Index was out of range while splitting the datetime fields

How to program to accept a blank values for datetime columns into the grid and below is the line of code i'm getting error:

dataGridView1.Rows[RowCount - 1].Cells[cmbIdentity.Text].Value - Now i'm getting Index value is out of range.

for (int RowCount = 1; RowCount <= strfile.Length - 1; RowCount++)
            {
                if (strfile[RowCount].ToString() != "")
                {
                    if (RowCount != 0)
                    {
                        string[] column = strfile[RowCount].Split('þ');
                        for (int i = 1; i < column.Length - 1; i++)
                        {
                            if (cmbColumnCombo.SelectedIndex == ((i - 1) / 2))
                            {
                                if (!string.IsNullOrEmpty(column[i]) && column[i].ToString() != "\u0014")
                                    {
                                        
                                        dataGridView1.Rows.Add();
                                        
                                        DateTime Time = Convert.ToDateTime(column[i].ToString());
                                        dataGridView1.Rows[RowCount - 1].Cells[txtColumnName.Text.Replace(" ", "")].Value = Time.ToString("HH:mm:ss");
                                        dataGridView1.Rows[RowCount - 1].Cells[cmbColumnCombo.Text].Value = Time.ToString("dd/MM/yyyy");
                                        //dataGridView1.Rows[RowCount - 1].Cells[cmbColumn1.Text].Value += column[i].ToString();

                                }
                            }
                        }
 
                        for (int i = 1; i < column.Length - 1; i++)
                        {
                            if (cmbIdentity.SelectedIndex == ((i - 1) / 2))
                            {
                                if (!string.IsNullOrEmpty(column[i]) && column[i].ToString() != "\u0014")
                                {
                                    dataGridView1.Rows[RowCount - 1].Cells[cmbIdentity.Text].Value += column[i].ToString();
                                }
                            }
                        }
                    }
                }
            }

Can anyone please help me how to achieve this?