資料庫連接配接字元串當中的|DataDirectory|

請看如下資料庫連接配接字元串：string strcn = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|\Database\LandInspect.mdb;Persist Security Info=False;";

其他略去不表，Data Source=|DataDirectory|是代表哪個路徑呢？

By default this variable will be expanded as: 

•For a local Application this will be the Assembly (App's .exe) folder;

•For ClickOnes running Apps it will be a special data folder created by ClickOnes;

•For ASP.NET App it will be App_Data folder. 

Because the |DataDirectory| is a property of App domain, you can change its value by doiung

AppDomain.CurrentDomain.SetData("DataDirectory", newDataPath);

說白了，在winform中，除非你另外設定，否則就是Debug檔案夾。

PS：百度知道有個類似的東西，可以注意一下。

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本文轉自 huohe2009 51CTO部落格，原文連結:http://blog.51cto.com/zhaojie/932235