. NET (C #) calls webService to obtain the region of the Client IP address (non-asynchronous ),

. NET (C #) calls webService to obtain the region of the Client IP address (non-asynchronous ),
Function Description:

This interface is used to obtain the region (country, city, etc.) of the IP address accessed by the client ). Enter an IP address to query country, city, owner, and other information. If the country is not specified, enter the China parameter: IP address (automatically replaced ". "."), Return data: A one-dimensional String array String (1), String (0) = IP address; String (1) = country, city, owner, etc.

1.1.1. interface address

Webservice method:

Example: http://webservice.webxml.com.cn/WebServices/IpAddressSearchWebService.asmx? Op = getCountryCityByIp

1.1.2. Method Name

 GetCountryCityByIp

1.1.3. parameter description request parameters:

Parameter Name	Meaning	Type	Required	Remarks
None	32-bit binary	String	Yes	Example: "127.0.0.1"
None	32-bit binary	String	Yes	Example: "218.108.242.108"

Returned results:

Parameter Name	Meaning	Type	Required	Remarks
String [] strArea_IP	Returns an array containing IP information.	String []	No	For example, Count = 2 indicates that the array length is 2 (0, 1)
StrArea_IP [0]	IP Address requested by the client	String	No	Example: "218.108.242.108"
StrArea_IP [1]	Region information of the IP address	String	No	For example, "Zhejiang and Hangzhou"

The following figure shows the region of an IP address:

Based on a third-party website (webservice provider), you can obtain the region of the client's IP address by capturing the IP address of the computer on this website.

Of course, if this website has changed its domain name or does not exist that day, this method will not work properly!

The next thing is very simple. Add the preceding webservice to the project, and then call this webservice to obtain the Internet access area.

The code is implemented as follows:

/// <Summary> /// region where the Internet IP address is located /// </summary> /// <returns> </returns> private string GetConnectNetAddressArea () {string strIP = "218.108.242.108; // The requested IP address IpAddressSearchWebService webService = new IpAddressSearchWebService (); string [] strArea_IP = webService. getCountryCityByIp (strIP); return strArea_IP [1]; // return result: "Hangzhou, Zhejiang Province "}View Code

 

 

Net is C/S.

The program system is divided into B/S and C/S. C/S indicates the Client/Server, the client is the machine that enjoys the service, and the server is the machine that provides the service.
For example, if you buy breakfast, the breakfast is the server, and the breakfast service is provided. We are the client to enjoy the services provided. The communication between the two parties is initiated by the client.
In a computer, the client is an interface written in C # Or VB. The server is a database and provides data services. The C/S program needs to download the client.
Common C/S programs and QQ games.

What does {0: C} mean in net?

Format characters when the output content is used. {n} represents a placeholder. For example, {0} indicates that the output position is replaced by the first parameter. C is the specific formatting control information, for example, the currency information to be output.
Where:
C | C: currency format
D | D: represents the decimal format
E | E: representing the scientific count (INDEX) Format
F | F: Floating Point format
X | X: hexadecimal format.

In addition, this output method is used in the C # language, and. net is a development platform.