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FORCE NUMERIC NOT EQUAL "BLANK"

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  • FORCE NUMERIC NOT EQUAL "BLANK"

    I HAVE A SITUATION WHERE I NEED TO ENTER NUMBER DIRECTLY INTO A FIELD ON A FORM. THIS WORKS VERY WELL AND SINCE THERE ARE MORE THAN 10 FIELD THAT THE USER NEED TO ENTER QTY VALUE///

    THE FIELD ITSELF IS A "NUMERIC"

    AFTER CAREFUL INVESTIGATION ON APPLICATION CRASHES//

    I DISCOVERED THAT WHEN SOMEONE ENTER A BLANK INTO THE FIELD INTENTIONALLY ? THE APPLICATION WILL EVENTUALLY CRASH ALONG WITH OTHER OPERATION COMBINATIONS OF KEY STROKES.

    I OPT THE IDEA TO PUT CODE WITHIN THE FIELD_RULE OF THE TABLE'S FIELDRULE'S EVENTS

    CANWRITEFIELD....

    IF A_FIELD_VALUE=""
    A_FIELD_VALUE=0
    END IF

    ETC....

    THAT DOESNOT SEEMS TO MAKE ANY DIFFERENCE
    WHEN I ENTER BLANK INTO THAT PARTICULAR NUMERIC FIELD
    IT STILL REMAIN "BLANK"

    YOUR ADVICE AMD REMEDY IS GREATLY APPRECIATED
    THANKS
    KEN TJIA

  • #2
    RE: FORCE NUMERIC NOT EQUAL

    Ken,

    Not sure I can be of any help, but check out the MATH_NAN costant in Xbasic.

    Here is something Cian Chambliss posted a while ago, that may get you started:

    Msg ID: 34378
    Subject:
    RE: Numeric 0 vs. numeric blank
    Author: cian chambliss
    Date: 01-29-2001 09:27
    File: Unitialized numeric fields in A5 contain the value of non-a-number
    (represented by the constant MATH_NAN) -- here is an example done in
    the a5v4 script editor interactive window:

    x = 0
    ? isblank("var->x")
    = .F.


    x = math_nan

    ? isblank("var->x")
    = .T.

    Comment


    • #3
      RE: FORCE NUMERIC NOT EQUAL

      IF FIELD="" IS NULL

      TRY IF FIELD=" " WITH A BLANK BETWEEN QUOTES

      BOB

      Comment


      • #4
        RE: FORCE NUMERIC NOT EQUAL

        Hi Ken,

        Could you somehow force a zero into the field if it is blank, perhaps testing the text property of the control on the form. I believe even controls bound to numeric fields have a text property: the characters in the control as opposed to the value in the field.

        On departing the field if controlname.text="" set it to "0".

        Bill
        Bill Hanigsberg

        Comment


        • #5
          RE: FORCE NUMERIC NOT EQUAL

          Have you tried to give the field a default value of 0.00. A nul value has a character value and therefore cannot be calculated with numbers.

          Keith Hubert
          London.
          Regards
          Keith Hubert
          Alpha Guild Member
          London.
          KHDB Management Systems
          Skype = keith.hubert


          For your day-to-day Needs, you Need an Alpha Database!

          Comment


          • #6
            RE: FORCE NUMERIC NOT EQUAL

            You can also force a zero by using the OnDepart action event for the field on the form. This will change an entered space to a numeric zero.


            VMODE=YOUR_FORM_NAME.MODE_GET() 'get entry mode-script will not fire in view mode
            SELECT
            CASE VMODE="ENTER".OR.VMODE="CHANGE"
            TBL=TABLE.CURRENT()
            IF TBL.YOUR_FIELD_NAME=0
            TBL.YOUR_FIELD_NAME=0
            YOUR_FIELD_NAME.REFRESH()
            END
            END IF
            END SELECT

            Mick

            Comment


            • #7
              RE: FORCE NUMERIC NOT EQUAL

              try

              if a_field_value="" then
              a_field_value="0"
              end if

              Comment

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