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C # Use APIs to view system information

Source: Internet
Author: User
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<HTML>
<Head>
<Title> systeminfo </title>
<Meta name = "generator" content = "Microsoft Visual Studio. NET 7.1">
<Meta name = "code_language" content = "C #">
<Meta name = "vs_defaultclientscript" content = "JavaScript">
<Meta name = "vs_targetschema" content = "http://schemas.microsoft.com/intellisense/ie5">
</Head>
<Body ms_positioning = "gridlayout">
<Form ID = "form1" method = "Post" runat = "server">
<Colgroup>
& Lt; Col width = "50%" & gt;
& Lt; Col width = "50%" & gt;
</Colgroup>
& Lt; table width = "100%" & gt;
<Tr>
<TD bgcolor = "#99 CCFF"> window and System Path: </TD>
<TD bgcolor = "#99 CCFF"> system date information: </TD>
</Tr>
<Tr>
<TD>
<Asp: Label id = "windowsdirectory" runat = "server"> windowsdirectory </ASP: Label> </TD>
<TD>
<Asp: Label id = "date" runat = "server"> date </ASP: Label> </TD>
</Tr>
<Tr>
<TD>
<Asp: Label id = "systemdirectory" runat = "server"> systemdirectorylabel </ASP: Label> </TD>
<TD>
<Asp: Label id = "time" runat = "server"> time </ASP: Label> </TD>
</Tr>
<Tr>
<TD bgcolor = "#99 CCFF"> memory information: </TD>
<TD bgcolor = "#99 CCFF"> cup information: </TD>
</Tr>
<Tr>
<TD>
<Asp: Label id = "memoryload" runat = "server"> memoryload </ASP: Label> </TD>
<TD>
<Asp: Label id = "numberofprocessors" runat = "server"> numberofprocessorslabel </ASP: Label> </TD>
</Tr>
<Tr>
<TD>
<Asp: Label id = "totalphys" runat = "server"> totalphys </ASP: Label> </TD>
<TD>
<Asp: Label id = "processortype" runat = "server"> processortypelabel </ASP: Label> </TD>
</Tr>
<Tr>
<TD>
<Asp: Label id = "availphys" runat = "server"> availphys </ASP: Label> </TD>
<TD>
<Asp: Label id = "processorlevel" runat = "server"> processorlevellabel </ASP: Label> </TD>
</Tr>
<Tr>
<TD>
<Asp: Label id = "totalpagefile" runat = "server"> totalpagefile </ASP: Label> </TD>
<TD>
<Asp: Label id = "oemid" runat = "server"> oemidlabel </ASP: Label> </TD>
</Tr>
<Tr>
<TD>
<Asp: Label id = "availpagefile" runat = "server"> availpagefile </ASP: Label> </TD>
<TD>
<Asp: Label id = "pagesize" runat = "server"> pagesize </ASP: Label> </TD>
</Tr>
<Tr>
<TD>
<Asp: Label id = "totalvirtual" runat = "server"> totalvirtuallabel </ASP: Label> </TD>
<TD> </TD>
</Tr>
<Tr>
<TD>
<Asp: Label id = "availvirtual" runat = "server"> availpolicallabel </ASP: Label> </TD>
<TD> </TD>
</Tr>
</Table>
<Asp: button id = "button1" style = "Z-INDEX: 101; left: 752px; position: absolute; top: 304px" runat = "server"
TEXT = "get"> </ASP: button>
</Form>
</Body>
</Html>

Public class systeminfo: system. Web. UI. Page
{
// Add the following reference
// Using system. runtime. interopservices;
// Using system. text;
Protected system. Web. UI. webcontrols. Label windowsdirectory;
Protected system. Web. UI. webcontrols. Label systemdirectory;
Protected system. Web. UI. webcontrols. Label numberofprocessors;
Protected system. Web. UI. webcontrols. Label processortype;
Protected system. Web. UI. webcontrols. Label processorlevel;
Protected system. Web. UI. webcontrols. Label oemid;
Protected system. Web. UI. webcontrols. Label pagesize;
Protected system. Web. UI. webcontrols. Label memoryload;
Protected system. Web. UI. webcontrols. Label totalphys;
Protected system. Web. UI. webcontrols. Label availphys;
Protected system. Web. UI. webcontrols. Label totalpagefile;
Protected system. Web. UI. webcontrols. Label availpagefile;
Protected system. Web. UI. webcontrols. Label totalvirtual;
Protected system. Web. UI. webcontrols. Label availvirtual;
Protected system. Web. UI. webcontrols. Label date;
Protected system. Web. UI. webcontrols. Label time;
Protected system. Web. UI. webcontrols. Button button1;

