//When cbxInvNum is changed, it will display all fields on dgDisplay datagrid from SaleReceipts Table where invoice number = to the selected invoice number
string sql = "SELECT * WHERE InvoiceNumber = " + cbxInvNum.Text;
SqlCommand cmd = new SqlCommand(sql, dbConnection);
cmd.CommandType = CommandType.Text;
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
da.Fill(dt);

SqlConnection dbConnection = new SqlConnection(xmldb);
dbConnection.Open();
string sql = "SELECT InvStatus FROM SaleReceipts Where AccNum = '" + lblAccNum.Text + "' ";
SqlCommand command = new SqlCommand(sql, dbConnection);
SqlDataReader reader = command.ExecuteReader();
while (reader.Read())
{
         InvoiceStatus = reader[0].ToString();

// Declare an array 
                String[] drinkList = new String[5];

                // Place some items in it 
                drinkList[0]

private void OpenForm_Click(object sender, System.EventArgs e)
{
// Get the value to be passed
string parentValue = this.UserResponse.Text;

// Create the child form and pass the value

/*	For a standard cash drawer, there's a physical cable that runs from the cash drawer and plugs into the receipt printer. 
•	To open the drawer, you issue a command to the printer. The printer will send a signal to the cash drawer that kicks open the drawer. 
•	For a standard epson receipt

using System;
using System.IO;
using System.Runtime.InteropServices;

namespace PrintDataGrid
    /*	For a standard cash drawer, there's a physical cable that runs

// getting the dataset
                string connString = System.Configuration.ConfigurationSettings.AppSett  ings.Get("ConnectionString");
                string query = "Select * from SaleReceipts";                           
                conn = new OleDbConnection(connString);

// getting the dataset
                string connString = System.Configuration.ConfigurationSettings.AppSettings.Get("ConnectionString");
                string query = "Select * from SaleReceipts";                           
                conn = new OleDbConnection(connString);