【 tulaoshi.com - ASP.NET 】
在asp中有多种方法保存数据库连接串，asp+提供了另一种新方式:config.web。quickstart中的许多demo都是直接将连接串写在程序中。这对于demo用途是没有问题，但在实际使用中是不行的。<br
<br
本文示范如何使用config.web来存储连接串。在每页asp.net中你只需用<br
调出来就可以直接使用了。这样做的好处一是安全，二是方便，改密码时只需改一个地方即可。<br
<br
废话少说，这里就是code:(放在该application的根目录下)<br
<br
Config.web<br
<configuration <br
<appsettings<br
<add key="MyConn" value="server=localhost;uid=sa;pwd=mypassword;Database=somedatabase"/<br
</appsettings<br
</configuration<br
<br
<br
Somepage.aspx<br
<%@ Import Namespace="System.Data" %<br
<%@ Import Namespace="System.Data.SQL" %<br
<br
<script language="VB" runat="server"<br
<br
Sub Page_Load(Src As Object, E As EventArgs) <br
<br
'This is the meat of calling the DSN out of the config.web<br
<br
'Setting a local variable to hold the connection string variable<br
Dim MyConnection As SQLConnection<br
Dim Config as HashTable<br
<br
'Setting a local variable to hold the connection string<br
Config = Context.GetConfig("appsettings")<br
MyConnection = New SQLConnection(Config("MyConn"))<br
<br
'Setting a command object to insert some data into a database<br
Dim MyCommand As SQLCommand<br
<br
dim parm1 as string = "SomeTextValue"<br
dim parm2 as string = "SomeTextValue2"<br
<br
Dim InsertCmd As String = "Insert into tablename values (@parm1, @parm2)"<br
<br
'Using the connection string<br
MyCommand = New SQLCommand(InsertCmd, MyConnection)<br
<br
MyCommand.Parameters.Add(New SQLParameter("@Parm1", SQLDataType.VarChar, 50))<br
MyCommand.Parameters("@Parm1").Value = Parm1<br
<br
MyCommand.Parameters.Add(New SQLParameter("@Parm2", SQLDataType.VarChar, 50))<br
MyCommand.Parameters("@Parm2").Value = Parm2<br
<br
MyCommand.ActiveConnection.Open()<br
MyCommand.Execute()<br
MyCommand.ActiveConnection.Close()<br
<br
End Sub<br
</script<br
<br
讨饭猫 翻译自aspfree.com<br
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（本文来源于图老师网站，更多请访问https://www.tulaoshi.com）
