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Getting a subset from a Dataset in a new Dataset

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Jan Schoenrock (VIP)

Hello,
I'm facing with the the following problem:

I have dataset with several datatables (5).
The first Table t1 contains the parent objects of the second table t2
(relation) and the second table has parent relations the other 3 tables
(t3,t4,t5).
Now I want to copy only one row of t1 with all sub-elements of the other
tables into a new dataset of the same type.
I found no performant answer to this wish.
May I ask you to help ?

Greetings and thanks in advance Jan
--
Jan Schoenrock, Hamburg, Germany

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W.G. Ryan eMVP (VIP)

I'm not sure what you've tried already, but since you have datarelations set
up and you have a DataRow object, have you tried the .GetChildRows method ?
"Jan Schoenrock" <Click here to reveal e-mail address> wrote in message
news:Click here to reveal e-mail address...
[Original message clipped]

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Jan Schoenrock (VIP)

Thanks for your answer.
Yes I tried the .GetChildRows-Method and thought it will be the way of
choice. But this method returns only an array of rows. There is no overloaded
version which returns a datatable object.
And I did not found a Member of the datatable object which is able to add a
array of rows to the datatable.

When using the .GetChildRows-method i have to loop trough the array and add
child row per child row to the new dataset.
This might be not a very performant approach.

Greetings and thanks for your answer,

Jan

"W.G. Ryan eMVP" wrote:

[Original message clipped]

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Jan Schoenrock (VIP)

Hello again,

sorry but now I found the solution for myself.
The right way to copy a subset of a dataset to a new one with the same
Schema is the dataset.merge method.

Greetings Jan

"Jan Schoenrock" wrote:

[Original message clipped]

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System.Data.DataRow

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