.NET连接Oracle的方法
方式1：直接利用.NET的oracle驱动连接
引用System.data.oracleclient;
using System.data.oracleclient;
string oradb = "Data Source=water;User Id=modis;Password=modis;Integrated Security=no";
OracleConnection conn = new OracleConnection(oradb);
conn.Open();
方式2：安装完ODP.net（Oracle Data Provider.NET)，通过OLEDB连接。
引用System.Data.OleDb;
using System.Data.OleDb;
string oradb = "Provider=OraOLEDB.Oracle;Data Source=water;User Id=modis;Password=modis;";
OleDbConnection myConnection = new OleDbConnection(oradb);
myConnection.Open();
方式3：安装完ODP.net，通过Oracle的连接器
引用动态链接库Oracle.DataAccess.Client.
using Oracle.DataAccess.Client;
string oradb = "Data Source=water;User Id=modis;Password=modis;";
OracleConnection conn = new OracleConnection(oradb); // C#
conn.Open();