HOw can I read cluster in file with binary daya of 65M

[Hitesh_Dhola]

I am able to write a cluster of "dbl, I32, string" in binary file.. but I am not able to read it .. any one can help?... I am saving setting configuration of setup in data file before data starts...

thank u

[TCPlomp]

Could you show a little bit of code?

Ton

[Hitesh_Dhola]

To write cluster I am using "write Binary file" example and for Reading "Read binary fie" don't work... Can u suggest me any way? (using any loop.. or "byte stream refnum")

[Hitesh_Dhola]

I am explaining In detail.. What i want is... Before I start storing data in binary file.. I want to store a header which discribes the test setup instruments.. Like Device No.,, Person name.., temperature.., date..,.. total 17 items of diffrent format.... Then I want to store the data in same binary file...

I want all in same file because If I read the file after some years.. I don't have to find any information regarding that test conditions. and can simply generate the report again that time. and this is very important...

Now.. as my file data is 65MB binary data.. It will be ok to append the header after data... or append data after header... ?

Will it be good idea to implement this? or is there any better way?

So.. I thought cluster would work good for this.. and tried to write in binary file .. But Reading is not possible (atleast for me) ..

I think it's clear now.. 

[Rudi_N]

Cyborg:

Another alternative to store your cluster data would be to use datalog files. Datalog files provide efficient storage and random access, however, the storage format for datalog files is complex, and therefore they are difficult to access in any environment other than LabVIEW. It is, though, the easiest method for logging cluster data to file. There are examples in the LabVIEW example finder that can show you how to use them. I would recommend you to look at "Write Datalog File Example.vi" & "Read Datalog File Example.vi". I hope this helps.

Regards,

Rudi N.

[Hitesh_Dhola]

Thanks Rudi,

I don't have a problem with file type... as I will only use Labview... But What about size?.. It will occupy the same size as binary file.. Becoz I have a lots of data to aquire and store...









Cyborg

[Chuck_81]

The file size doesn't change significantly when considering datalog files or binary files.

In the attached VI you can see a comparison for data storage using both datalog and binary I/O.

Hope this helps

Best Regards,

Fabio

[Hitesh_Dhola]

I think this will work.. I will try

Thanks







Cyborg

[Rudi_N]

Cyborg:

Please feel free to post if you need additional information.

Thanks,

Rudi N.

Message Edited by Rudi N on 03-09-2007 04:56 PM

[Hitesh_Dhola]

Thanks Rudi..