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Passing Params in Form Classes
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À
17/04/2007 04:55:37
Cetin Basoz
Engineerica Inc.
Izmir, Turquie
Information générale
Forum:
Visual FoxPro
Catégorie:
Classes - VCX
Divers
Thread ID:
01216407
Message ID:
01216680
Vues:
13
>>Hi Gang.
>>
>>I have 2 form classes.
>>
>>FormA class and FormB class
>>
>>I have FormA instantiated. It has a property called p_module to track any FormB that may be instantiated from FormA.
>>
>>Then, when I press a button on FormA, I instantiate FormB from FormB class....
>>
>>Thisform.p_module = CREATEOBJECT("FormB") ......( where Thisform is FormA ).
>>
>>Then I run the code right after instantiating FormB...
>>
>>
>>IF TYPE("Thisform.p_module") = "O"
>>	Thisform.p_module.show()
>>ENDIF
>>
>>
>>Now I can see FormB
>>
>>When FormB is up, I use it to select a value from a table and THEN I want to send it back to the calling FormA (when closing the FormB)
>>
>>Since these are class forms, how can I send the value from FormB back to FormA?
>>
>>
>>Thanks!
>
>According to your code, FormA already has a reference to FormB. So FormB do not need anything to send 'back'. FormA can access public PEM on formB. However you'd need a little adjustment in your code:
>
>1) Call formB as a modal form so it waits for it to finish.
>Thisform.p_module.show(1)
>
>2) Do not release but just hide formB to let the code continue following show(1) line. Then formB can read whatever it wants from formB (so formB in a sense is not bound to send back a single variable - this works great when you need to collect multiple information from user. ie: startdate,enddate,customer ID etc)
>
>The downside is callers of formB should know its objects (not a blackbox form where you send a parameter and receive a parameter back). Might be acceptable in many cases.
>Cetin

Thanks! Good info!
Tommy Tillman A+ NetWork+ MCP
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