Replace Data to a TDMS file

[pante]

Hi

Is there a way to replace one specific "row" of data in a TDMS file?

The file is huge, so reading the whole file, do the changes and then create a new TDMS, is not an option.

If i write to a specific row, all the next data are deleted (?), and this row becomes the last one

Thanks

[GerdW · Accepted solution]

Hi pante,

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@pante wrote:

Is there a way to replace one specific "row" of data in a TDMS file?

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There is: "reading the whole file, do the changes and then create a new TDMS"...

(TDMS is made for streaming measurement data into a file very fast, but not for editing contents later on.)

[pante]

Thanks... i was afraid this was the correct answer.

Is there another file option?

Or i must switch to a database?

[Yamaeda]

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@pante wrote:

Thanks... i was afraid this was the correct answer.

Is there another file option?

Or i must switch to a database?

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I assume you can handle it as a binary file and set the file pointer to the byte in question and overwrite it. But if you need to insert values so the size changes there's no other solution than creating a new file.

However, you don't need to read all at once, you can copy e.g. 1MB chunks to a new file and change/insert as needed.