怎样获得web.config文件中的连接串？
我的ASP.net中需要使用数据库连接串，
Dim   MyConnectionString   As   String   =？？？？？‘web.config中有设置好的数据库连接串，怎么引用？

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ConfigurationSettings.AppSettings[ "DBConfig "].ToString();
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using System.Configuration ;

string conn = ConfigurationSettings .AppSettings [ "conn "].ToString ();
//AppSettings [ "conn "]中的conn为WebConfig中的数据连接字符串
SqlConnecion sqlcon = new sqlConncection(conn);

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using System.Configuration;

如果是下面类型：
<appSettings>
<add key= "SQLConnectionString " value= "data source=winter;uid=sa;pwd=;database=pubs;pooling=true "> </add>
</appSettings>
那么：
static string _connectionString = ConfigurationManager.AppSettings[ "SQLConnectionString "];

如果是下面类型：
<connectionStrings>
<add name= "PubsConnectionString " connectionString= "Data Source=localhost;Initial Catalog=pubs;Integrated Security=True "
providerName= "System.Data.SqlClient " />
</connectionStrings>
那么：
static string _connectionString = ConfigurationManager.ConnectionStrings[ "PubsConnectionString "].ConnectionString;