ASP.NET 2.0 web.config数据库连接设置与读取

第一种方法设置：

<connectionStrings>
<add name = "mdbconn" [String, Required, Collection Key] connectionString = "" [String, Required] providerName = "System.Data.SqlClient" [String] />
</connectionStrings>

读取：
string strConnection = ConfigurationManager.ConnectionStrings["mdbconn"].ToString();

第二种方法设置：
<appSettings>
<add key="strcon" value="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\Backup\我的文档\Visual Studio 2005\WebSites\4ec\App_Data\company.mdb"/>
</appSettings>
<connectionStrings/>

读取：
OleDbConnection con = new OleDbConnection(ConfigurationSettings.AppSettings["strcon"]);