up and looking for a workaround.

        My thoughts (much as your did), ran to finding the boundary for a loop process.

        I though of using Al's approach - checking for the last record value - but thought it would be easier to count the records then use a FOR x = 1 to "Recs" loop.

        To count the records, I tried using Docsbrowse.records_get() but it produced some strange results that I couldn't tally to my database records, and I lost confidence in it.

        I finally settled on using "a5_get_records_in_query()" which gives a reliable count of the records for a given job number - then used the FOR..NEXT loop as above.

        Al's suggestion of using "ui_freeze()" was also very solid, ta.

        Anyway, I thought this would be a good wrap up, should anyone else be tempted to try processing a browse instead of using the normal table method.

        Thanks to all for looking !