private void queryBackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
    {
        //Initialize sqlconnection
        SqlConnection myConnection;

        //Convert date in to proper int format to match db
        int fromDate = int.Parse(dateTimePickerStartDate.Value.ToString("yyyyMMdd"));
        int toDate = int.Parse(dateTimePickerEndDate.Value.ToString("yyyyMMdd"));

        //Setup Parameters
        SqlParameter paramFromDate;
        SqlParameter paramToDate;
        SqlParameter paramItemNo;
        SqlParameter paramCustomerNo;

        //Fill the data using criteria, and throw any errors
        try
        {
            myConnection = new SqlConnection(connectionString);
            myConnection.Open();
            using (myConnection)
            {
                using (SqlCommand myCommand = new SqlCommand())
                {
                    //universal where clause stuff
                    string whereclause = "WHERE ";

                    //Add date portion
                    paramFromDate = new SqlParameter();
                    paramFromDate.ParameterName = "@FromDate";
                    paramFromDate.Value = fromDate;

                    paramToDate = new SqlParameter();
                    paramToDate.ParameterName = "@ToDate";
                    paramToDate.Value = toDate;

                    myCommand.Parameters.Add(paramFromDate);
                    myCommand.Parameters.Add(paramToDate);

                    whereclause += "(TableName.date BETWEEN @FromDate AND @ToDate)";

                    //Add item num portion
                    if (!string.IsNullOrEmpty(itemNo))
                    {
                        paramItemNo = new SqlParameter();
                        paramItemNo.ParameterName = "@ItemNo";
                        paramItemNo.Value = itemNo;

                        myCommand.Parameters.Add(paramItemNo);

                        whereclause += " AND (Tablename.item_no = @ItemNo)";
                    }

                    //Add customer number portion
                    if (!string.IsNullOrEmpty(customerNo))
                    {
                        paramCustomerNo = new SqlParameter();
                        paramCustomerNo.ParameterName = "@CustomerNo";
                        paramCustomerNo.Value = customerNo;

                        myCommand.Parameters.Add(paramCustomerNo);

                        whereclause = whereclause + " AND (Tablename.cus_no = @CustomerNo)";
                    }


                    string sqlquery = "SELECT * FROM TableName ";
                    sqlquery += whereclause;

                    //MessageBox.Show(sqlquery);

                    myCommand.CommandText = sqlquery;
                    myCommand.CommandType = CommandType.Text;
                    myCommand.Connection = myConnection;

                    this.exampleTableAdapter.ClearBeforeFill = true;
                    this.exampleTableAdapter.Adapter.SelectCommand = myCommand;
                    this.exampleTableAdapter.Adapter.Fill(this.ExampleDataSet.ExampleTable);
                }
            }
        }
        catch (System.Exception ex)
        {
            Console.WriteLine(ex.ToString());
        }
    }