Add a field to an existing dataset at runtime

Data Abstract
1

hi, what is the best approach to add a temporary field to a TDaDatatable which is already fetched from the server?
so like adding a caculated field at client side
i just want to add a field that i can populate with a status based on a child dataset, so it needs to be processed for every master record
can i simply add a daField to the dataset with logchanges false?
tia!

2

Hi,

you can change dataset/table struct only when it is closed.
so the best workaround - add a new calculated field when dataset/table is closed and fetch data from the server

3

hmmm we don’t have persistent fields in the dataset client side (no rad datasets)
so they get created when data is fetched…
or is there a way to have the fields created before data is fetched so i can add a field when the dataset is still closed?

4

Hi,

these are several ways, for example: table.LoadSchema

5

ok will try thx

6

can’t follow that approach, i’m streaming the data myselves in a specific datacall (and still V3)
so the schema is loaded afterwards

7

Hi,

what code you are using on server-side? usual fetching or manual one?
You can drop it to support@ for keeping privacy

8

manual one
will send code through mail