使用C#设置系统时间（不同于以往的文章，是经过测试的）

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
namespace WindowsApplication1
{
[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;
}
public class Win32
{
[DllImport("Kernel32.dll")]
public static extern bool SetSystemTime( ref SystemTime sysTime );
[DllImport("Kernel32.dll")]
public static extern void GetSystemTime(ref SystemTime sysTime);
}
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.TextBox textBox2;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.textBox2 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(188, 174);
this.button1.Name = "button1";
this.button1.TabIndex = 0;
this.button1.Text = "button1";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(56, 12);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(510, 21);
this.textBox1.TabIndex = 1;
this.textBox1.Text = "textBox1";
//
// textBox2
//
this.textBox2.Location = new System.Drawing.Point(58, 50);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(506, 21);
this.textBox2.TabIndex = 2;
this.textBox2.Text = "textBox2";
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(602, 273);
this.Controls.Add(this.textBox2);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void button1_Click(object sender, System.EventArgs e)
{
textBox1.Text = DateTime.Now.ToLongDateString() + DateTime.Now.ToLongTimeString();
SystemTime sysTime = new SystemTime();
sysTime.wYear = Convert.ToUInt16(DateTime.Now.Year);
sysTime.wMonth = Convert.ToUInt16(DateTime.Now.Month);
//处置北京时间
int nBeijingHour = DateTime.Now.Hour - 8;
if (nBeijingHour <= 0)
{
nBeijingHour += 24;
sysTime.wDay= Convert.ToUInt16(DateTime.Now.Day - 1);
sysTime.wDayOfWeek = Convert.ToUInt16(DateTime.Now.DayOfWeek - 1);
}
else
{
sysTime.wDay= Convert.ToUInt16(DateTime.Now.Day);
sysTime.wDayOfWeek = Convert.ToUInt16(DateTime.Now.DayOfWeek);
}
sysTime.wHour = Convert.ToUInt16(nBeijingHour);
sysTime.wMinute = Convert.ToUInt16(DateTime.Now.Minute);
sysTime.wSecond = Convert.ToUInt16(DateTime.Now.Second);
sysTime.wMiliseconds = Convert.ToUInt16(DateTime.Now.Millisecond);

Win32.SetSystemTime(ref sysTime);
textBox2.Text = DateTime.Now.ToLongDateString() + DateTime.Now.ToLongTimeString();
}
}
}