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Copy DataTable Structure without Data

Posted on 2004-08-05
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Last Modified: 2008-06-21
I have a one datatable dt1 with some data

I need to create a new datatable dt2 and I shud copy the structure of dt1 without copying data.

is it possible ?

I know it is possible to copy both data and structure using copy method





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Question by:Saravanu
  • 4
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9 Comments
 
LVL 28

Accepted Solution

by:
mmarinov earned 50 total points
ID: 11725173
Hi,

there is a method called Clone() that do exactly what you want

Regards,
B..M
0
 
LVL 14

Expert Comment

by:puranik_p
ID: 11725335
Let me get it right.

You have a table in your database and you need to create exact copy of that , but not the data. A one time job. right ?

If yes,

SELECT TOP 0 * INTO <NewTableName> FROM <ExistingTableName>

This will work with MS SQL Server and Access.
0
 

Author Comment

by:Saravanu
ID: 11725435
B..M

No way denying  points u deserve

but when I refer .Clone I get NullException error , y is that..

I have a dataTable which has been set in Page_Load (!isPostBack)

I am using that dataset now in a button click event.

when I refer that dataTable.Clone am getting nullexception error.

how to solve this?



0
 
LVL 28

Expert Comment

by:mmarinov
ID: 11725576
the syntax for using Clone method is

DataTable dt = _srouceDataTable.Clone();

in your case may be the datatable object is null in the button's click event.
you have to trace(debug) your application and check where the datatable became null

Regards,
B..M
0
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LVL 28

Expert Comment

by:mmarinov
ID: 11733147
Hi Saravanu,

Can you tell me why B Grade?
Check this in the rules of EE : http://www.experts-exchange.com/Programming/Programming_Languages/Dot_Net/ASP.NET/help.jsp#hi73

B..M
0
 

Author Comment

by:Saravanu
ID: 11733158
please let me know how to change the grade
0
 
LVL 28

Expert Comment

by:mmarinov
ID: 11733174
as a Dot.Net Page Editor i can unaccept the answer and you can change it

B..M
0
 

Author Comment

by:Saravanu
ID: 11733184
pls do that
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