[英]Connecting Error to Remote Oracle XE database using ASP.NET
我已經在開發計算機上安裝了Oracle XE,並且運行正常。
然后,我在測試計算機上安裝了Oracle XE客戶端,它也可以正常工作,並且可以從瀏覽器訪問Development PC數據庫。
現在,我想創建一個可以訪問該Oracle XE數據庫的ASP.Net應用程序。 我也嘗試過,但是它總是在我的TEST計算機上顯示一個錯誤,該錯誤使用ASP.Net將數據庫連接到開發計算機。
這是我的ASP.Net應用程序代碼:
protected void Page_Load(object sender, EventArgs e)
{
string connectionString = GetConnectionString();
OracleConnection connection = new OracleConnection(connectionString);
connection.Open();
Label1.Text = "State: " + connection.State;
Label1.Text = "ConnectionString: " + connection.ConnectionString;
OracleCommand command = connection.CreateCommand();
string sql = "SELECT * FROM Users";
command.CommandText = sql;
OracleDataReader reader = command.ExecuteReader();
while (reader.Read())
{
string myField = (string)reader["nID"];
Console.WriteLine(myField);
}
}
static private string GetConnectionString()
{
// To avoid storing the connection string in your code,
// you can retrieve it from a configuration file.
return "User Id=System;Password=admin;Data Source=(DESCRIPTION=" +
"(ADDRESS=(PROTOCOL=TCP)(HOST=myServerAddress)(PORT=1521))" +
"(CONNECT_DATA=(SERVICE_NAME=)));";
}
確保打開了oracle監聽器。
ps -ef | grep ls
oracle 3773 1 0 May24 ? 00:00:00 /usr/local/oracle/product/10.2.0.1.0/bin/tnslsnr LISTENER -inherit
開始這個聽眾
[root@rce-dev2 ~]# su - oracle
-bash-3.2$ cd $ORACLE_HOME
-bash-3.2$ cd bin
-bash-3.2$ ls *ls*
-bash-3.2$ lsnrctl
LSNRCTL for Linux: Version 10.2.0.1.0 - Production on 25-MAY-2012 11:53:10
Copyright (c) 1991, 2005, Oracle. All rights reserved.
Welcome to LSNRCTL, type "help" for information.
LSNRCTL> start
Starting /usr/local/oracle/product/10.2.0.1.0/bin/tnslsnr: please wait...
TNSLSNR for Linux: Version 10.2.0.1.0 - Production
System parameter file is /usr/local/oracle/product/10.2.0.1.0/network/admin/listener.ora
Log messages written to /usr/local/oracle/product/10.2.0.1.0/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rce-dev2.microlink.com.my)(PORT=1521)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=rce-dev2.microlink.com.my)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 10.2.0.1.0 - Production
Start Date 25-MAY-2012 11:53:54
Uptime 0 days 0 hr. 0 min. 0 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /usr/local/oracle/product/10.2.0.1.0/network/admin/listener.ora
Listener Log File /usr/local/oracle/product/10.2.0.1.0/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rce-dev2.microlink.com.my)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
你可以試試這個
"User Id=System;Password=admin;Data Source=(DESCRIPTION=" +
"(ADDRESS=(PROTOCOL=TCP)(HOST=myServerAddress)(PORT=1521))" +
"(CONNECT_DATA=(SID=NETBDS)));";*
您不需要連接字符串中的服務名稱嗎? 例如,
return "User Id=System;Password=admin;Data Source=(DESCRIPTION=" +
"(ADDRESS=(PROTOCOL=TCP)(HOST=myServerAddress)(PORT=1521))" +
"(CONNECT_DATA=(SERVICE_NAME=myDBServiceName)));";
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