using System;using System.Drawing;using System.Collections;using System.ComponentModel;using System.Windows.Forms;using System.Data;using System.Runtime.InteropServices;namespace changesystime{ /// <summary> /// Form1 的摘要說明。 /// </summary> public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.GroupBox groupBox1; private System.Windows.Forms.TextBox textBox1; private System.Windows.Forms.GroupBox groupBox2; private System.Windows.Forms.Button button1; private System.Windows.Forms.Button button2; private System.Timers.Timer timer1; private System.Windows.Forms.DateTimePicker setDate; private System.Windows.Forms.DateTimePicker setTime; private System.ComponentModel.IContainer components; [StructLayout(LayoutKind.Sequential)] public struct SystemTime {  public ushort wYear;  public ushort wMonth;  public ushort wDayOfWeek;  public ushort wDay;  public ushort wHour;  public ushort wMinute;  public ushort wSecond;  public ushort wMiliseconds; }  // 用于設(shè)置系統(tǒng)時間 [DllImport("Kernel32.dll")] public static extern bool SetLocalTime( ref SystemTime sysTime ); // 用于獲得系統(tǒng)時間 [DllImport("Kernel32.dll")] public static extern void GetLocalTime(ref SystemTime sysTime); public Form1() {  //  // Windows 窗體設(shè)計器支持所必需的  //  InitializeComponent();  //  // TODO: 在 InitializeComponent 調(diào)用后添加任何構(gòu)造函數(shù)代碼  // } /// <summary> /// 清理所有正在使用的資源。 /// </summary> protected override void Dispose( bool disposing ) {  if( disposing )  {  if (components != null)   {   components.Dispose();  }  }  base.Dispose( disposing ); } #region Windows 窗體設(shè)計器生成的代碼 /// <summary> /// 設(shè)計器支持所需的方法 - 不要使用代碼編輯器修改 /// 此方法的內(nèi)容。 /// </summary> private void InitializeComponent() {  this.groupBox1 = new System.Windows.Forms.GroupBox();  this.textBox1 = new System.Windows.Forms.TextBox();  this.groupBox2 = new System.Windows.Forms.GroupBox();  this.setTime = new System.Windows.Forms.DateTimePicker();  this.setDate = new System.Windows.Forms.DateTimePicker();  this.button1 = new System.Windows.Forms.Button();  this.button2 = new System.Windows.Forms.Button();  this.timer1 = new System.Timers.Timer();  this.groupBox1.SuspendLayout();  this.groupBox2.SuspendLayout();  ((System.ComponentModel.ISupportInitialize)(this.timer1)).BeginInit();  this.SuspendLayout();  //   // groupBox1  //   this.groupBox1.Controls.Add(this.textBox1);  this.groupBox1.Location = new System.Drawing.Point(32, 24);  this.groupBox1.Name = "groupBox1";  this.groupBox1.Size = new System.Drawing.Size(216, 64);  this.groupBox1.TabIndex = 0;  this.groupBox1.TabStop = false;  this.groupBox1.Text = "系統(tǒng)當(dāng)前時間";  //   // textBox1  //   this.textBox1.Location = new System.Drawing.Point(16, 24);  this.textBox1.Name = "textBox1";  this.textBox1.ReadOnly = true;  this.textBox1.Size = new System.Drawing.Size(184, 21);  this.textBox1.TabIndex = 1;  this.textBox1.Text = "";  //   // groupBox2  //   this.groupBox2.Controls.Add(this.setTime);  this.groupBox2.Controls.Add(this.setDate);  this.groupBox2.Location = new System.Drawing.Point(32, 112);  this.groupBox2.Name = "groupBox2";  this.groupBox2.Size = new System.Drawing.Size(216, 64);  this.groupBox2.TabIndex = 1;  this.groupBox2.TabStop = false;  this.groupBox2.Text = "時間設(shè)置為";  //   // setTime  //   this.setTime.Format = System.Windows.Forms.DateTimePickerFormat.Time;  