避免一个端口有两个以上不同用户名同时登录

来源：互联网发布：centos 7 安装手册编辑：程序博客网时间：2024/04/27 16:56

前台页面

<mce:script type="text/javascript"></mce:script><div class="denglu"> <div class="yonghuming" id="divuserid" runat="server"> <table> <tr valign="top"> <%-- <td class="hfont1" align="center" width=60px> 用户ID:</td>--%> <td class="hfont1" align="center" width="60px"> 用户名:</td> <td> <asp:TextBox ID="UserID" runat="server" Style="font-size: 12px; width: 80px; height: 18px; border: 0; border: #CCCCCC solid 1px; float: left;" mce_Style="font-size: 12px; width: 80px; height: 18px; border: 0; border: #CCCCCC solid 1px; float: left;"></asp:TextBox></td> </tr> </table> </div> <div class="yonghuming" id="divusername" runat="server" style="display: none;" mce_style="display: none;"> <table> <tr valign="top"> <td class="hfont1" align="center" width="60px"> 用户姓名:</td> <td> <asp:Label ID="UserName" runat="server" Style="font-size: 12px; width: 80px; height: 18px; border: 0; float: left;" mce_Style="font-size: 12px; width: 80px; height: 18px; border: 0; float: left;"></asp:Label></td> </tr> </table> </div> <div class="mima" id="divpassword" runat="server"> <table> <tr valign="top"> <td class="hfont1" align="center" width="60px"> 密码</td> <td> <asp:TextBox ID="PassWord" runat="server" Style="font-size: 12px; width: 80px; height: 18px; border: 0; border: #CCCCCC solid 1px; float: left;" mce_Style="font-size: 12px; width: 80px; height: 18px; border: 0; border: #CCCCCC solid 1px; float: left;" TextMode="Password"></asp:TextBox></td> </tr> </table> </div>

后台页面

protected string UserNamestr = ""; //用户名protected string PassWordstr = ""; //密码protected override void PageLoadEvent(object sender, EventArgs e) { Ajax.Utility.RegisterTypeForAjax(typeof(QLJS.Frames.MainContent)); conn.Value = ConnStr; cip.Value = Request.UserHostAddress; UserNamestr = Request.QueryString["UserName"] == null ? string.Empty : Request.QueryString["UserName"].ToString(); PassWordstr = Request.QueryString["PassWord"] == null ? string.Empty : Request.QueryString["PassWord"].ToString(); if (!IsPostBack) { if (UserNamestr != "" && PassWordstr != "") { GetLogin(ConnStr, UserNamestr, PassWordstr); } PageInit(); } }private void PageInit() { if (Session["LoginUserNm"] != null) { UserName.Text = Session["LoginUserNm"].ToString(); divuserid.Style["display"] = "none"; divpassword.Style["display"] = "none"; divusername.Style["display"] = ""; btnlogin.Style["display"] = "none"; btnlogout.Style["display"] = ""; } else { divuserid.Style["display"] = ""; divpassword.Style["display"] = ""; divusername.Style["display"] = "none"; btnlogin.Style["display"] = ""; btnlogout.Style["display"] = "none"; } }[Ajax.AjaxMethod(HttpSessionStateRequirement.ReadWrite)] public string GetLogin(string conn, string userid, string password) { Jasmine jm = new Jasmine(); //DataTable dtUser = SqlHelper.ExecuteDataset(conn, CommandType.Text, string.Format("select UserNm from tb_b_UserInfo where UserID='{0}' and UserPwd='{1}'", userid, jm.ExeEncrpt(password))).Tables[0]; //DataTable dtUser = SqlHelper.ExecuteDataset(conn, CommandType.Text, string.Format("select UserNm,SH,SP,XXWH from tb_b_UserInfo where UserID='{0}' and UserPwd='{1}'", userid, jm.ExeEncrpt(password))).Tables[0]; string sql = string.Format("select UserNm,SH,SP,XXWH from tb_b_UserInfo where UserID='{0}' and UserPwd='{1}'", userid, jm.ExeEncrpt(password)); DataTable dtUser = SqlHelper.ExecuteDataset(conn, CommandType.Text, sql).Tables[0]; if (dtUser.Rows.Count > 0) { HttpContext.Current.Session.Add("LoginUserID", userid); HttpContext.Current.Session.Add("LoginUserNm", dtUser.Rows[0][0].ToString()); HttpContext.Current.Session.Add("LoginUserSH", dtUser.Rows[0][1].ToString()); HttpContext.Current.Session.Add("LoginUserSP", dtUser.Rows[0][2].ToString()); HttpContext.Current.Session.Add("LoginUserXXWH", dtUser.Rows[0][3].ToString()); return dtUser.Rows[0][0].ToString(); } return string.Empty; } [Ajax.AjaxMethod(HttpSessionStateRequirement.ReadWrite)] public string GetLogOut(string conn) { HttpContext.Current.Session.Remove("LoginUserID"); HttpContext.Current.Session.Remove("LoginUserNm"); HttpContext.Current.Session.Remove("LoginUserSH"); HttpContext.Current.Session.Remove("LoginUserSP"); HttpContext.Current.Session.Remove("LoginUserXXWH"); return string.Empty; }