你们帮我看看这段域名解析代码有问题吗？是asp.net的


<%@ Page Language="c#" %>
<%@ Import Namespace=System.Data%>
<%@ Import Namespace=System.Data.OleDb%>
<%@ Import Namespace=System %>
<%
  string str=Request.ServerVariables.Get("SERVER_NAME").ToString();
if (str==Request.ServerVariables.Get("LOCAL_ADDR").ToString());
{
Response.Write ("<HTML></HTML>");
Response.Write(str);
Response.Write("<br>");
Response.Write(Request.ServerVariables.Get("LOCAL_ADDR").ToString());
Response.End();
}
%>        <%
 string url=Request.ServerVariables.Get("SERVER_NAME").ToString();
   Response.Write(url);
  // Response.End();
OleDbDataReader dr;
string strcon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("~//data//db.mdb") + ";User Id=admin;Password=;";
string sql="select * from sheng where  nowurl='"+ url +"'";
OleDbConnection con=new OleDbConnection(strcon);
OleDbCommand com=new OleDbCommand(sql,con);

con.Open();

try
{Response.Write("zhing");
dr=com.ExecuteReader(CommandBehavior.CloseConnection);
}
catch(Exception ex)
{
Response.Write("err");
return;
}
if(!dr.Read())
//string t="dfdfdfd";
//if(t!="dfdfdfd")
//Response.Write("errddfddf");
               Response.Redirect("miss.htm");
             else
                 {
%>
<html>
<frameset border="0" frameborder="no" framespacing="0" rows="0,*">
<!-- <frame src="about:blank" name="TopMusic" frameborder="0">-->
        <frame src="about:blank" frameborder="no" name="Main"> 
<frame src="http://www.51ebm.com" frameborder="no" name="Main">  
<frame>
<noframes>
<body>
您的浏览器不支持。
</body>
</noframes>
</frameset>
</html>
<%
}
%>