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- Option Explicit
-
- Global UserName$
- Global Password$
- Global Connect$
- Global DatabaseName$
-
- Global OraSession As Object
- Global OraDatabase As Object
-
- ' Show parameters
- Global Const MODAL = 1
- Global Const MODELESS = 0
-
- Sub CenterForm (f As Form)
-
- ' Center the specified form within the screen
-
- f.Move (Screen.Width - f.Width) \ 2, (Screen.Height - f.Height) \ 2
-
- End Sub
-
- Sub FillLists ()
-
- Dim SQL$
-
- Dim mydyn As Object
-
- ' load the categories list box
-
- ' create a dynaset of the quote categories
- SQL$ = "select category from qcats order by category"
- Set mydyn = OraDatabase.DbCreateDynaset(SQL$, 0&)
- mydyn.DbMoveFirst
-
- ' start with an "any"
- frmQuote.catlist.AddItem "any"
- frmQuote.catlist.ListIndex = 0
-
- While (0 = mydyn.EOF)
- frmQuote.catlist.AddItem mydyn.Fields("category")
- mydyn.DbMoveNext
- Wend
-
-
- ' load the person list box
-
- ' create a dynaset of the quote categories
- SQL$ = "select pname from qpersons order by pname"
- Set mydyn = OraDatabase.DbCreateDynaset(SQL$, 0&)
- mydyn.DbMoveFirst
-
- ' start with an "any"
- frmQuote.perlist.AddItem "any"
- frmQuote.perlist.ListIndex = 0
-
- While (0 = mydyn.EOF)
- frmQuote.perlist.AddItem mydyn.Fields("pname")
- mydyn.DbMoveNext
- Wend
-
- End Sub
-
- Sub QueryQuotes ()
-
- Dim where$, SQL$
-
- ' construct a new sql statement
-
- where$ = "" ' where clause
-
- ' when we have a constraint we enforce it by using a where clause
- ' the where clause uses sub-queries to translate the constraints from
- ' the user-friendly information (such as category name) to the numeric index
- ' that is used as a key between the tables
-
- If frmQuote.catlist.ListIndex <> -1 And frmQuote.catlist <> "any" Then
- ' category constraint
- where$ = " where quotes.catnum = (select catnum from qcats where category = '"
- where$ = where$ + frmQuote.catlist
- where$ = where$ + "')"
- End If
- If frmQuote.perlist.ListIndex <> -1 And frmQuote.perlist <> "any" Then
- ' person constraint
- If Len(where$) = 0 Then
- ' first where clause
- where$ = " where "
- Else
- ' subsequent where clause
- where$ = where$ + " and "
- End If
- where$ = where$ + "quotes.pnum = (select pnum from qpersons where pname = '"
- where$ = where$ + frmQuote.perlist
- where$ = where$ + "')"
- End If
-
- ' now put together the sql statement
- SQL$ = "select * from quotes" + where$
-
- ' Refresh the data control
- ' form2.TheQuote = ""
- frmQuote.quotedata.RecordSource = SQL$
- frmQuote.quotedata.Refresh
-
- If frmQuote.quotedata.Recordset.RecordCount < 1 Then
- frmQuote.TheQuote.Visible = False
- frmQuote.cmdDeleteQuote.Enabled = False
- Else
- frmQuote.TheQuote.Visible = True
- frmQuote.cmdDeleteQuote.Enabled = True
- End If
-
- End Sub
-
-