Data Source=203.71.93.101:1521/wf4test;User id=XXX;Password=XXX
簡單說 主機名203.71.93.101 埠 1521 服務名稱 wf4test
連線名稱隨便打 使用者名稱 XXX 密碼 XXX
官網的說明如下
The Oracle client must then specify a valid user name, password, and data source to connect to the database server. To specify a data source, you can use the EZCONNECT format. In the ODP.NET data source attribute, use the following format to define how the client connects to the database server:
[//]host[:port][/service_name]

host = the database server machine's host name
port = the database server machine's port on which it listens for incoming connection requests
service_name = the database's global name
For example, some syntactically valid connection strings follow:
"user id=hr;password=hr;data source=//sales-server:1521/sales.us.acme.com"
"user id=hr;password=hr;data source=//sales-server/sales.us.acme.com"
"user id=hr;password=hr;data source=sales-server/sales.us.acme.com"

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Data Source= :1521/ ; User id= ; Password= ;
就能看到一堆文專講這個的