asp.Net 一些常用的方法和类(15)

                    { 
                        string getsqlkey = System.Web.HttpContext.Current.Request.QueryString.Keys[k]; 
                        string getip; 
                        if (System.Web.HttpContext.Current.Request.QueryString[getsqlkey].ToLower().Contains(jk) == true) 
                        { 
                            System.Web.HttpContext.Current.Response.Write("<script Language=JavaScript>alert('请勿提交非法字符!');</" + "script>"); 
                            System.Web.HttpContext.Current.Response.Write("非法操作！系统做了如下记录 ↓" + "<br>"); 
                            if (System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null) 
                            { 
                                getip = System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"]; 
                            } 
                            else 
                            { 
                                getip = System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];