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运用API函数获取系统信息2007-07-24 13:07:00

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1.htm页面
<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>
                <col width="50%">
                <col width="50%">
            </colgroup>
            <table width="100%">
                <tr>
                    <td bgcolor="#99ccff">Window及系统路径:</td>
                    <td bgcolor="#99ccff">系统日期信息:</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="#99ccff">内存信息:</td>
                    <td bgcolor="#99ccff">CUP信息:</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">AvailVirtualLabel</asp:Label></td>
                    <td></td>
                </tr>
            </table>
            <asp:Button id="Button1" style="Z-INDEX: 101; LEFT: 752px; POSITION: absolute; TOP: 304px" runat="server"
                Text="获取"></asp:Button>
        </form>
    </body>
</HTML>

2.cs代码
public class SystemInfo : System.Web.UI.Page
    {
        //要添加如下引用
        //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;

        //在调用API之前,你必须先导入System.Runtime.InteropServices这个名称空间。
        //其中,"DllImport"属性用来从不可控代码中调用一个方法,它指定了DLL的位置,该DLL中包含调用的外部方法;
        //"kernel32"设定了类库名;"public"指明函数的访问类型为公有的;
        //"static"修饰符声明一个静态元素,而该元素属于类型本身而不是指定的对象;
        //"extern"表示该方法将在工程外部执行,同时使用DllImport导入的方法必须使用"extern"修饰符
        [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);

        //定义CPU的信息结构
        [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;
        }
        //定义内存的信息结构
        [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;
        }
        //定义系统时间的信息结构
        [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#region Web Form Designer generated code
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN: This call is required by the ASP.NET Web Form Designer.
            //
            InitializeComponent();
            base.OnInit(e);
        }
       
        /**//// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {   
            this.Button1.Click += new System.EventHandler(this.Button1_Click);
            this.Load += new System.EventHandler(this.Page_Load);

        }
        #endregion

        private void Button1_Click(object sender, System.EventArgs e)
        {
            //调用GetWindowsDirectory和GetSystemDirectory函数分别取得Windows路径和系统路径
            const int nChars = 128;
            StringBuilder Buff = new StringBuilder(nChars);
            GetWindowsDirectory(Buff,nChars);
            WindowsDirectory.Text = "Windows路径:"+Buff.ToString();
            GetSystemDirectory(Buff,nChars);
            SystemDirectory.Text = "系统路径:"+Buff.ToString();
            //调用GetSystemInfo函数获取CPU的相关信息
            CPU_INFO CpuInfo;
            CpuInfo = new CPU_INFO();
            GetSystemInfo(ref CpuInfo);
            NumberOfProcessors.Text = "本计算机中有"+CpuInfo.dwNumberOfProcessors.ToString()+"个CPU";
            ProcessorType.Text = "CPU的类型为"+CpuInfo.dwProcessorType.ToString();
            ProcessorLevel.Text = "CPU等级为"+CpuInfo.dwProcessorLevel.ToString();
            OemId.Text = "CPU的OEM ID为"+CpuInfo.dwOemId.ToString();
            PageSize.Text = "CPU中的页面大小为"+CpuInfo.dwPageSize.ToString();
            //调用GlobalMemoryStatus函数获取内存的相关信息
            MEMORY_INFO MemInfo;
            MemInfo = new MEMORY_INFO();
            GlobalMemoryStatus(ref MemInfo);
            MemoryLoad.Text = MemInfo.dwMemoryLoad.ToString()+"%的内存正在使用";
            TotalPhys.Text = "物理内存共有"+MemInfo.dwTotalPhys.ToString()+"字节";
            AvailPhys.Text = "可使用的物理内存有"+MemInfo.dwAvailPhys.ToString()+"字节";
            TotalPageFile.Text = "交换文件总大小为"+MemInfo.dwTotalPageFile.ToString()+"字节";
            AvailPageFile.Text = "尚可交换文件大小为"+MemInfo.dwAvailPageFile.ToString()+"字节";
            TotalVirtual.Text = "总虚拟内存有"+MemInfo.dwTotalVirtual.ToString()+"字节";
            AvailVirtual.Text = "未用虚拟内存有"+MemInfo.dwAvailVirtual.ToString()+"字节";
            //调用GetSystemTime函数获取系统时间信息
            SYSTEMTIME_INFO StInfo;
            StInfo = new SYSTEMTIME_INFO();
            GetSystemTime(ref StInfo);
            Date.Text = StInfo.wYear.ToString()+"年"+StInfo.wMonth.ToString()+"月"+StInfo.wDay.ToString()+"日";
            Time.Text = (StInfo.wHour+8).ToString()+"点"+StInfo.wMinute.ToString()+"分"+StInfo.wSecond.ToString()+"秒";
        }
    }

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