Building Three-Tier Client/Server Applications with Visual FoxPro
Robert Green
Microsoft Corporation
January 1997
Introduction
Your good friends on the Visual FoxPro™ team at Microsoft spent a great deal of time to make Visual FoxPro a robust and powerful front-end for client/server applications. Remote views and SQL pass-through provide powerful tools to take advantage of SQL back-ends such as Oracle and SQL Server via ODBC (Open Database Connectivity).
One of the great truisms of application development is that there are many ways to do everything. One of the hardest things to do when building an application is to decide on an approach and to know if it is better than the other approaches. In client/server development this is compounded by the fact that you are dealing with two database engines, Visual FoxPro on the front-end and a very powerful SQL database e在客戶-服務(wù)器三層結(jié)構(gòu)中用Visual FoxPro創(chuàng)建應(yīng)用
在微軟公司Visual FoxPro 團隊中的人員花了篅@さ氖奔涫筕isual FoxPro成為了一種靈活強大的客戶機/服務(wù)器應(yīng)用前端。利用遠程視圖和SQL提交兩種方法提供的強大功能創(chuàng)建客戶-服務(wù)器應(yīng)用，以充分利用基于ODBC(Open Database Connectivity)的后臺數(shù)據(jù)庫（如Oracle和SQL Server）。
應(yīng)用發(fā)展的巨大真實性之一就是做每件事都有很多的方法。在建立一個應(yīng)用時最難做的事之一就是確定一個方法以及知道這個方法是否比其它所有的方法都好。在客戶機/服務(wù)器的發(fā)展中，這個方法就是實際上是在混合處理兩個數(shù)據(jù)庫引擎，前端的Visual FoxPro和后端非常強大的SQL數(shù)據(jù)庫引擎。
在這篇文章中，用Visual FoxPro建立的一個對象鏈接和嵌入服務(wù)器被用來創(chuàng)建三層客戶機/服務(wù)器應(yīng)用。加了一個中間層用來提供一個額外的空間存放代碼和運行確認。
ngine on the back-end.