Obtain the current geographic location using the IP address

1. interface method:

This method is relatively stable and provides relatively stable data. There are many interfaces to provide. You can refer

Http://www.hujuntao.com/api/the-ip-address-api-and-call-the-interface-method.html

I will not explain them one by one. I will only explain the interfaces provided by Sina:

Sina interface address: http://int.dpool.sina.com.cn/iplookup/iplookup.php

There are two parameters: format and ip

1) IP Address: When the ip address value is not input, the default ip address is the local IP address. You can also specify a specific ip address;

2) format: the data format returned to the client is js and json:

A. Return js format:

Eg: http://int.dpool.sina.com.cn/iplookup/iplookup.php? Format = js & ip = 115.29.28.108

Return result: var remote_ip_info = {"ret": 1, "start": "115.28.0.0", "end": "115.29.0000255", "country": "\ u4e2d \ u56fd ", "province": "\ u5317 \ u4eac", "city": "\ u5317 \ u4eac", "district": "", "isp": "\ u7535 \ u4fe1 ", "type": "\ u673a \ u623f", "desc": "\ u4e2d \ u56fd \ u4e07 \ u7f51 \ u673a \ u623f \ u7535 \ u4fe1 "};

The returned result is a js variable whose value is in json format. You can transcode Unicode characters to Chinese characters:

Var remote_ip_info = {"ret": 1, "start": "115.28.0.0", "end": "115.29.0000255", "country": "China", "province ": "Beijing", "city": "Beijing", "district": "", "isp": "Telecom", "type": "data center", "desc ": "China hichina data center Telecom "};

B. Return json format:

Eg: http://int.dpool.sina.com.cn/iplookup/iplookup.php? Format = json & ip = 115.29.28.108

Returned results:

{"Ret": 1, "start": "115.28.0.0", "end": "115.29.0000255", "country": "\ u4e2d \ u56fd", "province ": "\ u5317 \ u4eac", "city": "\ u5317 \ u4eac", "district": "", "isp": "\ u7535 \ u4fe1", "type ": "\ u673a \ u623f", "desc": "\ u4e2d \ u56fd \ u4e07 \ u7f51 \ u673a \ u623f \ u7535 \ u4fe1 "}

The returned result is a string in json format. You can transcode Unicode characters to Chinese characters:

{"Ret": 1, "start": "115.28.0.0", "end": "115.29.0000255", "country": "China", "province": "Beijing ", "city": "Beijing", "district": "", "isp": "Telecom", "type": "data center", "desc ": "China hichina data center Telecom "}

Sample Code:

Runat = CellPadding = ForeColor = GridLines = AutoGenerateColumns => <AlternatingRowStyle BackColor =/> <EditRowStyle BackColor =/> <FooterStyle BackColor = Font-Bold = ForeColor =/> <HeaderStyle BackColor = font-Bold = ForeColor =/> <PagerStyle BackColor = ForeColor = HorizontalAlign =/> <RowStyle BackColor =/> <SelectedRowStyle BackColor = Font-Bold = ForeColor =/> <SortedAscendingCellStyle BackColor = /> <SortedAscendingHeaderStyle BackColor =/> <SortedDescendingCellStyle BackColor =/> <SortedDescendingHeaderStyle BackColor =/> <Columns> <asp: templateField HeaderText => <ItemTemplate> <div style => <% # Eval () %> </div> </ItemTemplate> </asp: TemplateField> <asp: templateField HeaderText => <ItemTemplate> <div style => <% # Eval () %> </div> </ItemTemplate> </asp: TemplateField> <asp: templateField HeaderText => <ItemTemplate> <div style => <% # Eval () %> </div> </ItemTemplate> </asp: TemplateField> <asp: templateField HeaderText => <ItemTemplate> <div style => <% # Eval () %> </div> </ItemTemplate> </asp: TemplateField> <asp: templateField HeaderText => <ItemTemplate> <div style => <% # Eval () %> </div> </ItemTemplate> </asp: TemplateField> <asp: templateField HeaderText => <ItemTemplate> <div style => <% # Eval () %> </div> </ItemTemplate> </asp: TemplateField> <asp: templateField HeaderText => <ItemTemplate> <div style => <% # Eval () %> </div> </ItemTemplate> </asp: TemplateField> <asp: templateField HeaderText => <ItemTemplate> <div style => <% # Eval () %> </div> </ItemTemplate> </asp: templateField> </Columns> </asp: GridView> </div>View Code ips = List <> list = List <IPDetail> (ips! = & Ips. Count> (ip rs =, result = (! Int32.TryParse (result, = (obj! = Ipd = obj [= obj [= obj [= obj [= obj [= obj [= obj [= obj [=View Code ConvertUnicode2Chinese (= Regex (reg. Replace (result, () Convert. ToInt32 (m. Groups []. Value,View Code PostDataToUrl (System. net. httpWebRequest request = (System. net. httpWebRequest) System. net. httpWebRequest. create (==== (System. IO. memoryStream MS = (I =; I <data. count; I ++ = (I >== (System. IO. stream requestStream = (System. net. httpWebResponse response = (System. IO. stream stream = (System. IO. streamReader reader = result =View Code

Running effect:

2. directly request the webpage:

This method is not recommended. It is very unstable to obtain html information from the webpage. Once other people's webpage templates or styles change, their code will also change, which is a headache, generally, this method is not recommended. It is best to use APIs provided by others to find interfaces. The following provides an address for interested people to study:

Http://www.jb51.net/article/33540.htm