OracleConnection con = new OracleConnection( ConfigurationSettings.AppSettings["cnQuo.ConnectionString"]); OracleCommand cmd = new OracleCommand( "SELECT CompanyID FROM Quo.Company " + "WHERE CompanyName = '" + txtCompanyName.Text.Trim() + "'", con); string companyID; con.Open(); if (cmd.ExecuteScalar() == null) {companyID = string.Empty;} else {companyID = cmd.ExecuteScalar().ToString();}