Index / Order in CDX

[TimStone]

When I open a CDX file, I know the indexes ( orders ) open automatically.

Is there a command that returns the available index names ? I want to create a dropdown list with the available indexes so I can select which order I want to apply, and switch them.

Normally I know all the names when I start to use a file, but in this case, I could be selecting any file !

Thanks for the input. I use DBFCDX and ADS for my RDD's.

Tim

[nageswaragunupudi]

Code: Select all  Expand view

for n := 1 to OrdCount()
AAdd( aTags, { OrdName( n ), OrdBagName( n ), OrdKey( n ) } )
next n


 

[TimStone]

I worked it out. I'm using data objects, ( tdatabase / tdata ) and OrdCount( ) is not supported. The proper code for someone using tdatabase / tdata is:

for n := 1 to OrdKeyCount()
AAdd( aTags, oDbf:IndexName( n ) , oDbf:IndexBag( n ), oDbf:IndexKey( n ) } )
next n

Then aTags provides the desired list.

Thanks for providing the direction.

Tim

[nageswaragunupudi]

OrdKeyCount() does not return number of open index-tags. This function returns number of records in an index/tag.

OrdCount() returns the number of Tags open. This function is supported by RDD and is available whether we use a class or not.

If we are using a TDatabase like object, we can use ( oDbf:nArea )->( OrdCount() )

[TimStone]

Thanks for the clarification. I have implemented it successfully.

Tim