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Sorting/Indexing a Buffered Cursor
Message
De
28/01/2006 16:43:52
 
 
À
28/01/2006 15:56:40
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Divers
Thread ID:
01091159
Message ID:
01091206
Vues:
12
>>Hi!
>>
>>I have a grid class which allows users to sort any column (asc or desc) by clicking on it. Internally it creates an index on the fly and handles row/table buffering etc.
>>
>>All this works fine but how do I handle sorting/indexing columns in a table buffered cursor with modified rows (uncommitted changes)?
>>
>>The users do not want to save the changes first but add, change data, sort on different columns, have a look at the data and then decide if they want to save the changes or not.
>>
>>I would prefer not to create an index on every column in the table as there are many columns.
>>
>>Sarosh
>
>this is a dynamic column index with table buffer support,
>the only issue is the public variable
>
>CREATE CURSOR dynindex (f1 i,f2 i)
>FOR k=1 TO 100
> INSERT INTO dynindex VALUES (RAND()*10000,RAND()*10000)
>NEXT
>g_indexexp = ".T."
>INDEX ON EVAL(m.g_indexexp) TAG TCOLUMN
>CURSORSETPROP("Buffering",5)
>BROWSE NORMAL
>g_indexexp = FIELD(1)
>REINDEX
>BROWSE NORMAL
>g_indexexp = FIELD(2)
>REINDEX
>BROWSE NORMAL
>
Fabio, I just tryed this and on REINDEX I get an error message:
"Command cannot be issued on a Table with Cursors in Table Buffering mode". Just change some values when first browse appears.
Against Stupidity the Gods themselves Contend in Vain - Johann Christoph Friedrich von Schiller
The only thing normal about database guys is their tables.
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