一个简单的.NET泛域名解析,应用在自助建站。

using   System;   
  using   System.Data;   
  using   System.Configuration;   
  using   System.Web;   
  using   System.Web.Security;   
  using   System.Web.UI;   
  using   System.Web.UI.WebControls;   
  using   System.Web.UI.WebControls.WebParts;   
  using   System.Web.UI.HtmlControls;   
  using   System.Data.SqlClient;   
  using   System.Text.RegularExpressions;   
    
  public   partial   class   _Default   :   System.Web.UI.Page     
  {   
          public   SqlCommand   Cmd;   
          public   SqlConnection   Conn;   
          public   DataSet   Ds   =   new   DataSet();   
          public   SqlDataAdapter   Da;   
          public   string   SqlStr;       //定义SQL语句   
    
          protected   void   Page_Load(object   sender,   EventArgs   e)   
          {   
                  if   (!Page.IsPostBack)     
                  {   
                          string   getUrl,userUrl;   
                          getUrl   =   Request.Url.AbsoluteUri;         //获取URL(后面有"/index.aspx")   
    
                          //判断URL是否为空(似乎没什么用)   
                          if   (getUrl   !=   "")   
                          {   
                                  userUrl   =   getUrl.Replace("http://",   "");         //将URL中的"http://"去掉   
                                  userUrl   =   userUrl.Replace("www.",   "");     //将URL中的"www."去掉   
                                  userUrl   =   userUrl.Split('.')[0];     //取字符串第一个点之前的部分   
                                  //Response.Write(userUrl);       //输出筛选后的用户名   
                                  //Response.Write(getUrl);       //输出Url   
    
                                  //判断用户输入的URL是否符合要求(只允许"http://www.***.lilong.com"和"http://***.lilong.com")   
                                  if   (getUrl   !=   "http://www."   +   userUrl   +   "lilong.com/index.aspx"   &&   getUrl   !=   "http://"   +   userUrl   +   "lilong.com/index.aspx")   
                                  {   
                                          //此处处理错误(URL不符合规范)   
                                  }   
    
                                  string   conStr   =   ConfigurationSettings.AppSettings["constr_2000"];       //获取连接字符串   
                                  Conn   =   new   SqlConnection(conStr);       //连接数据库   
                                  Conn.Open();   //开启数据库   
                                  SqlStr   =   "select   U_Name   from   T_User   where   U_Name   =   '"   +   userUrl   +   "'";   //构建SQL语句   
                                  Da   =   new   SqlDataAdapter(SqlStr,   Conn);   //执行SQL语句   
                                  Da.Fill(Ds,   "T_User");   
                                  Conn.Close();   //关闭数据库   
    
                                  if   (Ds.Tables["T_User"].Rows.Count   >   0)   
                                  {   
                                          //此处处理用户   
                                  }   
                                  else   
                                  {   
                                          //跳到出错页(没有当前用户)   
                                  }   
                          }   
                          else   
                          {   
                                  //跳到出错页(URL为空)   
                          }   
                  }   
          }   
  } 

http://topic.csdn.net/t/20060328/10/4644822.html#