private void btnUpdate_Click(object sender, EventArgs e)
{
ProcessList prlist = new ProcessList();
SqlCommand komut = new SqlCommand("update process set NAME='" + comboBox1.Text + "',book='" + comboBox2.Text + "',borrow_time=@borrowedtime,delivery_time=@deliverytime,notes='" + txtNotes.Text + "'where process_id= @test ", con);
komut.Parameters.AddWithValue("@borrowedtime", borrowedTime.Value.Date);
komut.Parameters.AddWithValue("@test", prlist.dataGridViewProcessList.CurrentRow.Cells[0].Value.ToString());
komut.Parameters.AddWithValue("@deliverytime", deliveryTime.Value.Date);
con.Open();
komut.ExecuteNonQuery();
con.Close();
SqlDataAdapter da = new SqlDataAdapter("Select * from process", con);
DataSet ds = new DataSet();
da.Fill(ds);
prlist.dataGridViewProcessList.DataSource = ds.Tables[0];
MessageBox.Show("updated succesfully");
}