.net常用的方法

       //用javascript判断是否去那个页面
      Response.Write("<script language=\"javascript\" type=\"text/javascript\">");
      Response.Write("if(confirm('是否去那个页面。')){ document.URL='LookContent.aspx'}");
      Response.Write("</script>");

      //传递信息时如果有中文最好用以下函数转换一下HttpUtility.UrlEncode()
      http://www.abc.com/SameArticle.aspx?type=classify&title=" + HttpUtility.UrlEncode("标题")

      //获取某页面传递过来的问号信息
      Request.QueryString["title"]

      //获取服务器路径
      System.Web.HttpRuntime.AppDomainAppPath 

      //日期胡乱转换
      string dtString = "19831015121015";
      IFormatProvider culture = new System.Globalization.CultureInfo("zh-CN", true);
      DateTime dt = DateTime.ParseExact(dtString, "yyyyMMddHHmmss", culture, DateTimeStyles.NoCurrentDateDefault); //大写HH是24小时制,小写hh是12小时制
      Console.WriteLine(dt.ToString());


      //DataTable 排序方法
        DataView dvBriefing = dtBriefing.DefaultView;
        dvBriefing.Sort = "CommentCount DESC";
        dtBriefing = dvBriefing.ToTable();


      //Asp.net 快速写txt文件
      StreamWriter swOutTime = new StreamWriter("c:\\TempOutTime.txt", true, System.Text.Encoding.GetEncoding("GB2312"));
      swOutTime.Write("写入txt文件");
      swOutTime.Flush();
      swOutTime.Close();

      //Asp.net DataTable写XML
      1、写用dtBriefing.WriteXml("C:\\temp.xml", XmlWriteMode.WriteSchema);
      2、读用DataSet dllxml = new DataSet();
                    dllxml.ReadXml("C:\\temp.xml");
                    dtBriefing = dllxml.Tables[0]; 
          
        // 判断是否合法的IP地址
        static private bool isIpAdd(string url)
        {
            url = CleanURL(url);
            System.Text.RegularExpressions.Regex reg = new System.Text.RegularExpressions.Regex(@"(\d{1,3}\.){3}\d{1,3}");
            if (url == reg.Match(url).ToString())
            {
                if (reg.Match(url).Success)
                {
                    string[] ips = url.Split('.');
                    if (ips.Length == 4 || ips.Length == 6)
                    {
                        if (System.Int32.Parse(ips[0]) < 256 && System.Int32.Parse(ips[1]) < 256 & System.Int32.Parse(ips[2]) < 256 & System.Int32.Parse(ips[3]) < 256)
                            return true;
                        else
                            return false;
                    }
                }
            }
            return false;
        }