// Before calling an API, you must first import the system. runtime. interopservices namespace.
// The "dllimport" attribute is used to call a method from uncontrollable code. It specifies the DLL location and contains the called external method;
// "Kernel32" sets the class library name; "public" indicates that the function access type is public;
// The "static" modifier declares a static element, which belongs to the type rather than the specified object;
// "Extern" indicates that this method will be executed outside the project, and the method imported using dllimport must use the "extern" Modifier
[Dllimport ("Kernel32")]
Public static extern void getwindowsdirectory (stringbuilder WINDIR, int count );
[Dllimport ("Kernel32")]
Public static extern void getsystemdirectory (stringbuilder Sysdir, int count );
[Dllimport ("Kernel32")]
Public static extern void getsysteminfo (ref cpu_info cpuinfo );
[Dllimport ("Kernel32")]
Public static extern void globalmemorystatus (ref memory_info meminfo );
[Dllimport ("Kernel32")]
Public static extern void getsystemtime (ref systemtime_info stinfo );

// Define the CPU Information Structure
[Structlayout (layoutkind. Sequential)]
Public struct cpu_info
{
Public uint dwoemid;
Public uint dwpagesize;
Public uint lpminimumapplicationaddress;
Public uint lpmaximumapplicationaddress;
Public uint dwactiveprocessormask;
Public uint dwnumberofprocessors;
Public uint dwprocessortype;
Public uint dwallocationgranularity;
Public uint dwprocessorlevel;
Public uint dwprocessorrevision;
}
// Define the memory information structure
[Structlayout (layoutkind. Sequential)]
Public struct memory_info
{
Public uint dwlength;
Public uint dwmemoryload;
Public uint dwtotalphys;
Public uint dwavailphys;
Public uint dwtotalpagefile;
Public uint dwavailpagefile;
Public uint dwtotalvirtual;
Public uint dwavailvirtual;
}
// Define the system time information structure
[Structlayout (layoutkind. Sequential)]
Public struct systemtime_info
{
Public ushort wyear;
Public ushort wmonth;
Public ushort wdayofweek;
Public ushort wday;
Public ushort whour;
Public ushort wminute;
Public ushort wsecond;
Public ushort wmilliseconds;
}

Private void page_load (Object sender, system. eventargs E)
{
// Put user code to initialize the page here
}

Web Form Designer generated code

Private void button#click (Object sender, system. eventargs E)
{
// Call the getwindowsdirectory and getsystemdirectory functions to obtain the Windows path and system path respectively.
Const int nchars = 128;
Stringbuilder buff = new stringbuilder (nchars );
Getwindowsdirectory (buff, nchars );
Windows directory. Text = "Windows path:" + buff. tostring ();
Getsystemdirectory (buff, nchars );
Systemdirectory. Text = "System Path:" + buff. tostring ();
// Call the getsysteminfo function to obtain CPU Information
Cpu_info cpuinfo;
Cpuinfo = new cpu_info ();
Getsysteminfo (ref cpuinfo );
Numberofprocessors. Text = "in this computer" + cpuinfo. dwnumberofprocessors. tostring () + "CPU ";
Processortype. Text = "CPU type" + cpuinfo. dwprocessortype. tostring ();
Processorlevel. Text = "CPU level" + cpuinfo. dwprocessorlevel. tostring ();
Oemid. Text = "cpu oem id is" + cpuinfo. dwoemid. tostring ();
Pagesize. Text = "page size in CPU is" + cpuinfo. dwpagesize. tostring ();
// Call the globalmemorystatus function to obtain memory information.
Memory_info meminfo;
Meminfo = new memory_info ();
Globalmemorystatus (ref meminfo );
Memoryload. Text = meminfo. dwmemoryload. tostring () + "% memory in use ";
Totalphys. Text = "total physical memory" + meminfo. dwtotalphys. tostring () + "Byte ";
Availphys. Text = "available physical memory" + meminfo. dwavailphys. tostring () + "Byte ";
Totalpagefile. Text = "the total size of the swap file is" + meminfo. dwtotalpagefile. tostring () + "Byte ";
Availpagefile. Text = "the size of the interchangeable file is" + meminfo. dwavailpagefile. tostring () + "Byte ";
Totalvirtual. Text = "Total virtual memory" + meminfo. dwtotalvirtual. tostring () + "Byte ";
Availvirtual. Text = "unused Virtual Memory" + meminfo. dwavailvirtual. tostring () + "Byte ";
// Call the getsystemtime function to obtain the system time information.
Systemtime_info stinfo;
Stinfo = new systemtime_info ();
Getsystemtime (ref stinfo );
Date. Text = stinfo. wyear. tostring () + "year" + stinfo. wmonth. tostring () + "month" + stinfo. wday. tostring () + "day ";
Time. TEXT = (stinfo. whour + 8 ). tostring () + "point" + stinfo. wminute. tostring () + "Minute" + stinfo. wsecond. tostring () + "seconds ";
}
}

 

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