SqlServer:
<add name="DataSource" connectionString="server=****,***;database=***;uid=***;pwd=***;Max Pool size=512;Min Pool size=10;Pooling=true;"
providerName="System.Data.SqlClient" />
Access
<add name="DataSource" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|目录/****.mdb"
providerName="System.Data.OleDb" />
|DataDirectory|表示程序所运行的目录