1、下载“Oracle.ManagedDataAccess.dll”；
2、在工程中添加引用“Oracle.ManagedDataAccess.dll”；
3、引用命名空间“using Oracle.ManagedDataAccess.Client;”
4、连接数据库代码如下：
public bool Connect(string hostaddress, string servername, string uid, string pwd)
{
string connString = "Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST="+ hostaddress +")(PORT=1521))(CONNECT_DATA=(SERVICE_NAME="+ servername +")));Persist Security Info=True;User ID="+ uid +";Password="+ pwd +";";
OracleConnection conn = new OracleConnection(connString);
conn.Open();
if(conn.State==ConnectionState.Open)
{
conn.Close();
return true;
}
else
{
return false;
}
}