datagrid view rows repeat data in all rows

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hi every body i have a strange problem in my grid view when i fill my first row with data and move to the second row and after edit the second row and leave the row the data changed to the same as the previous row and so on all row which is edit change to the previous row how can i solve this problem this problem happened when i move with table enter arrows of keyboard

Edit: from comments

this my my code

C#

if (dataGridView1.Rows[e.RowIndex].Cells[1].Value != null)
{
  string cellValue = dataGridView1.Rows[e.RowIndex].Cells[1].Value.ToString();
  if (!string.IsNullOrEmpty(cellValue))
  {
    _bar = cellValue;
    PopulateColumns();
    dataGridView1.Rows[e.RowIndex].Cells[2].Value = _proname;
    dataGridView1.Rows[e.RowIndex].Cells[3].Value = _price;
    dataGridView1.Rows[e.RowIndex].Cells[4].Value = _unit;
  }
}

i use PopulateColumns(); to access data from data table and pass it to the grid view where it equal dataGridView1.Rows[e.RowIndex].Cells[1].Value . when i use break-point it works correct if i stop break point it repeat the same data in each row despite the value of dataGridView1.Rows[e.RowIndex].Cells[1].Value is not the same ?

Posted 28-May-15 23:49pm

ost3z

Updated 29-May-15 1:32am

Andy Lanng

v2

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Andy Lanng 29-May-15 5:59am

Please include the code you are using in furture

CHill60 29-May-15 6:00am

What code do you have behind the datagrid?

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Andy Lanng · Answer 1 · 2015-05-28T23:59:00

Solution 1

You need to initialize the new row in every loop:

C#

DataRow dr;

foreach(var row in myEnumerable)
{
   //Do this in every loop
   dr = new DataRow();

   //...Set column values

   dataTable.Rows.Add(dr);
}

Posted 28-May-15 23:59pm

Andy Lanng