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auto numbering

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    auto numbering

    Hello...I am very much a newbie when it comes to writing scripts. I have created several databases using the wizards. I want to create a file management database that will track where files are stored (in file cabinets). I have a location code, numeric 3 in length (ex, 10, 20, 30) a sub category code, numeric 3 in length (ex, 10, 20, 30) and a file number (auto increment).
    I want the file number to be the location code + the sub category code + the file number. Is there an easy way to accomplish this?? Ex: for location code 10, category code 20, file number1 :the file number would be 01002000001, 01002000002, etc


    RE: auto numbering


    I'm a "know nothing at all" when it comes to xbasic. I'm sure you'll get many great way's to handle this. There's quite a few talented people that frequent this board.

    But, I think that I may have a solution for you, and I'm really glad to be able to offer my help. (Returnt the favor)

    I'd include another field in the database. Let's say you call it COMB_CODE, for combination code, or call it what you like.

    I'd set the 3 fields you already have, and the new one, to be character fields. I'd then set the Field Rule for the 4th field COMB_CODE to be calculated with the following calc statement.


    If location=50, subcat=60, and filenum=00001, then comb_code would = 506000001.

    Give it a shot.

    Thank you,
    Mike Konoff


      RE: auto numbering

      Hi Rose:
      I would create another field numeric 10 in length and then concatenate the first three fields into that field. You can do that using field rules, so you won't have to use any scripting.

      Hope that helps.


      Dan Blank builds Databases
      Skype: danblank


        RE: auto numbering

        Hi Rose
        The filenumber field will have to be a character field if you you want the value to be able to start with a zero. Heres one way to do it:


        You have to turn the numerics to characters, set how long you want the string to be, and then set how you want it padded. PadL means put whatever to the left of my value, and put as many of whatever to make it the length I want. So in the first part, its padding with "0", and adding as many zeros as needed to make the value 3 characters. If the loc_code was 100, there would be no leading zero. If its 2, then it returns 002. and so forth...



          RE: auto numbering

          Thanks a million Mike ....I will give it a try!


            RE: auto numbering


            First, I would recommend changing the "Numeric,3,0" fields to "Character 3". This will allow you to have values like "020". Otherwise, if you enter "020" you will get "20" and it will be difficult to get the output you want. The general rule is, "If you aren't going to do math with it, use a character field." The character field can have a mask which allows only numbers. (Use # as the mask character.)

            Same for the auto-incremented file number - make it a character field. The first value might be "000001" or any other starting number you want but be sure there is a character in every position; ie, use leading zeros if necessary until all positions are filled. (You don't strictly have to do this but, if not, you will have a much harder time getting a consistent output string.

            Finally, decide where you need to have the completed File Number and how it will be used. If you only need to display it on forms and/or reports (this is often the case) then you don't need to store it as a separate field. You can simply define a calculated 'field' object on each form/report which is:
            location_code + sub_category + file_number

            Also, if you want to sort by the total number, you could simply define the index/query to be the sum of the 3 fields. Sorting of the component numbers will work just like a numeric sort IF you include the preceding zeros (see below for more about this).

            If you really feel the need to store the actual value in the table, just define a calculated field using the same expression as above. (You may have noticed that I don't think this should be necessary - it's just a waste of 'not very valuable any more' hard drive space in my mind.)

            Here's another reason to define the fields as characters! If you used numeric values, you would need an equation like this:
            padl( ltrim(str(location_code)), 3, "0" )
            just to convert the location_code field - then do the same to all the rest and add them together!

            Preceding zeros: If you are concerned about the user forgetting to enter preceding zeros, you can solve this with a simple "CanWriteField" event in the field rules:

            DIM GLOBAL a_field_value as c
            a_field_value = padl( trim(a_field_value), 3, "0" )

            This will convert "1 " (a "1" typed in the first position only) to "001", etc.


              RE: auto numbering

              Wow! There were no answers when I started my response and there were already 4 others when I got done!


                RE: auto numbering

                lol... our little fingers are still smoking! (humming the theme from Bonanza)


                  RE: auto numbering

                  Thanks to heros!!!