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Trouble with User defined function

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  • Trouble with User defined function

    I have created a user defined function that is type L with one variable that also gets passed to it, ie - the table name.

    It looks to see if a table rule is in place. This all works but I cannot get the function to return as true. It always returns as false. So basically I do not know where the function is getting its true or false result from.

    Code:
    FUNCTION SX_Check_TR AS L (dbname AS C )
    dim global frcheck as c = ""
    	dbname = dbname+".dbf"
    	dim tbl as P
    dim tbr as P
    tbl = table.open(dbname)
    tbr = tbl.rules_get()
    frcheck=tbr.Code.CanEnterRecord
    if frcheck = "SX_reg(sx_pswd,sx_co_name)" then
    	.T.
    	else 
    	.F.
    end if 
    END FUNCTION

    When run I get these results.

    Code:
    ?SX_Check_TR("test_tbl")
    = .F.
    
    ?frcheck
    = "SX_reg(sx_pswd,sx_co_name)"

  • #2
    Re: Trouble with User defined function

    Shouldn't that be

    Code:
    FUNCTION SX_Check_TR AS L (dbname AS C )
    dim global frcheck as c = ""
    	dbname = dbname+".dbf"
    	dim tbl as P
    dim tbr as P
    tbl = table.open(dbname)
    tbr = tbl.rules_get()
    frcheck=tbr.Code.CanEnterRecord
    if frcheck = "SX_reg(sx_pswd,sx_co_name)" then
    	[COLOR="#FF0000"]SX_Check_TR = [/COLOR].T.
    	else 
    	[COLOR="#FF0000"]SX_Check_TR = [/COLOR].F.
    end if

    Comment


    • #3
      Re: Trouble with User defined function

      Code:
      FUNCTION SX_Check_TR AS L (dbname AS C )
      dim global frcheck as c = ""
      	dbname = dbname+".dbf"
      	dim tbl as P
      dim tbr as P
      tbl = table.open(dbname)
      tbr = tbl.rules_get()
      frcheck=tbr.Code.CanEnterRecord
      tbl.close() [COLOR="#FF0000"]'don't leave table open[/COLOR]
      if frcheck = "SX_reg(sx_pswd,sx_co_name)" then
      	SX_Check_TR = .T.
      	else 
      	SX_Check_TR = .F.
      end if
      If SX_reg(sx_pswd,sx_co_name) executes the function sx_req() then it shouldn't be quoted in
      if frcheck = "SX_reg(sx_pswd,sx_co_name)" then
      There can be only one.

      Comment


      • #4
        Re: Trouble with User defined function

        Thanks,

        Duh is me.. I tried that but put the function brackets on the end which did not work.

        SX_Check_TR() = .T. is what I had tried that did not work. Never thought about removing the () but it now works.

        Thanks again Jon.

        Comment


        • #5
          Re: Trouble with User defined function

          Originally posted by Stan Mathews View Post
          Code:
          FUNCTION SX_Check_TR AS L (dbname AS C )
          dim global frcheck as c = ""
          	dbname = dbname+".dbf"
          	dim tbl as P
          dim tbr as P
          tbl = table.open(dbname)
          tbr = tbl.rules_get()
          frcheck=tbr.Code.CanEnterRecord
          tbl.close() [COLOR="#FF0000"]'don't leave table open[/COLOR]
          if frcheck = "SX_reg(sx_pswd,sx_co_name)" then
          	SX_Check_TR = .T.
          	else 
          	SX_Check_TR = .F.
          end if
          If SX_reg(sx_pswd,sx_co_name) executes the function sx_req() then it shouldn't be quoted in
          if frcheck = "SX_reg(sx_pswd,sx_co_name)" then

          Good point on the tbl.close

          The SX_reg(sx_pswd,sx_co_name) will be run from with the table even rules. The SX_Check_TR("TableName") will be run on app startup to verify that the end user has not tried to modify or remove the table event rule.

          Most will not go and download a trial of Alpha to try and defeat my registration system, but there may be a few that will.

          All of these functions will go into a .AEX that is not part of the apps .AEX but will be loaded in the autoexec using load_library(). If they try and remove the .AEX from the directory the app will give them a nice warning message and then shut down.


          As usual, Thanks Stan..

          Comment

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