How to move to next row in while loop

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How to move to next row in while loop in table

What I have tried:

C#

while (rows["Token_no"].ToString() == cToken && DateTime.Parse(rows["Date"].ToString()) == dDDate)
{
  rows.BeginEdit();
  rows["In_out"] = "I";
  rows.EndEdit();

  // want move to next row
}

Posted 28-May-17 2:24am

Member 12931315

Updated 28-May-17 9:58am

Kornfeld Eliyahu Peter

v2

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Kornfeld Eliyahu Peter 28-May-17 8:31am

What 'rows' is? And what do you mean by rows['']? Have you compiled this code?

Patrice T 28-May-17 8:54am

Asking questions is a skill[^]
Some guidelines for posting questions in the forums[^]

2 solutions

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RickZeeland · Answer 1 · 2017-05-28T04:31:00

Solution 1

Something like this:

foreach (DataRow row in rows)
{
	if (row["Token_no"].ToString() == cToken && DateTime.Parse(row["Date"].ToString()) == dDDate)
	{
		row["In_out"] = "I";
	}
}

Here is an interesting article about working with DataTable and DataRow:[^]

If you have a DataTable table, then you can use:

C#

While (i < table.Rows.Count)
{
   DataRow row = table.Rows[i];
   i++;
}

Posted 28-May-17 4:31am

RickZeeland

Updated 28-May-17 7:24am

v3

Comments

Member 12931315 28-May-17 12:44pm

Thank you very much for reply

Sorry I didn't put whole code , It's already in foreach loop
there I take token_no and date to while loop for token_no because, there are several token_no's in a day ,once I worked with current one, I want move next line (record)
Is that possible in while loop

Thanks

Ajith

Maciej Los · Answer 2 · 2017-05-28T09:58:00

Another way (as an alternative to solution 1 by RickZeeland[^]) to update data is to use Linq.

Take a look at example:

C#

DataTable dt = new DataTable();
dt.Columns.Add(new DataColumn("ID", typeof(int)));
dt.Columns.Add(new DataColumn("In_out", typeof(string)));
for(int i=0; i<50; i++)
{
	dt.Rows.Add(new Object[]{i, string.Format("row{0}",i)});
}


var query = dt.AsEnumerable()
    .Where(r=>r.Field<int>("ID") % 2 ==0)
    .ToList();

foreach (DataRow row in query)
{
    row.SetField("In_out", "I");
}

Result:

ID In_out
0  I 
1  row1 
2  I 
3  row3 
4  I 
5  row5 
6  I

Change the code to your needs.