Question

private void dataGridView1_CellBeginEdit(object sender, DataGridViewCellCancelEventArgs e)
    {
        try
        {
            if ((dataGridView1.Focused) && (dataGridView1.CurrentCell.ColumnIndex == 0))
            {
                dtpInstallment.Location = dataGridView1.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, false).Location;
                dtpInstallment.Visible = true;
                if (dataGridView1.CurrentCell.Value != DBNull.Value)
                {
                   // dtpInstallment.Value = DateTime.Today;
                   dtpInstallment.Value = (DateTime)dataGridView1.CurrentCell.Value;

               //     DateTime date = (DateTime)dataGridView1.CurrentCell.Value;
                 //   dtpInstallment.Value = DateTime.Parse(date.ToString("dd/MM/yyyy"));


                }
                else
                {
                    dtpInstallment.Value = DateTime.Today;
                }
            }
            else
            {
                dtpInstallment.Visible = false;
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }

In this datetime is throwing an exception…there is value in dataGridView1.CurrentCell.Value..but not able to convert to dtpInstallment.value which is DateTimePicker

Answer 1

It’s because the value your are parsing is not on the correct format. Try using ParseExact

string poop = "2005-12-14 23:12:34";
string currentFormat = "yyyy-MM-dd HH:mm:ss";
DateTime poo = DateTime.ParseExact(poop, currentFormat, System.Globalization.CultureInfo.InvariantCulture);
// yyyy-MM-dd HH:mm:ss ==> you can change the format that matches the current
//                         value of your dataGridView1.CurrentCell.Value