vs2010查询oracle10g的数据
好了,上面一篇已经介绍了如何连接到数据库中,那么下面将介绍如何查询数据库中的值,仍然采用的控制台窗口的模式进行说明,根据“vs2010连接数据库”文章中代码来进行修改,修改部分用红色来表示:using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Oracle.DataAccess.Client;
namespace dbtest2
{
> {
static void Main(string[] args)
{
string CONN_STR = "Data Source=(DESCRIPTION="
+ "(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.128.152)(PORT=1521)))"
+ "(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=LYNN)));"
+ "User>
string queryString = "SELECT> if (string.IsNullOrEmpty(CONN_STR))//指示指定的字符串是 null 还是 Empty 字符串。
{
throw new Exception("数据库访问服务出现故障,请联系晨旭公司!");
}
else
{
OracleConnection conn = null;
OracleCommand command = new OracleCommand(queryString);
Console.WriteLine("{0}", queryString);
conn = new OracleConnection(CONN_STR);
command.Connection = conn;
conn.Open();
Console.WriteLine("正在连接");
OracleDataReader reader = command.ExecuteReader();
try
{
while (reader.Read())
{
Console.WriteLine(reader.GetString(1)+",");
}
}
catch (Exception e)
{
Console.WriteLine("{0}second exception caught",e);
Console.ReadLine();
}
Console.WriteLine("连接成功");
Console.ReadLine();
reader.Close();
if (null != conn)
{
conn.Close();
conn.Dispose();
}
}
}
}
}
页:
[1]