private void clear_Click(object sender, EventArgs e)
 {
     VendorName.Clear();
     VendorAddress.Clear();
     PhoneNO.Clear();
     Email.Clear();
     VendorID.Clear();
 }
        private void submit_Click(object sender, EventArgs e)
        {
            if (VendorName.Text == "" || VendorAddress.Text == "" || PhoneNO.Text == "" || Email.Text == "" || VendorID.Text == "")
            {
                MessageBox.Show("Please provide all the details", "Captions", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
            if (PhoneNO.Text.Length != 10)
            {
                MessageBox.Show("Enter valid Phone number", "Captions", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }

            try
            {
                Connect connectObj = new Connect();
                con = connectObj.connect();

                SqlCommand cmd = new SqlCommand("Insert into VENDOR (vid,vname,address,phone_number,email) values(@id,@vname,@address,@phno,@email);", con);

                cmd.Parameters.AddWithValue("@id", VendorID.Text);
                cmd.Parameters.AddWithValue("@vname", VendorName.Text);
                cmd.Parameters.AddWithValue("@phno", Convert.ToInt64(PhoneNO.Text));
                cmd.Parameters.AddWithValue("@address", VendorAddress.Text);
                cmd.Parameters.AddWithValue("@email", Email.Text);

                int i = cmd.ExecuteNonQuery();
                //If count is equal to 1, than show frmMain form
                if (i != 0)
                {
                    MessageBox.Show("Vendor Insertion Successful!", "Captions", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
                else
                {
                    MessageBox.Show("Vendor Insertion Failed", "Captions", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
                con.Close();

                //Clear all the fields.
                VendorName.Clear();
                VendorAddress.Clear();
                PhoneNO.Clear();
                Email.Clear();
                VendorID.Clear();
            }
            catch (Exception ex)
            {
                MessageBox.Show("Failed!! Try with Different ID!!", "Captions", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            finally
            {
                if (con != null)
                {
                    con.Close();
                }
            }
        }