sdk/samples/all in on code/Visual Studio 2010/CSASPNETIPtoLocation/App_Code/IPConvert.cs

   1 /**************************** Module Header ********************************\
   2 * Module Name:    IPConvert.cs
   3 * Project:        CSASPNETIPtoLocation
   4 * Copyright (c) Microsoft Corporation
   5 *
   6 * This project illustrates how to get the geographical location from a db file.
   7 * You need install Sqlserver Express for run the web applicaiton. The code-sample
   8 * only support Internet Protocol version 4.
   9 *
  10 * This class use to calculate the IP number from IP address.
  11 *
  12 * This source is subject to the Microsoft Public License.
  13 * See http://www.microsoft.com/opensource/licenses.mspx#Ms-PL.
  14 * All other rights reserved.
  15 *
  16 * THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND,
  17 * EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
  18 * WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.
  19 \*****************************************************************************/
  20
  21
  22 using System;
  23 using System.Collections.Generic;
  24 using System.Linq;
  25 using System.Web;
  26 using System.Text;
  27
  28 namespace CSASPNETIPtoLocation
  29 {
  30     public class IPConvert
  31     {
  32         public static string ConvertToIPRange(string ipAddress)
  33         {
  34             try
  35             {
  36                 string[] ipArray = ipAddress.Split('.');
  37                 int number = ipArray.Length;
  38                 double ipRange = 0;
  39                 if (number != 4)
  40                 {
  41                     return "error ipAddress";
  42                 }
  43                 for (int i = 0; i < 4; i++)
  44                 {
  45                     int numPosition = int.Parse(ipArray[3 - i].ToString());
  46                     if (i == 4)
  47                     {
  48                         ipRange += numPosition;
  49                     }
  50                     else
  51                     {
  52                         ipRange += ((numPosition % 256) * (Math.Pow(256, (i))));
  53                     }
  54                 }
  55                 return ipRange.ToString();
  56             }
  57             catch (Exception)
  58             {
  59                 return "error";
  60             }
  61         }
  62
  63     }
  64 }