数据库连接字在Web.config里的用法

Question

应该太全了吧,呵呵
它通过XML来记录这些信息.具体的是在<appSettings>....</appSettings>这个标记中来记录的.这里请看一个ORACLE的例子如下:<appSettings>
<add key="ORACLEConnectionString" value="Provider=OraOLEDB.Oracle.1;
Persist Security Info=False;Password=blah;User ID=greg;Data Source=sph;" />
<add key="SQLConnectionString" value="data source=SQL1;initial catalog=ID_V;
integrated security=SSPI;persist security info=False;workstation id=TH03D374;
packet size=4096"/> 
<appSettings>而在你的应用程序中你只要这样写,就可以了,如下:string conn = ConfigurationSettings.AppSettings["ORACLEConnectionString"];
OleDbConnection myConnection = new OleDbConnection(conn);很轻松是吗?不必每次都输入同样的连接字,也不要记住那些讨厌的信息了,只需要起一个好记的名字就可以.好了下面我在来给出其他的一些连接字MYSQL的连接字:
ConnectionString = "Data Source=localhost;" +
"Database=mySQLDatabase;" +
"User ID=myUsername;" +
"Password=myPassword;" +
"Command Logging=false";
OLE DB的:
IBM AS/400 OLE DB 的' VB.NET
Dim oOleDbConnection As OleDb.OleDbConnection
Dim sConnString As String = _
"Provider=IBMDA400.DataSource.1;" & _
"Data source=myAS400DbName;" & _
"User Id=myUsername;" & _
"Password=myPassword"
oOleDbConnection = New OleDb.OleDbConnection(sConnString)
oOleDbConnection.Open()JET OLE DB 的' VB.NET
Dim oOleDbConnection As OleDb.OleDbConnection
Dim sConnString As String = _
"Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=C:\myPath\myJet.mdb;" & _
"User ID=Admin;" & _
"Password=" 
oOleDbConnection = New OleDb.OleDbConnection(sConnString)
oOleDbConnection.Open()Oracle OLE DB 的' VB.NET
Dim oOleDbConnection As OleDb.OleDbConnection
Dim sConnString As String = _
"Provider=OraOLEDB.Oracle;" & _
"Data Source=MyOracleDB;" & _
"User ID=myUsername;" & _
"Password=myPassword" 
oOleDbConnection = New OleDb.OleDbConnection(sConnString)
oOleDbConnection.Open()SQL Server OLE DB 的' VB.NET
Dim oOleDbConnection As OleDb.OleDbConnection
Dim sConnString As String = _
"Provider=sqloledb;" & _ 
"Data Source=myServerName;" & _
"Initial Catalog=myDatabaseName;" & _
"User Id=myUsername;" & _
"Password=myPassword" 
oOleDbConnection = New OleDb.OleDbConnection(sConnString)
oOleDbConnection.Open()Sybase ASE OLE DB 的' VB.NET
Dim oOleDbConnection As OleDb.OleDbConnection
Dim sConnString As String = _
"Provider=Sybase ASE OLE DB Provider;" & _
"Data Source=MyDataSourceName;" & _
"Server Name=MyServerName;" & _
"Database=MyDatabaseName;" & _
"User ID=myUsername;" & _
"Password=myPassword" 
oOleDbConnection = New OleDb.OleDbConnection(sConnString)
oOleDbConnection.Open()SQL Server在System.Data.SqlClient SqlConnection oSQLConn = new SqlConnection();
oSQLConn.ConnectionString = "Data Source=(local);" +
"Initial Catalog=mySQLServerDBName;" +
"Integrated Security=SSPI";
oSQLConn.Open();