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Modifying Views
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28/09/2004 00:41:31
 
 
À
27/09/2004 23:52:58
Joel Leach
Memorial Business Systems, Inc.
Tennessie, États-Unis
Information générale
Forum:
Visual FoxPro
Catégorie:
The Mere Mortals Framework
Titre:
Divers
Thread ID:
00946522
Message ID:
00946538
Vues:
24
>Hi June,
>
>>If I've got a parameterized view where sometimes I want to use field1 as the comparison for the parameter, and sometimes I want to use field2 (with a different value for the parameter), how do I do this with MM? Do I have to create two views, identical except for the filter tab, or is there some other way? Is there a way to use views created at run time with MM?
>>
>
>I don't use MM, but can you create one view with filters on both fields? Then, set one of the filter variables to a wildcard (or empty string) when you are not using it. In other words:
>
>lcParameter1 = "FilterValue"
>lcParameter2 = ""
>Select * from MyTable where Field1 = ?lcParameter1 and Field2 = ?lcParameter2
>
>Swap the values for the variables when you want to filter on Field2.

Hi Joel,

The above select statement is dependent on SET ANSI = OFF since field2 = "" will be TRUE in that case but will be FALSE if SET ANSI = ON. One way that I do this is
*!* select on field 1
lcParameter1 = "FilterValue"
lcParameter2 = "SOME BOGUS VALUE THAT WILL NEVER MATCH"
Select * from MyTable where Field1 = ?lcParameter1 OR Field2 = ?lcParameter2

*!* select on field 2
lcParameter1 = "SOME BOGUS VALUE THAT WILL NEVER MATCH"
lcParameter2 = "FilterValue"
Select * from MyTable where Field1 = ?lcParameter1 OR Field2 = ?lcParameter2
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