asp.net网络考试系统分析⑶

<% @ Page Language="C#" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.OleDb" %>
<Script runat="server">
string Lesson;
string No;
string Name;
OleDbDataReader dr;
string SQL;
OleDbConnection Conn;
OleDbCommand Comm;
void Page_Load(Object Src, EventArgs E) {
 Lesson = Request["Lesson"];
 No = Request["No"];
 Name = Request["Name"];
 Conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;"+
  "Data Source="+Server.MapPath("test.mdb"));
 Conn.Open();
 SQL = "Select * from " + Lesson;
    //Response.Write(SQL);
 Comm = new OleDbCommand(SQL,Conn);
 dr = Comm.ExecuteReader();
}
//如果<60分,显示为红色
string TestResult(string inputScore){
 int Score = Convert.ToInt32(inputScore);
 if (-1 == Score) {
  return "你还没有考试";
 }
 else if(Score < 60) {
  return "<FONT Color=Red>" + Score + "</FONT>";
 }
 else {
  return Score.ToString();
 }
}

</Script>
<HTML>
 <BODY BGCOLOR="BEIGE">
 <H2>成绩单<HR></H2>
<%
 int Score = 0;
 while (dr.Read()) {
  if (Request["No" + dr["题号"].ToString()] != null) {
   string Sel = Request["No" + dr["题号"].ToString()];
   string Ans = dr["解答"].ToString();
   //Response.Write(Sel + Ans + "<br>");
   if (Ans == Sel)
   {
    Score = Score + Convert.ToInt32(dr["分数"].ToString());
                //Response.Write( "OK" + Score);
   }
  }
 }
 //重新建立DataReader对象,需要重新打开Connection对象
 Conn.Close();
 Conn.Open();
 SQL = "Select * From 成绩单 ";
 SQL = SQL + "Where 学号=" + "'" + No + "'" + " And 姓名='" + Name + "'";
 Comm = new OleDbCommand(SQL,Conn);
 OleDbDataReader drScore = Comm.ExecuteReader();
 if(drScore.Read()){
  if (drScore[Lesson].ToString() == "-1") {
  SQL = "update 成绩单 set " + Lesson + " = "  + Score.ToString()
    + " where 学号=" + "'" + No + "'"
    + " And 姓名='" + Name + "'";
  Conn.Close();
  Conn.Open();
  Comm = new OleDbCommand(SQL,Conn);
  Comm.ExecuteNonQuery();
 }
 else {
  Response.Write ("<script>{alert('你已经考过了')}</script>");
  }
 }
%>
 <%=Name%>同志你好,你的考试成绩统计为:<BR>
 <CENTER>
   <TABLE BORDER=2 BGCOLOR="#F1F1F1" WIDTH=80%>
   <TR BGCOLOR="#DDDDDD"><TD>你参加的科目</TD><TD>你的分数</TD></TR>
<%//重新读取成绩
 Conn.Close();
 Conn.Open();
 SQL = "Select * From 成绩单 ";
 SQL = SQL + "Where 学号=" + "'" + No + "'" + " And 姓名='" + Name + "'";
 Comm = new OleDbCommand(SQL,Conn);
 drScore = Comm.ExecuteReader();
 if(drScore.Read()){
 %>
   <TR><TD>ASP</TD><TD Align=Right><%=TestResult(drScore["ASP"].ToString())%></TD></TR>
   <TR><TD>XML</TD><TD Align=Right><%=TestResult(drScore["XML"].ToString())%></TD></TR>
 <% }  %>
   </TABLE></center>
 <HR>
 <A HREF="login.aspx?txtNo=<%=No%>&txtName=<%=Name%>">参加其他科目考试</A>
 </BODY>
</HTML>

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