How to copy one column's value to another column's value in same datatable in c#

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1.00/5 (1 vote)

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Hi have datatable like,

VB

Column1 | Column2
1        NULL
2        NULL
3        NULL
4        NULL

I Want datatable Like

VB

Column1 | Column2
1         1
2         2
3         3
4         4

for this what i have to do in .cs file.

Posted 6-Jun-14 3:32am

pareshpbhayani

Updated 27-Jul-20 6:51am

v2

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[no name] 6-Jun-14 9:34am

"write code of .cs file", no. That is not how this works. We do not write code to order. You need to give this a try first and then ask a question if you run into an actual problem.

pareshpbhayani 6-Jun-14 9:41am

I apologize for that, i have tried myself but i could not get any shortcut solution.

2 solutions

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Future Hacker · Answer 1 · 2019-12-01T20:17:00

Solution 2

foreach(DataRow dr in dataTable.Rows)
{
dr["NewColumn"] = dr[OldColumn];
}

Posted 1-Dec-19 20:17pm

Future Hacker

hypermellow · Answer 2 · 2014-06-06T03:37:00

Solution 1

Something like this should get you started:

C#

for(int i = 0; i < dataTable.Rows.Count; i ++)
        dataTable[i]["Column2"]=dataTable[i]["Column1"].ToString();

Hope it helps.

Posted 6-Jun-14 3:37am

hypermellow

Comments

pareshpbhayani 6-Jun-14 9:38am

but is there any shortcut for it?

ZurdoDev 6-Jun-14 9:47am

That IS the shortcut. It is extremely simple to do. What were you hoping for?

pareshpbhayani 6-Jun-14 10:08am

I have lost of rows in my datatable so loop take 10 to 15 sec to copy data from one column to another column.

hypermellow 6-Jun-14 10:12am

How are you populating your DataTable? - could you copy the column values as you populate?

pareshpbhayani 6-Jun-14 10:45am

I am getting datatable from database.

Nayan Rudani 7-Jun-14 2:43am

if you get DataTable From Database then get Column2 as Alis of Column1