C#获取用户登录IP地址
public static string GetUserIp() { string ip; string[] temp; bool isErr = false; if (System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_ForWARDED_For"] == null) { ip = System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"].ToString(); } else { ip = System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_ForWARDED_For"].ToString(); } if (ip.Length > 15) { isErr = true; } else { temp = ip.Split('.'); if (temp.Length == 4) { for (int i = 0; i < temp.Length; i++) { if (temp[i].Length > 3) isErr = true; } } else isErr = true; } if(isErr) { return "1.1.1.1"; } else { return ip; } }