使用c#设置系统时间（不同于以往的文章，是经过测试的）
 

http://blog.csdn.net/jingang123gz/a...14/2649755.aspx
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();
}


}
}

回复: 使用c#设置系统时间（不同于以往的文章，是经过测试的）
 

NET并没有提供可以修改系统时间的名字空间(namespace),您可以通过Win32 API的SetSystemTime API函数来设置系统时间:

using System;
using System.Runtime.InteropServices;

[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);
}

public class TestPInvoke
{
public static void Main()
{
SystemTime sysTime = new SystemTime();

sysTime.wYear = 2002;
sysTime.wMonth=1;
sysTime.wDay=1;
sysTime.wDayOfWeek=1;
sysTime.wHour=1;
sysTime.wMinute=1;
sysTime.wSecond=1;
sysTime.wMiliseconds=1;

Win32.SetSystemTime(ref sysTime);
}
}

回复: 使用c#设置系统时间（不同于以往的文章，是经过测试的）
 

To credream(阿蒙):

你在那个地方?应该是9点才是.不是北京时间吗?

忘记和你说了,这个SetSystemTime使用的是UTC时间(0时区).你要根据这个原则自己修改时间.


The SetSystemTime function sets the current system time and date. The system time is expressed in Coordinated Universal Time (UTC).


参考MSDN:
http://msdn.microsoft.com/library/d...tsystemtime.asp

回复: 使用c#设置系统时间（不同于以往的文章，是经过测试的）
 

种方法是调用Win32 API SetSystemTime.

using System.Runtime .InteropServices ;
[ StructLayout( LayoutKind.Sequential )]
public class SystemTime
{
public ushort year;
public ushort month;
public ushort dayOfWeek;
public ushort day;
public ushort hour;
public ushort minute;
public ushort second;
public ushort milliseconds;

}

class MainClass
{
[ DllImport( "Kernel32.dll" )]
public static extern void GetSystemTime( [In,Out] SystemTime st );

[ DllImport( "Kernel32.dll" )]
public static extern bool SetSystemTime( [In,Out] SystemTime st );
public static void Main(string[] args)
{

SystemTime st=new SystemTime ();

GetSystemTime(st);

st.year +=1;
bool result=SetSystemTime(st);
}
}

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