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导读本文章相关技术整理于CSDN论坛如何防止控制客户端使其用同一帐户重复登录系统.解决思路:维护一online表,查看有登陆,就不允许再次登陆,以sessionid作为唯一标识符号,也可以产生一个GUI... 本文章相关技术整理于CSDN论坛如何防止控制客户端使其用同一帐户重复登录系统. 解决思路: 维护一online表,查看有登陆,就不允许再次登陆,以sessionid作为唯一标识符号,也可以产生一个GUID发到COOKIE中,以区分不同的CLIENT,再佐以JS,可以达到更好的效果,比如离开后自动离线 解决代码: public virtual void Application_Start(object sender, EventArgs e) ??{ ???// reset the mailer indicator ???Application["MailerStatus"] = "All Mailings Complete"; ???// initialize a datatable for users online ???DataTable objUserTable = new DataTable(); objUserTable.Columns.Add("SessionID",System.Type.GetType("System.Guid")); objUserTable.Columns.Add("PeopleID",System.Type.GetType("System.Int32")); objUserTable.Columns.Add("ShowDetail",System.Type.GetType("System.Boolean")); ???DataColumn[] pk = new DataColumn[1]; ???pk[0] = objUserTable.Columns[0]; ???objUserTable.PrimaryKey = pk; ???Application["UserTable"] = objUserTable; ??} ? ??/// ??/// The Session_Start event adds user session information to ??/// Application["UserTable"]. ??/// ??public virtual void Session_Start(object sender, EventArgs e) ??{ ???Application.Lock(); ???//Application.Lock (); ?DataTable objUserTable = (DataTable)Application["UserTable"]; ???DataRow objRow = objUserTable.NewRow(); ???Guid objGuid = Guid.NewGuid(); ???objRow[0] = objGuid; ???Session["PfSessionID"] = objRow[0]; ???objRow[1] = 0; ???objRow[2] = false; ???objUserTable.Rows.Add(objRow); ???Application["UserTable"] = objUserTable; ???Application.UnLock(); ??} ? ??/// ?/// The Session_End event deletes user session information from ??/// Application["UserTable"]. ??/// ??public virtual void Session_End(object sender, EventArgs e) ??{ ???Application.Lock(); ??DataTable objUserTable = (DataTable)Application["UserTable"]; ??objUserTable.Rows.Find((Guid)Session["PfSessionID"]).Delete(); ???Application["UserTable"] = objUserTable; ???Application.UnLock(); ??} |
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