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adding rows from one datatable to another

The following code :
For Each r As DataRow In dtFlow.Rows
Dim arow As DataRow = dtAllFlows.NewR ow
arow = r
dtAllFlows.Rows .Add(arow)

leads to the error 'This row already belongs to another table '
at the line dtAllFlows.Rows .Add(arow).
I guess I should just do dtAllFlows = dtFlow.copy, but I can't as the
code above is contained in a For loop and at each iteration, I add new
rows (dtFlow changes at each iteration).

How can I solve this problem ?


Nov 21 '05
21 22732
NOOOOOOOOOOOO !!!!!!! :-) I think we'll never understand each other on
this one, LOL
I don't want to add a table to two datasets. I just want to :

I know however what I showed you is the same as

dim dt as datatable = dtold.clone
for each row as datarow in dtold
dt.importrow(ro w)

However mayby you want to do it selective than you need this one.


Nov 21 '05 #21
hi guys..

Pls be careful when using the below options if your appln architecture is
using rowstates
1) importrow does not modify the rowstate as added.

2) methods like remove() are not advisable if what you want to do is just
delete it is like calling delete and acceptchanges.

3) i too did not understand this one..


"Cor Ligthert" wrote:

Quickly writen in this messages so watch typos or others.

The first
dim dtnew as datatable = dtOld.Clone
dtnew.rows.Add( dt.newrow)
dtnew.importrow (dtOld.Rows(0))
The second
dim dtnew as datatable = dtOld.Clone
dtnew.rows.Add( dt.newrow)
dim dr as datarow = dtnew.rows(0)
dt.rows.remove( 0)
dtnew.rows.Add( dr)
The third
dim dv = new dataview(dtOld)
'in a dv the show on a datarow is to get (as I showed you before) as a

I hope this give some ideas


Nov 21 '05 #22

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