How to combind two datatables in to one datatable in .net

[bhappy]

Hai All,

I need to combind two datatables.Firs t table contains 2 columns and 2nd table contains 3 columns, i need to combind both in one table, and the result should be in 5 columns.Is it possible...?


Thanks,
Aswath.

[mzmishra]

yes it is possible.
Create third table have all 5 columns and populate the data with both the tables.

[debasisdas]

you need to combine two databases or two tables ?

BTW what is the database that you are using ?

[bhappy]

Hai
Thanks for Replay,

Im using MS SQL Server.Im getting data from Database,In code behind im using two datatables for two stored procedures.fina lly i need to combind two datatables to one and i want the result in pyarlally ie.
datatable1 --10 rows x 2columns
datatable2 --10 rows x 3 columns

result table:---- 10rows x 5 columns is it possible.....?

Thanks,
Aswath.

[kunal pawar]

u can do it, just create table using Datatable, Datacolumn and then add the both tables rows in 3rd table

[bhappy]

Hai

Thanks for Replay,
Creating new datatable is ok,but while adding rows from two datatables i dont't have any common columns,how can i add..? and i tried like using "datatable.load datarow()" method but im getting result as

dt1-----10 x 2 (rows x columns)
dt2 ----10 x 3

for i=0 to dt2.rows.count-1
dt1.loaddatarow (dt1.rows(i).it emarray,true)

output is :dt1--------20 x 3
need dt1 as 10 x 5 (rows x columns)

Thanks,
Aswath.

[bhappy]

Hai All,

Any sollution to my problem........ ..........?

Thanks,
Aswath.

[thenmozhivasanraj]

Create Datatable with 6 columns

1 Column should have a unique field which is used to update the datas from second database table.

Query the first Database and create the rows through code.

query the second Database and compare the each and every row compare with datatable and update the 3 columns in datatable.

You will get 6 column Datatable. If you wants to bind with anyother control just make visible false it the unique id column.

[Vajrala Narendra]

Hai
Thanks for Replay,

Im using MS SQL Server.Im getting data from Database,In code behind im using two datatables for two stored procedures.fina lly i need to combind two datatables to one and i want the result in pyarlally ie.
datatable1 --10 rows x 2columns
datatable2 --10 rows x 3 columns

result table:---- 10rows x 5 columns is it possible.....?

Thanks,
Aswath.

without having common column in those you can't combine those two tables
using views you can get that type of results

[CyberSoftHari]

Can you explain why you want to combine two tables? That will be helpful to the experts to point you correct direction.
Note: do not let us assume

[bhappy]

Hai

Thanks for Replay,

I already told that there is no common columns in two tables, so im using two datagrids(side by side) to display the information.Up to here it is ok,Now my client need the data to be exported to Excel.Here im getting problem that only one datatable data is exported to excel.That's why i need to combind two datatables.

Thanks,
Aswath.

[balabaster]

Hai

Thanks for Replay,

I already told that there is no common columns in two tables, so im using two datagrids(side by side) to display the information.Up to here it is ok,Now my client need the data to be exported to Excel.Here im getting problem that only one datatable data is exported to excel.That's why i need to combind two datatables.

Thanks,
Aswath.

I would probably just do a straight parse of the two datatables...

• Create an instance of an Excel Workbook/Worksheet
• Parse table 1 dumping the contents into columns 1 and 2 of the worksheet instance
• Parse table 2 dumping the contents into columns 3, 4 and 5 of the worksheet instance
• Save the worksheet object to disk
• Dispose the worksheet object

Does that answer your question? You specify that you don't have any piece of common data, but the way you describe it, there is a tacit implication that the row number of each grid is the common key. Even though neither grid physically contains a key field, the key is implied in the manner in which you are wanting to join the tables.

Table1.Row0 is paired with Table2.Row0
Table1.Row1 is paired with Table2.Row1
Table1.Row2 is paired with Table2.Row2
etc...

Your common piece of data is the row number of each data table, even though it is not contained within the visible data sets.

[bhappy]

Hai
Thanks for Replay,
i dono how to parse datatable to excel.any other idea plz.........?