我写的程式如下:
...
protected OracleConnection oracleConnection1;
protected OracleCommand oracleCommand1;
private void Page_Load(object sender, System.EventArgs e)
{
oracleCommand1 = new OracleCommand();
oracleConnection1 = new OracleConnection();
oracleCommand1.CommandText = "SELECT * FROM SCOTT.EMP";
oracleConnection1.ConnectionString = "user id=test;data source=richer;password=password";
oracleConnection1.Open();
Response.Write(oracleCommand1.ExecuteNonQuery());
if(oracleConnection1.State==ConnectionState.Open)
{
oracleConnection1.Close();
}
// 在此处放置用户代码以初始化页面
}可是执行的时候,总是报错:
Exception Details: System.InvalidOperationException: Invalid operation. The connection is closed
可是我打开了数据库阿,这到底是怎么回事?急死人了!
...
protected OracleConnection oracleConnection1;
protected OracleCommand oracleCommand1;
private void Page_Load(object sender, System.EventArgs e)
{
oracleCommand1 = new OracleCommand();
oracleConnection1 = new OracleConnection();
oracleCommand1.CommandText = "SELECT * FROM SCOTT.EMP";
oracleConnection1.ConnectionString = "user id=test;data source=richer;password=password";
oracleConnection1.Open();
Response.Write(oracleCommand1.ExecuteNonQuery());
if(oracleConnection1.State==ConnectionState.Open)
{
oracleConnection1.Close();
}
// 在此处放置用户代码以初始化页面
}可是执行的时候,总是报错:
Exception Details: System.InvalidOperationException: Invalid operation. The connection is closed
可是我打开了数据库阿,这到底是怎么回事?急死人了!
{
oracleConnection1 = new OracleConnection();
oracleConnection1.ConnectionString = "user id=test;data source=richer;password=password";
oracleConnection1.Open();
oracleCommand1 = new OracleCommand("SELECT * FROM SCOTT.EMP", oracleConnection1);
Response.Write(oracleCommand1.ExecuteNonQuery());
if(oracleConnection1.State==ConnectionState.Open)
{
oracleConnection1.Close();
}
// 在此处放置用户代码以初始化页面
}
在web.config中加入<appSettings>
<add key="Oracle" value="Data Source=richer;User ID=test;Password=password"/>
</appSettings>
然后
private void Page_Load(object sender, System.EventArgs e)
{
OracleConnection cnn=new OracleConnection(System.Configuration.ConfigurationSettings.AppSettings["Oracle"]);
cnn.Open();
OracleCommand cmd = new OracleCommand();
string strsql = "SELECT * FROM SCOTT.EMP"; Response.Write(cmd.ExecuteNonQuery(strsql ,cnn));
cnn.Close();
// 在此处放置用户代码以初始化页面
}
ODBC
New version:
"Driver={Microsoft ODBC for Oracle};Server=OracleServer.world;Uid=Username;Pwd=asdasd;"
Old version:
"Driver={Microsoft ODBC Driver for Oracle};ConnectString=OracleServer.world;Uid=myUsername;Pwd=myPassword;"
OLEDB, OleDbConnection (.NET)
Standard security:
"Provider=msdaora;Data Source=MyOracleDB;User Id=UserName;Password=asdasd;"
This one's from Microsoft, the following are from Oracle
Standard Security:
"Provider=OraOLEDB.Oracle;Data Source=MyOracleDB;User Id=Username;Password=asdasd;"
Trusted Connection:
"Provider=OraOLEDB.Oracle;Data Source=MyOracleDB;OSAuthent=1;"
OracleConnection (.NET)
Standard:
"Data Source=Oracle8i;Integrated Security=yes";
This one works only with Oracle 8i release 3 or later
Declare the OracleConnection: C#:
using System.Data.OracleClient;
OracleConnection oOracleConn = new OracleConnection();
oOracleConn.ConnectionString = "my connectionstring";
oOracleConn.Open(); VB.NET:
Imports System.Data.OracleClient
Dim oOracleConn As OracleConnection = New OracleConnection()
oOracleConn.ConnectionString = "my connectionstring"
oOracleConn.Open()