Question

我正在开发一个MVC.ASP.Net应用程序。我正在尝试查找各自国家/地区的公共IP地址。

Public static string GetIP()
{
     string IPAddress = null;


     IPAddress = WDA.CMS.Services.CacheService.getPublicIP;

     using (System.Net.WebClient wc = new System.Net.WebClient())
     {
         // Take long time to respond.
         IPAddress = wc.DownloadString("http://icanhazip.com/"); 
     }

     if (!string.IsNullOrEmpty(IPAddress))
     {
         System.Text.RegularExpressions.Regex regex = new System.Text.RegularExpressions.Regex("(\\d{1,3}\\.){3}\\d{0,3}");
         if (IPAddress != null)
         {
             if (regex.IsMatch(IPAddress))
             {
                 IPAddress = regex.Match(IPAddress).Value.ToString();
             }
             else
             {
                 IPAddress = "";
             }
             regex = null;
        }

     }

     return IPAddress;
}

//如果是美国：209.105.127.206

此功能正常工作但我正在尝试改善响应时间，因为多次调用此函数。是否可以修改此函数以更快地检索结果。任何帮助/建议将受到高度赞赏。

Answer 1

缓存它。即

public JsonResult Search(string term)
{
    List<string> lstADUsers = new List<string>();       
    if (!string.IsNullOrEmpty(term))
    {
        using (var context = new PrincipalContext(ContextType.Domain, null, "LDAP"))
        {   
            UserPrincipal user = new UserPrincipal(context);
            using (var searcher = new PrincipalSearcher(new UserPrincipal(context)))
            {                  
                foreach (var result in searcher.FindAll().Where(m => m.SamAccountName.StartsWith(term, StringComparison.OrdinalIgnoreCase)))
                {
                    DirectoryEntry de = result.GetUnderlyingObject() as DirectoryEntry;                     
                    string usersWithName;
                    if (!String.IsNullOrEmpty((String)de.Properties["samaccountname"].Value) && !String.IsNullOrEmpty((String)de.Properties["sn"].Value) && !String.IsNullOrEmpty((String)de.Properties["givenName"].Value))
                    {
                        usersWithName = de.Properties["samaccountname"].Value.ToString();
                        lstADUsers.Add(usersWithName);
                    }
                }
            }
        }
    }

    return Json(lstADUsers, JsonRequestBehavior.AllowGet);
}

性能：在C＃中获取公共IP地址

1 个答案: