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    {
        // ÒªÌá½»±íµ¥µÄURI×Ö·û´®¡£
        string uriString = "http://localhost:1165/WebTest/MyLogin.aspx";
        ///////////////////////////////////////
        // ´ò¿ªÒ³Ãæ
        ///////////////////////////////////////
        WebClient webClient = new WebClient();
        byte[] responseData = webClient.DownloadData(uriString);
        string srcString = Encoding.UTF8.GetString(responseData);
        ///////////////////////////////////////
        // ÌîÐ´Ò³Ãæ²¢Ìá½»
        ///////////////////////////////////////
        webClient = new WebClient();
        webClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
        // »ñÈ¡Ò³ÃæµÄ VeiwState                
        string viewStateFlag = "id=\"__VIEWSTATE\" value=\"";
        int i = srcString.IndexOf(viewStateFlag) + viewStateFlag.Length;
        int j = srcString.IndexOf("\"",i);
        string viewState = srcString.Substring(i, j-i);
    &nb


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Online active users counter in ASP.NET


Online active users counter in ASP.NET
With this tool which is written for ASP.NET, it is possible to count the number of online users, members and guest users in web sites.
Installation
The tool installation is very simple and only takes a few minutes.
Step one - Add Reference:
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