c#.net(B/s)读取默认配置文档内容及连接数据库

1.读取默认文档中connectionStrings内的name=sqlconnectingstring的connectionString值
string sqlstr = System.Configuration.ConfigurationManager.ConnectionStrings["sqlconnectingstring"].ConnectionString;

２.access
public static OleDbConnection createconn()
{
string accpath = System.Configuration.ConfigurationManager.ConnectionStrings["dbpath"].ConnectionString;
accpath = System.Web.HttpContext.Current.Server.MapPath(accpath);
OleDbConnection accessconn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data source=" + accpath);
return accessconn;
}

3.mssql
public static SqlConnection sqlcreate()
{
string sqlstr = System.Configuration.ConfigurationManager.ConnectionStrings["sqlconnectingstring"].ConnectionString;
SqlConnection sqlconn = new SqlConnection(sqlstr);
return sqlconn;
}
别忘了引用数据库操作类