Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

DataTable Traversal.

Posted on 2004-03-29
2
Medium Priority
?
581 Views
Last Modified: 2012-08-14
I have a DataTable with one Column and four Rows.

 How do i iterate through this an load the string values into an array list.

ArrayList myList = new ArrayList();
foreach(DataRow dRow in dt.Rows)
{
  foreach(DataColumn dCol in dRow)
  {
    // What do  i do here. ?

   // or is there any better way to do it, because there is only one column and multiple rows.
  }
 
}


thanks,
steve.
0
Comment
Question by:steve_mick972
  • 2
2 Comments
 
LVL 22

Expert Comment

by:_TAD_
ID: 10708460
ArrayList myList = new ArrayList();
foreach(DataRow dRow in dt.Rows)  
     myList.Add(dRow[0]);
0
 
LVL 22

Accepted Solution

by:
_TAD_ earned 2000 total points
ID: 10708543


The curly braces "{" are only required if you want to group more than one line together.  Since we are only executing one line in the foreach block, the curly braces are implicit.


Also... since we only have one column, we don't have to iterate through all of the columns... we will just "hard-code" a zero (the first, and only column).

Finally... the above code more or less copies the object from the table to the arraylist.  If the data you are ALWAYS going to return is of a particular type (like an int) then you may want to change from an arraylist to an int[] (better performance in the long run.



int[] myList = new int[dt.Rows.Count];
int i = 0;
foreach(DataRow dRow in dt.Rows)  
     myList[i++] = (int)dRow[0];

0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Real-time is more about the business, not the technology. In day-to-day life, to make real-time decisions like buying or investing, business needs the latest information(e.g. Gold Rate/Stock Rate). Unlike traditional days, you need not wait for a fe…
Performance in games development is paramount: every microsecond counts to be able to do everything in less than 33ms (aiming at 16ms). C# foreach statement is one of the worst performance killers, and here I explain why.
this video summaries big data hadoop online training demo (http://onlineitguru.com/big-data-hadoop-online-training-placement.html) , and covers basics in big data hadoop .
We’ve all felt that sense of false security before—locking down external access to a database or component and feeling like we’ve done all we need to do to secure company data. But that feeling is fleeting. Attacks these days can happen in many w…

963 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question