if i try to add int value into array with string length Whole data is "0" why? and how can solve it?

  for (int j = 0; j < dTable.Columns.Count; j++)
                for (int i = 0; i < dTable.Rows.Count; i++)
                {

                    mycounter[i] = dTable.Rows[i][j].ToString().Length;
                }

it is not related to mycounter because:

  string test = "";
           foreach(DataColumn dc in dTable.Columns)
                for (int i = 0; i < dTable.Rows.Count; i++)
                {
                   // MessageBox.Show(dTable.Rows[i][dc].ToString());
                    test = dTable.Rows[i][dc].ToString().Length.ToString();
                }