数据库连接字在Web.config里的用法

在asp.net中的WEB程序的设置中我们必须用到Web.config来存储数据库连接字.事实上这是个很好的做法,因为可以省去我们很多的麻烦还可以帮助我们避免不必要的错位,是的很多情况下我就是这样做.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();

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