protected void btnSave_Click(object sender, EventArgs e)
        {
         using (SqlConnection con = new SqlConnection(strConnString))
         {
                SqlCommand cmd1 = new SqlCommand("INSERT INTO Customer (COMPANY_NAME,CONTACT, MOBILE, EMAIL, DESCRIPTION)" +
                 " VALUES (@COMPANY_NAME,@CONTACT,@MOBILE,@EMAIL,@DESCRIPTION)", con);
                
                cmd1.Parameters.AddWithValue("@COMPANY_NAME", this.txtCompanyName.Text);
                cmd1.Parameters.AddWithValue("@CONTACT", this.txtContact.Text);
                cmd1.Parameters.AddWithValue("@MOBILE", this.txtMobile.Text);
                cmd1.Parameters.AddWithValue("@EMAIL", this.txtEmail.Text);
                cmd1.Parameters.AddWithValue("@DESCRIPTION", this.txtDesc.Text);

                con.Open();
                cmd1.ExecuteNonQuery();

                SqlCommand cmd2 = new SqlCommand("INSERT INTO Account (NAME_USER, PASSWORD)" +
                 " VALUES (@NAME_USER, @PASSWORD)", con);        
                cmd2.Parameters.AddWithValue("@NAME_USER", this.txtUser.Text);
                cmd2.Parameters.AddWithValue("@PASSWORD", this.txtPass.Text);

                con.Open();
                cmd2.ExecuteNonQuery();

                SqlCommand cmd3 = new SqlCommand("INSERT INTO Sender (NAME_SEND, STATUS_REG, STATUS_WHITE)" +
                 " VALUES (@NAME_SEND, @STATUS_REG, @STATUS_WHITE)", con);        
                cmd3.Parameters.AddWithValue("@NAME_SEND", this.txtSend.Text);
                cmd3.Parameters.AddWithValue("@STATUS_REG", this.radioReg.Checked);
                cmd3.Parameters.AddWithValue("@STATUS_WHITE", this.radioWhite.Checked);

                con.Open();
                cmd3.ExecuteNonQuery();;
                
                con.Close();

                txtCompanyName.Text = "";
                txtContact.Text = "";
                txtMobile.Text = "";
                txtEmail.Text = "";
                txtDesc.Text = "";
                txtSend.Text = "";                
                txtUser.Text = "";
                txtPass.Text = "";
                radioReg.Checked = true;
                radioReg.Checked = false;
        
         }
}