this.setTime.Location = new System.Drawing.Point(128, 24);  this.setTime.Name = "setTime";  this.setTime.ShowUpDown = true;  this.setTime.Size = new System.Drawing.Size(72, 21);  this.setTime.TabIndex = 1;  this.setTime.TabStop = false;  //   // setDate  //   this.setDate.Format = System.Windows.Forms.DateTimePickerFormat.Short;  this.setDate.Location = new System.Drawing.Point(8, 24);  this.setDate.Name = "setDate";  this.setDate.Size = new System.Drawing.Size(104, 21);  this.setDate.TabIndex = 0;  //   // button1  //   this.button1.Location = new System.Drawing.Point(40, 200);  this.button1.Name = "button1";  this.button1.Size = new System.Drawing.Size(64, 32);  this.button1.TabIndex = 2;  this.button1.Text = "設(shè)置";  this.button1.Click += new System.EventHandler(this.button1_Click);  //   // button2  //   this.button2.Location = new System.Drawing.Point(168, 200);  this.button2.Name = "button2";  this.button2.Size = new System.Drawing.Size(64, 32);  this.button2.TabIndex = 3;  this.button2.Text = "退出";  this.button2.Click += new System.EventHandler(this.button2_Click);  //   // timer1  //   this.timer1.Enabled = true;  this.timer1.SynchronizingObject = this;  this.timer1.Elapsed += new System.Timers.ElapsedEventHandler(this.timer1_Elapsed);  //   // Form1  //   this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);  this.ClientSize = new System.Drawing.Size(280, 261);  this.Controls.Add(this.button2);  this.Controls.Add(this.button1);  this.Controls.Add(this.groupBox2);  this.Controls.Add(this.groupBox1);  this.Name = "Form1";  this.Text = "獲取和設(shè)置系統(tǒng)時間";  this.groupBox1.ResumeLayout(false);  this.groupBox2.ResumeLayout(false);  ((System.ComponentModel.ISupportInitialize)(this.timer1)).EndInit();  this.ResumeLayout(false); } #endregion /// <summary> /// 應(yīng)用程序的主入口點。 /// </summary> [STAThread] static void Main()  {  Application.Run(new Form1()); } private void button2_Click(object sender, System.EventArgs e) {  this.Close(); // 關(guān)閉當(dāng)前窗體 } private void timer1_Elapsed(object sender, System.Timers.ElapsedEventArgs e) {  // 清除textBox1上的字符串  textBox1.Clear();  // 創(chuàng)建SystemTime結(jié)構(gòu)體，用于接收系統(tǒng)當(dāng)前時間  SystemTime systemTime = new SystemTime();  GetLocalTime(ref systemTime); // 獲得系統(tǒng)的時間并存在SystemTime結(jié)構(gòu)體中  // 將系統(tǒng)的時間從 SystemTime 結(jié)構(gòu)體中中取出，并顯示在textBox1上  textBox1.Text += systemTime.wYear.ToString() +"-";  textBox1.Text += systemTime.wMonth.ToString() + "-";  textBox1.Text += systemTime.wDay.ToString() + " ";  textBox1.Text += systemTime.wHour.ToString() + ":";  textBox1.Text += systemTime.wMinute.ToString() + ":";  textBox1.Text += systemTime.wSecond.ToString(); // textBox1.Refresh();  } private void button1_Click(object sender, System.EventArgs e) {  // 創(chuàng)建SystemTime結(jié)構(gòu)體，用于接收用戶設(shè)置的時間  SystemTime systemTime = new SystemTime();  // 從setDate,setTime控件中獲取年，月，日，小時，分鐘，秒信息，存入SystemTime結(jié)構(gòu)體中      systemTime.wYear = (ushort)setDate.Value.Year;  systemTime.wMonth = (ushort)setDate.Value.Month;  systemTime.wDay = (ushort)setDate.Value.Day;  systemTime.wHour = (ushort)setTime.Value.Hour;  systemTime.wMinute = (ushort)setTime.Value.Minute;  systemTime.wSecond = (ushort)setTime.Value.Second;  // 將系統(tǒng)的時間設(shè)置為用戶指定的時間  SetLocalTime(ref systemTime); } }}