本文实例总结了C#连接Oracle的方法。分享给大家供大家参考，具体如下：
一、通过System.Data.OracleClient(需要安装Oracle客户端并配置tnsnames.ora)
1. 添加命名空间System.Data.OracleClient引用
2.
|
1
|
using System.Data.OracleClient; |
3.
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
string connString = "User ID=IFSAPP;Password=IFSAPP;Data Source=RACE;";OracleConnection conn = new OracleConnection(connString);try{ conn.Open(); MessageBox.Show(conn.State.ToString());}catch (Exception ex){ ShowErrorMessage(ex.Message.ToString());}finally{ conn.Close();} |
二、通过System.Data.OracleClient(需要安装Oracle客户端不需配置tnsnames.ora)
1. 添加命名空间System.Data.OracleClient引用
2.
|
1
|
using System.Data.OracleClient; |
3.
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
string connString = "User ID=IFSAPP;Password=IFSAPP;Data Source=(DESCRIPTION = (ADDRESS_LIST= (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = RACE)))";OracleConnection conn = new OracleConnection(connString);try{ conn.Open(); MessageBox.Show(conn.State.ToString());}catch (Exception ex){ ShowErrorMessage(ex.Message.ToString());}finally{ conn.Close();} |
三、通过System.Data.OleDb和Oracle公司的驱动
1. 添加命名空间System.Data.OracleClient引用
2.
|
1
|
using System.Data.OleDb; |
3.
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
string connString = "Provider=OraOLEDB.Oracle.1;User ID=IFSAPP;Password=IFSAPP;Data Source=(DESCRIPTION = (ADDRESS_LIST= (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = RACE)))";OleDbConnection conn = new OleDbConnection(connString);try{ conn.Open(); MessageBox.Show(conn.State.ToString());}catch (Exception ex){ ShowErrorMessage(ex.Message.ToString());}finally{ conn.Close();} |
四、通过System.Data.OleDb和微软公司的Oracle驱动
1. 添加命名空间System.Data.OracleClient引用
2.
|
1
|
using System.Data.OleDb; |
3.
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
string connString = "Provider=MSDAORA.1;User ID=IFSAPP;Password=IFSAPP;Data Source=(DESCRIPTION = (ADDRESS_LIST= (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = RACE)))";OleDbConnection cnn = new OleDbConnection(connString);try{ conn.Open(); MessageBox.Show(conn.State.ToString());}catch (Exception ex){ ShowErrorMessage(ex.Message.ToString());}finally{ conn.Close();} |
备注：
a.XP操作系统已经安装了微软公司的Oracle驱动C:\Program Files\Common Files\System\Ole DB\msdaora.dll
b.该驱动需要Oracle客户端的三个文件(oraocixe10.dll、oci.dll、ociw32.dll)放在System32下即可
五、使用ODP连接
1. 下载安装ODP.NET(http://www.oracle.com/technetwork/developer-tools/visual-studio/downloads/index.html)
2. 安装完全成后会产生一序列文件。
3. 找到这个安装目录，打开文件夹%ORACLE_HOME%\Network\Admin在这个下面建立一个tnsnames.ora的文件，其内容可以参考其下的Sample目录下面的配置
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
|
Oracle.RACE =(DESCRIPTION= (ADDRESS_LIST= (ADDRESS= (PROTOCOL=TCP) (HOST=127.0.0.1) (PORT=1521) ) ) (CONNECT_DATA= (SID=RACE) (SERVER=DEDICATED) )) |
Oracle.RACE为连接字符串名称，可以随便取。等号后面的字符串可以在Enterprise Manager Console工具中连接数据库后的TNS描述符中拷过来
4. 引用Oracle.DataAccess命名空间
5.
|
1
|
using Oracle.DataAccess.Client; |
6. 示例代码：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
|
string connString = "DATA SOURCE=Oracle.RACE;PERSIST SECURITY INFO=True;USER ID=IFSAPP;password=IFSAPP";OracleConnection conn = new OracleConnection(connString);try{ conn.Open(); OracleCommand cmd = new OracleCommand(cmdText,conn); OracleDataReader reader = cmd.ExecuteReader(); this.DataGridView1.DataSource = reader; this.DataGridView1.DataBind();}catch (Exception ex){ ShowErrorMessage(ex.Message.ToString());}finally{ conn.Close();} |
六、使用第三方驱动
第三方驱动有 Devart，下载驱动 http://www.devart.com/dotconnect/oracle/，但是是商业版，需要购买许可或破解
连接格式 User ID=myUsername;Password=myPassword;Host=ora;Pooling=true;Min Pool Size=0;Max Pool Size=100;Connection Lifetime=0;
1. 引用Devart.Data.Oracle命名空间
2.
|
1
|
using Devart.Data.Oracle; |
3.
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
OracleConnection conn = new OracleConnection();conn.ConnectionString = "";conn.Unicode = true;conn.UserId = "IFSAPP";conn.Password = "IFSAPP";conn.Port = 1521;conn.Server = "127.0.0.1";conn.Sid = "RACE";try{ conn.Open(); //execute queries, etc}catch (Exception ex){ ShowErrorMessage(ex.Message.ToString());}finally{ conn.Close();} |
希望本文所述对大家C#程序设计有所帮助。
