private void btnSave_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < dataGridView1.Rows.Count; i++)
            {
                string StrQuery = @"INSERT INTO finance VALUES ('" + Convert.ToInt32(dataGridView1.Rows[i].Cells["ID"].Value) + "', '" + dataGridView1.Rows[i].Cells["Account Number"].Value + "', '" + dataGridView1.Rows[i].Cells["Bank Name"].Value + "','" + dataGridView1.Rows[i].Cells["Branch Code"].Value + "', '" + dataGridView1.Rows[i].Cells["Student Name"].Value + "', '" + dataGridView1.Rows[i].Cells["Class"].Value + "', '" + dataGridView1.Rows[i].Cells["Section"].Value + "','" + txtDueDate.Text.Trim() + "','" + txtValidityDate.Text.Trim() + "','" + txtNewIssueDate.Text.Trim() + "', '" + Convert.ToDecimal(dataGridView1.Rows[i].Cells["Registration Fee"].Value) + "', '" + Convert.ToDecimal(dataGridView1.Rows[i].Cells["Admission Fee"].Value) + "', '" + Convert.ToDecimal(dataGridView1.Rows[i].Cells["Security Fee"].Value) + "', '" + Convert.ToDecimal(dataGridView1.Rows[i].Cells["Annual Charges"].Value) + "', '" + Convert.ToDecimal(dataGridView1.Rows[i].Cells["Prospectus Fee"].Value) + "', '" + Convert.ToDecimal(dataGridView1.Rows[i].Cells["Tuition Fee"].Value) + "', '" + Convert.ToDecimal(dataGridView1.Rows[i].Cells["Computer ICT Fee"].Value) + "', '" + Convert.ToDecimal(dataGridView1.Rows[i].Cells["Lab Charges"].Value) + "', '" + Convert.ToDecimal(dataGridView1.Rows[i].Cells["Arrears"].Value) + "', '" + Convert.ToDecimal(dataGridView1.Rows[i].Cells["Safety Fee"].Value) + "', '" + Convert.ToDecimal(dataGridView1.Rows[i].Cells["Admission Process Fee"].Value) + "', '" + Convert.ToDecimal(dataGridView1.Rows[i].Cells["ICT Book"].Value) + "', '" + Convert.ToDecimal(dataGridView1.Rows[i].Cells["Uniform Fee"].Value) + "', '" + Convert.ToDecimal(dataGridView1.Rows[i].Cells["Others"].Value) + "', '" + Convert.ToDecimal(dataGridView1.Rows[i].Cells["Fine"].Value) + "', '" + Convert.ToDecimal(dataGridView1.Rows[i].Cells["Net Payable"].Value) + "', '" + Convert.ToDecimal(dataGridView1.Rows[i].Cells["Net Payable After Due Date"].Value) + "', '" + dataGridView1.Rows[i].Cells["Status"].Value + "');";

                try
                {
                    using (SqlConnection conn = new SqlConnection(Connection_Properties.GetConnectionString()))
                    {
                        using (SqlCommand comm = new SqlCommand(StrQuery, conn))
                        {
                            conn.Open();
                            comm.ExecuteNonQuery();
                            comm.Clone();
                            conn.Close();
                        }
                    }
                }
                catch (Exception ee)
                {
                    MessageBox.Show("All Records Added Successfully.", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
            }
        }
 public void con()
 {
     SqlConnection con = new SqlConnection(Connection_Properties.GetConnectionString());
 }