C#串連Oracle的執行個體教程

這篇文章主要介紹了C#串連Oracle的方法,結合執行個體形式總結分析了幾種常見的C#串連Oracle資料庫的操作技巧與相關注意事項,需要的朋友可以參考下

本文執行個體總結了C#串連Oracle的方法。分享給大家供大家參考，具體如下：

一、通過System.Data.OracleClient(需要安裝Oracle用戶端並配置tnsnames.ora)

1. 添加命名空間System.Data.OracleClient引用

 using System.Data.OracleClient;

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、通過System.Data.OracleClient(需要安裝Oracle用戶端不需配置tnsnames.ora)

1. 添加命名空間System.Data.OracleClient引用

 using System.Data.OracleClient;

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、通過System.Data.OleDb和Oracle公司的驅動

1. 添加命名空間System.Data.OracleClient引用

using System.Data.OleDb;

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、通過System.Data.OleDb和微軟公司的Oracle驅動

1. 添加命名空間System.Data.OracleClient引用

using System.Data.OleDb;

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();}

備忘：

a.XP作業系統已經安裝了微軟公司的Oracle驅動C:\Program Files\Common Files\System\Ole DB\msdaora.dll

b.該驅動需要Oracle用戶端的三個檔案(oraocixe10.dll、oci.dll、ociw32.dll)放在System32下即可

五、使用ODP串連

1. 下載安裝ODP.NET(www.oracle.com/technetwork/developer-tools/visual-studio/downloads/index.html)

2. 安裝完全成後會產生一序列檔案。

3. 找到這個安裝目錄，開啟檔案夾%ORACLE_HOME%\Network\Admin在這個下面建立一個tnsnames.ora的檔案，其內容可以參考其下的Sample目錄下面的配置

Oracle.RACE =(DESCRIPTION=  (ADDRESS_LIST=   (ADDRESS=    (PROTOCOL=TCP)    (HOST=127.0.0.1)    (PORT=1521)   )  )  (CONNECT_DATA=   (SID=RACE)   (SERVER=DEDICATED)  ))

Oracle.RACE為連接字串名稱，可以隨便取。等號後面的字串可以在Enterprise Manager Console工具中串連資料庫後的TNS描述符中拷過來

4. 引用Oracle.DataAccess命名空間

using Oracle.DataAccess.Client;

6. 範例程式碼：

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、使用第三方驅動

第三方驅動有 Devart，下載驅動www.devart.com/dotconnect/oracle/，但是是商業版，需要購買許可或破解

串連格式 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命名空間

using Devart.Data.Oracle;

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();}