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Variable for table field

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  • Variable for table field

    It seems to me there is a way to do this:

    I want to use a variable for the table pointer and field to enter a record.
    For example:

    dim t as p
    t=table.open("Customer')
    t.enter_begin()
    t.lastname="Smith" <<<<<<<<<<<<<<<<<<
    t.enter_end()
    t.close()

    Since the field I will be writing to will change based on other criteria
    I want to replace t.lastname with an expression that would evaluate to t.lastname.

    like:
    dim fldname as c
    fldname="Firstname"

    "t."+fldname="James"

    Thanks
    JIim

  • #2
    Re: Variable for table field

    You need the eval() function.

    Code:
    tbe = tbl.open("a_email")
    ? tbe.FROM_NAME
    = "Stan Mathews                                                                                                                                                                                            "
    
    fldname = "FROM_NAME"
    ? eval("TBE."+fldname)
    = "Stan Mathews
    Sorry, misread the post. You need evaluate_template() to write to the field. The other suggestion reads/evaluates the fieldname supplied.

    Code:
    tbe = table.open("a_email_outbox")
    ? tbe.Sent_by
    = "[email protected]                                                                                                                                                                                                               "
    tbe.enter_begin()
    evaluate_template("tbe."+fldname+"="+quote("[email protected]"))
    tbe.enter_end(.t.)
    
    ? tbe.Sent_by
    = "[email protected]
    Or

    Code:
    tbe = table.open("a_email_outbox")
    ? tbe.sent_by
    = "[email protected]                                                                                                                                                                                                                                "
    fldname = "Sent_by"
    
    tbe.enter_begin()
    eval("tbe."+fldname) = "[email protected]"
    
    tbe.enter_end(.t.)
    
    ? tbe.Sent_by
    = "[email protected]
    Last edited by Stan Mathews; 04-16-2008, 02:15 PM.
    There can be only one.

    Comment


    • #3
      Re: Variable for table field

      Steve: thanks for your quick reply, but I don't think I explained myself properly. There are 24 fields in a table...M1 - M24...I will enter one record in the table putting data only in the "clientno" field. Then I need to loop 24 times, writing to the same record but to field M1 on the first loop, field M2 on the second loop and so forth thru field M24.

      dim t as p
      t=table.open("mytable')
      t.enter_begin()
      t.clientno= "000001"
      t.enter_end()
      t.close()

      dim count as n
      count=24
      Begin:
      if count=0
      goto finished
      end
      else
      '''''''''do some stuff here that will give me the criteria for the "M" number
      '''''''''and the data that needs to be written to the field

      dim t as p
      t=table.open("mytable')
      t.change_begin()
      ??????
      t.change_end()
      t.close()
      count=count-1
      goto begin
      end if
      Finished:
      end

      Where the ?????? is, I need a variable string that evaluates to
      " t.M1 = something" the first time thru
      " t.M2 = something else" the 2nd time thru etc. Otherwise I have to repeat the code 24 times. I tried using eval() but couldn't get it to work in this context.

      I hope this makes what I'm trying to do clearer.
      Thanks
      Jim

      Comment


      • #4
        Re: Variable for table field

        See how this works.

        If you are wanting to write to the record just created in the first part, remove the first t.close() and don't open and close inside the loop.
        Code:
        dim t as p
        t=table.open("mytable")
        t.enter_begin()
        t.clientno= "000001"
        t.enter_end()
        [COLOR="red"]t.close()[/COLOR]
        
        FOR count = 1 TO 24
        	'''''''''do some stuff here that will give me the criteria for the "M" number
        	thispass = "M" number derived for this loop
        	'''''''''and the data that needs to be written to the field
        	thisfldvalue = the data that needs to be written to the field
        	dim t as p
        	[COLOR="blue"]t=table.open("mytable")[/COLOR]
        	t.change_begin()
        	eval("t.M"+alltrim(str(thispass))) = thisfldvalue
        	t.change_end()
        	[COLOR="blue"]t.close()[/COLOR]
        NEXT count
        t.close() 'here's where we close
        end
        Last edited by Stan Mathews; 04-16-2008, 02:56 PM.
        There can be only one.

        Comment


        • #5
          Re: Variable for table field

          Thanks much Stan. It works like a charm!!

          Jim

          Comment

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