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至顶网软件频道基础软件C#中调用API

C#中调用API

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API(Application Programming Interface),我想大家不会陌生,它是我们Windows编程的常客,虽然基于.Net平台的C#有了强大的类库......

作者:飞刀 来源:aspcn 2007年11月14日

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调用API全部代码

  //Created By Ajit Mungale

  //程序补充 飞刀

  namespace UsingAPI

  {

  using System;

  using System.Drawing;

  using System.Collections;

  using System.ComponentModel;

  using System.WinForms;

  using System.Data;

  using System.Runtime.InteropServices;

  //Struct 收集系统信息

  [StructLayout(LayoutKind.Sequential)]

  public struct SYSTEM_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;

    }

  //struct 收集内存情况

  [StructLayout(LayoutKind.Sequential)]

  public struct MEMORYSTATUS

  {

       public uint dwLength;

       public uint dwMemoryLoad;

       public uint dwTotalPhys;

       public uint dwAvailPhys;

       public uint dwTotalPageFile;

       public uint dwAvailPageFile;

       public uint dwTotalVirtual;

       public uint dwAvailVirtual;

  }

  public class Form1 : System.WinForms.Form

  {

    private System.ComponentModel.Container components;

    private System.WinForms.MenuItem menuAbout;

    private System.WinForms.MainMenu mainMenu1;

    private System.WinForms.ListBox listBox1;

    private System.WinForms.Button button1;

  //获取系统信息

    [DllImport("kernel32")]

    static extern void GetSystemInfo(ref SYSTEM_INFO pSI);

    //获取内存信息

    [DllImport("kernel32")]

    static extern void GlobalMemoryStatus(ref MEMORYSTATUS buf);

    //处理器类型

    public const int PROCESSOR_INTEL_386 = 386;

    public const int PROCESSOR_INTEL_486 = 486;

    public const int PROCESSOR_INTEL_PENTIUM = 586;

    public const int PROCESSOR_MIPS_R4000 = 4000;

    public const int PROCESSOR_ALPHA_21064 = 21064;

    public Form1()

    {

      InitializeComponent();

    }

    public override void Dispose()

    {

      base.Dispose();

      components.Dispose();

    }

    private void InitializeComponent()

     {

       this.components = new System.ComponentModel.Container ();

       this.mainMenu1 = new System.WinForms.MainMenu ();

       this.button1 = new System.WinForms.Button ();

       this.listBox1 = new System.WinForms.ListBox ();

       this.menuAbout = new System.WinForms.MenuItem ();

       mainMenu1.MenuItems.All = new System.WinForms.MenuItem[1] {this.menuAbout};

       button1.Location = new System.Drawing.Point (148, 168);

       button1.Size = new System.Drawing.Size (112, 32);

       button1.TabIndex = 0;

       button1.Text = "&Get Info";

       button1.Click += new System.EventHandler (this.button1_Click);

       listBox1.Location = new System.Drawing.Point (20, 8);

       listBox1.Size = new System.Drawing.Size (368, 147);

       listBox1.TabIndex = 1;

       menuAbout.Text = "&About";

       menuAbout.Index = 0;

       menuAbout.Click += new System.EventHandler (this.menuAbout_Click);

       this.Text = "System Information - Using API";

       this.MaximizeBox = false;

       this.AutoScaleBaseSize = new System.Drawing.Size (5, 13);

       this.MinimizeBox = false;

       this.Menu = this.mainMenu1;

       this.ClientSize = new System.Drawing.Size (408, 213);

       this.Controls.Add (this.listBox1);

       this.Controls.Add (this.button1);

    }

    protected void menuAbout_Click (object sender, System.EventArgs e)

    {

       Form abt=new about() ;

       abt.ShowDialog();

    }

    protected void button1_Click (object sender, System.EventArgs e)

    {

       try

       {

          SYSTEM_INFO pSI = new SYSTEM_INFO();

          GetSystemInfo(ref pSI);

          string CPUType;

          switch (pSI.dwProcessorType)

          {

            case PROCESSOR_INTEL_386 :

               CPUType= "Intel 386";

               break;

            case PROCESSOR_INTEL_486 :

               CPUType = "Intel 486" ;

              break;

            case PROCESSOR_INTEL_PENTIUM :

              CPUType = "Intel Pentium";

              break;

            case PROCESSOR_MIPS_R4000 :

              CPUType = "MIPS R4000";

              break;

            case PROCESSOR_ALPHA_21064 :

              CPUType = "DEC Alpha 21064";

              break;

            default :

              CPUType = "(unknown)";

         }

         listBox1.InsertItem (0,"Active Processor Mask :"+pSI.dwActiveProcessorMask.ToString());

         listBox1.InsertItem (1,"Allocation Granularity :"+pSI.dwAllocationGranularity.ToString());

         listBox1.InsertItem (2,"Number Of Processors :"+pSI.dwNumberOfProcessors.ToString());

         listBox1.InsertItem (3,"OEM ID :"+pSI.dwOemId.ToString());

         listBox1.InsertItem (4,"Page Size:"+pSI.dwPageSize.ToString());

         listBox1.InsertItem (5,"Processor Level Value:"+pSI.dwProcessorLevel.ToString());

         listBox1.InsertItem (6,"Processor Revision:"+ pSI.dwProcessorRevision.ToString());

         listBox1.InsertItem (7,"CPU type:"+CPUType);

         listBox1.InsertItem (8,"Maximum Application Address: "+pSI.lpMaximumApplicationAddress.ToString());

         listBox1.InsertItem (9,"Minimum Application Address:" +pSI.lpMinimumApplicationAddress.ToString());

         /************** 从 GlobalMemoryStatus 获取返回值****************/

         MEMORYSTATUS memSt = new MEMORYSTATUS ();
         GlobalMemoryStatus (ref memSt);

         listBox1.InsertItem(10,"Available Page File :"+ (memSt.dwAvailPageFile/1024).ToString ());

         listBox1.InsertItem(11,"Available Physical Memory : " + (memSt.dwAvailPhys/1024).ToString());

         listBox1.InsertItem(12,"Available Virtual Memory:" + (memSt.dwAvailVirtual/1024).ToString ());

         listBox1.InsertItem(13,"Size of structur :" + memSt.dwLength.ToString());

         listBox1.InsertItem(14,"Memory In Use :"+ memSt.dwMemoryLoad.ToString());

         listBox1.InsertItem(15,"Total Page Size :"+ (memSt.dwTotalPageFile/1024).ToString ());

         listBox1.InsertItem(16,"Total Physical Memory :" + (memSt.dwTotalPhys/1024).ToString());

         listBox1.InsertItem(17,"Total Virtual Memory :" + (memSt.dwTotalVirtual/1024).ToString ());

       }

       catch(Exception er)

       {

         MessageBox.Show (er.Message);

       }

    }

    public static void Main(string[] args)

    {

      try

       {

          Application.Run(new Form1());

       }

       catch(Exception er)

       {

          MessageBox.Show (er.Message );

       }

   }

  }

}

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