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#region ÓòÃû°ó¶¨·½·¨
    public static void AddHostHeader(int siteid, string ip, int port, string domain)//Ôö¼ÓÖ÷»úÍ·£¨Õ¾µã±àºÅ.ip.¶Ë¿Ú.ÓòÃû£©
    {
        DirectoryEntry site = new DirectoryEntry("IIS://localhost/W3SVC/" + siteid);
        PropertyValueCollection serverBindings = site.Properties["ServerBindings"];
        string headerStr = string.Format("{0}:{1}:{2}", ip, port, domain);
        if (!serverBindings.Contains(headerStr))
        {
          serverBindings.Add(headerStr);
        }
        site.CommitChanges();
    }
    #endregion
    #region ɾ³ýÖ÷»úÍ·
    public static void DeleteHostHeader(int siteid, string ip, int port, string domain)//ɾ³ýÖ÷»úÍ·£¨Õ¾µã±àºÅ.ip.¶Ë¿Ú.ÓòÃû£©
    {
        DirectoryEntry site = new DirectoryEntry("IIS://localhost/W3SVC/" + siteid);
        PropertyValueCollection serverBindings = site.Properties["ServerBindings"];
        string headerStr = string.Format("{0}:{1}:{2}", ip, port, domain);
        if (serverBindings.Contains(headerStr))
        {
            serverBindings.Remove(headerStr);
        }
        site.CommitChanges();
    }
    #endregion