6-06.aspx

这是一个很好的基于数据库的系统

<% @ Page Language="C#" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.OleDb" %>
<script runat="server">
void Page_Load(Object sender, EventArgs e) {
   OleDbConnection Conn=new OleDbConnection(); 
   Conn.ConnectionString="Provider=Microsoft.Jet.OLEDB.4.0;"+
                       "Data Source="+Server.MapPath("person.mdb");
   Conn.Open();
   String strSQL="select avg(数学)  from grade";
   OleDbCommand Comm=new OleDbCommand(strSQL,Conn);
   Double d=(Double)Comm.ExecuteScalar();  
   Message.Text="所有人数学的平均成绩为"+d.ToString()+"分";
   Conn.Close();
}
</script>
<asp:Label id="Message" runat="server" />