I mainly looked at the http://topic.csdn.net/u/20100907/16/D01D667A-41AA-4A61-B985-8EB612E061AC.html here
The organization has a need to display different Web Pages Based on the devices that visit the website (mobile phones or computers.
I found it online. My summary is that it is best to use the useragent attribute of HTML Dom to determine what devices are accessing the website.
1. html page code:
<Divid = "useragent">
</Div>
<Scripttype = "text/JavaScript">
Document. getelementbyid ("useragent"). innerhtml = navigator. useragent;
// MessageBox. Show (this. webbrowser1.document. getelementbyid ("useragent"). innerhtml );
</SCRIPT>
In this way, the return value of useragent can be obtained.
2. Better understanding of useragent:
The following is an example of four programs.
(1) Check the visitor's browser and version number
<HTML>
<Body>
<SCRIPT type = "text/JavaScript">
VaR browser = navigator. appname
VaR B _version = navigator. appversion
VaR version = parsefloat (B _version)
Document. Write ("browser name:" + browser)
Document. Write ("<br/> ")
Document. Write ("browser version:" + version)
</SCRIPT>
</Body>
</Html>
(2) more information about the visitor's browser
<HTML>
<Body>
<SCRIPT type = "text/JavaScript">
Document. Write ("<p> Browser :")
Document. Write (navigator. appname + "</P> ")
Document. Write ("<p> browser version :")
Document. Write (navigator. appversion + "</P> ")
Document. Write ("<p> Code :")
Document. Write (navigator. appcodename + "</P> ")
Document. Write ("<p> platform :")
Document. Write (navigator. Platform + "</P> ")
Document. Write ("<p> cookies enabled :")
Document. Write (navigator. cookieenabled + "</P> ")
Document. Write ("<p> browser user proxy header :")
Document. Write (navigator. useragent + "</P> ")
</SCRIPT>
</Body>
</Html>
(3) All details about the visitor's browser
<HTML>
<Body>
<SCRIPT type = "text/JavaScript">
VaR x = navigator;
Document. Write ("codename =" + X. appcodename );
Document. Write ("<br/> ");
Document. Write ("minorversion =" + X. appminorversion );
Document. Write ("<br/> ");
Document. Write ("name =" + X. appname );
Document. Write ("<br/> ");
Document. Write ("version =" + X. appversion );
Document. Write ("<br/> ");
Document. Write ("cookieenabled =" + X. cookieenabled );
Document. Write ("<br/> ");
Document. Write ("cpuclass =" + X. cpuclass );
Document. Write ("<br/> ");
Document. Write ("online =" + X. Online );
Document. Write ("<br/> ");
Document. Write ("platform =" + X. Platform );
Document. Write ("<br/> ");
Document. Write ("UA =" + X. useragent );
Document. Write ("<br/> ");
Document. Write ("browserlanguage =" + X. browserlanguage );
Document. Write ("<br/> ");
Document. Write ("systemlanguage =" + X. systemlanguage );
Document. Write ("<br/> ");
Document. Write ("userlanguage =" + X. userlanguage );
</SCRIPT>
</Body>
</Html>
(4) Remind the user based on the browser
<HTML>
<Head>
<SCRIPT type = "text/JavaScript">
Function detectbrowser ()
{
VaR browser = navigator. appname
VaR B _version = navigator. appversion
VaR version = parsefloat (B _version)
If (Browser = "Netscape" | browser = "Microsoft internetexplorer") & (version> = 4 ))
{Alert ("your browser is already great! ")}
Else
{Alert ("your browser needs to be upgraded! ")}
}
</SCRIPT>
</Head>
<Body onload = "detectbrowser ()">
</Body>
</Html>
3. Five solutions without actual tests (for reference only)
(1) protected void page_load (objectsender, eventargs E)
{
Httpcapabilitiesbase r = (system. Web. configuration. httpcapabilitiesbase) request. browser;
String agent = (request. useragent + ""). tolower (). Trim ();
If (R. browser = "Mozilla ")
Response. Write ("recognizable: Mozilla ");
Else
Response. Write ("Unrecognized: Mozilla ");
If (R. ismobiledevice | r. browser = "unknown" | r. browser = "Mozilla ")
{
Response. Write ("Mobile Phone" + "\ r \ n" + R. browser + "\ r \ n" + R. type );
}
Else
{
Response. Write ("computer" + "\ r \ n" + R. browser + "\ r \ n" + R. type );
}
}
(2)
Protected void page_load (Object sender, eventargs E)
{
If (httpcontext. Current. Request. headers ["User-Agent"]! = NULL & httpcontext. Current. Request. headers ["User-Agent"]. tolower (). tostring (). indexof ("Mozilla ")! =-1)
{
// PC
}
Else
{
// Mobile phone
}
}
(3)
PublicstaticboolBool result = false;
String clienttype = string. Concat (httpcontext. Current. Request. useragent );
If (clienttype. tolower (). Contains ("Mozilla") |
Clienttype. tolower (). Contains ("Opera "))
{
Result = true;
}
Return result;
}
(4)
Using system. Text. regularexpressions; // introduce the regular namespace in the header
// To improve accuracy and prevent WAP-supported browsers such as opera from being added to the operating system for verification. Openwave | later: PC OS
String ospat = "Mozilla | mshortate | winwap | openwave | Windows NT | Windows 3.1 | 95 | Blackcomb | 98 | Me | X Window | Longhorn | Ubuntu | AIX | Linux | amigaos | BEOs | HP-UX | OpenBSD | FreeBSD | NetBSD | OS/2 | osf1 | sun ";
String uagent = request. servervariables ["http_user_agent"];
RegEx Reg = new RegEx (ospat );
If (Reg. ismatch (uagent ))
{
Response. Write ("computer access ");
}
Else
{
Response. Write ("mobile access ");
}
Response. Write ("<br/>" + uagent );
(5)
Httpcapabilitiesbase r = (system. Web. configuration. httpcapabilitiesbase) request. browser;
String browser = R. browser. tostring (). Trim (). tolower ();
If (browser. Contains ("Firefox") | browser. Contains ("ie "))
{
// Response. Write ("computer" + "-- the browser is --" + browser); -- do nothing, continue
}
Else
{
// Response. Write ("Mobile Phone" + "-- browser is --" + browser );
// Jump to the mobile phone page
Response. Redirect ("http://www.jsdeai.com/index.html ");
}
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