how to check there is a row in specific index to avoid IndexOutOfRangeException

Question

I want to to know how to check there is a row in specific index to avoid the following exception :

System.IndexOutOfRangeException

for example :

if (dtNew != null && dtNew.Rows.Count > 0 )
{
    if (dtNew.Rows[i][0] != null)
    {
        row["newEmp"] = dtNew.Rows[i][0];
    }
    else
    {
        row["newEmp"] = 0;
    }
}

What if dtNew has just a one row and the i = 3 !!

Can you use Contains method?

Vladimir Sachek
– Vladimir Sachek

2014-05-12 09:24:21 +00:00
Commented May 12, 2014 at 9:24 — Vladimir Sachek
– Vladimir Sachek, Commented May 12, 2014 at 9:24
iterate over it using Count of it

Ehsan Sajjad
– Ehsan Sajjad

2014-05-12 09:24:57 +00:00
Commented May 12, 2014 at 9:24 — Ehsan Sajjad
– Ehsan Sajjad, Commented May 12, 2014 at 9:24
the loop has more than datatable wiz different counts

Anyname Donotcare
– Anyname Donotcare

2014-05-12 09:26:01 +00:00
Commented May 12, 2014 at 9:26 — Anyname Donotcare
– Anyname Donotcare, Commented May 12, 2014 at 9:26

Jon Skeet · Accepted Answer · 2014-05-12 09:25:45Z

2

Well if you want to get to row i, you need to change your check from

&& dtNew.Rows.Count > 0

to

&& dtNew.Rows.Count > i

Currently you're only checking whether there are any rows - i.e. whether dtNew.Rows[0] is valid.

(Do you definitely need to check for dtNew being null? Is that a valid program state? Likewise is it valid for the row to exist but column 0 to not be populated? You may be able to make your code much simpler.)

answered May 12, 2014 at 9:25

Jon Skeet

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