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Part 1: Part Title
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Part 5: Automating an Access Application
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Set an error trap On Error GoTo Insert_Err Save the Product ID lngProduct = Me.ContactEventTypeID.Column(5) Fetch the product record Set rst = CurrentDb.OpenRecordset("SELECT * FROM tblProducts " & _ "WHERE ProductID = " & lngProduct) Make sure we got a record If rst.EOF Then MsgBox "Could not find the product record for this sales event." & _ " Auto-create of " & _ "product record for this contact has failed.", _ vbCritical, gstrAppTitle rst.Close Set rst = Nothing GoTo Insert_Exit End If Check for prerequisite product If Not IsNull(rst!PreRequisite) Then Make sure contact owns the prerequisite product If IsNull(DLookup("ProductID", "tblContactProducts", _ "ProductID = " & rst!PreRequisite & " And ContactID = " & _ Me.Parent.ContactID)) Then Get the name of the prerequisite strPreReqName = DLookup("ProductName", "tblProducts", _ "ProductID = " & rst!PreRequisite) Display error MsgBox "This contact must own prerequisite product " & _ strPreReqName & " before you can sell this product." & _ vbCrLf & vbCrLf & _ "Auto-create of product record for this contact has failed", _ vbCritical, gstrAppTitle Bail rst.Close Set rst = Nothing GoTo Insert_Exit End If End If Save the price curPrice = rst!UnitPrice Done with the record - close it rst.Close Set rst = Nothing Now, find the default company for this contact varCoID = DLookup("CompanyID", "qryContactDefaultCompany", _ "ContactID = " & Me.Parent.ContactID.Value) If not found, then disallow product sale If IsNothing(varCoID) Then MsgBox "You cannot sell a product to a Contact who does not have a " & _ "related Company that is marked as the default for this Contact.", _ vbCritical, gstrAppTitle GoTo Insert_Exit End If Set up the INSERT command
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Part 5: Automating an Access Application
Microsoft Office Access 2003 Inside Out
strSQL = "INSERT INTO tblContactProducts " & _ "(CompanyID, ContactID, ProductID, DateSold, SoldPrice) " & _ "VALUES(" & varCoID & ", " & Me.Parent.ContactID & ", " & _ lngProduct & ", #" & _ DateValue(Me.ContactDateTime) & "#, " & curPrice & ")" Attempt to insert the Product row CurrentDb.Execute strSQL, dbFailOnError Got a good add - inform the user MsgBox "The product you sold with this event " & _ "has been automatically added " & _ "to the product list for this user. " & _ "Click the Products tab to verify the price.", _ vbInformation, gstrAppTitle Requery the other subform to get the new row there Me.Parent.fsubContactProducts.Requery End If Insert_Exit: Exit Sub Insert_Err: Was error a duplicate row If Err = errDuplicate Then MsgBox "LawTrack Contacts attempted to auto-add " & _ "the product that you just indicated " & _ "that you sold, but the Contact appears " & _ "to already own this product. Be sure " & _ "to verify that you haven t tried to sell the same product twice.", _ vbCritical, gstrAppTitle Else MsgBox "There was an error attempting to auto-add " & _ "the product you just sold: " & _ Err & ", " & Error, vbCritical, gstrAppTitle Log the error ErrorLog Me.Name & "_FormAfterUpdate", Err, Error End If Resume Insert_Exit End Sub
Part 1: Part Title
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In the Declarations section of the module, you can find two variables that the event procedures use to pass information between events. (If you declare the variables inside one of the procedures, only that procedure can use the variables.) The Before Update event procedure for the contact event type checks to see if the event is a product sale (by examining one of the hidden columns in the combo box row source). If the user is trying to log a product sale and this particular contact doesn t have a default company defined, the code displays an error message and won t let the user save that event type. Remember, a record in the tblContactProducts table must have a CompanyID as well as a ContactID. When the user attempts to save a new or changed event record, Access runs the form s Before Update event procedure. This code again checks to see if the record about to be saved is for a product sale. However, if this isn t a new record or the user is saving an old event record but didn t change the event type, the code exits because it doesn t want to add a product record twice. (If this is an existing record and the event type didn t change, this code probably created the companion contact product record the first time the user saved the record.) The 912
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