以编程方式更改系统日期

时间：2009-03-16 15:12:29

标签： c# datetime date time system

如何更改本地系统的日期和时间？用C＃编程的时间？

9 个答案:

答案 0 :(得分：79)

Here is where I found the answer.

我已在此处重新发布，以提高清晰度。

定义此结构：

[StructLayout(LayoutKind.Sequential)]
public struct SYSTEMTIME
{
    public short wYear;
    public short wMonth;
    public short wDayOfWeek;
    public short wDay;
    public short wHour;
    public short wMinute;
    public short wSecond;
    public short wMilliseconds;
}

将以下extern方法添加到您的课程中：

[DllImport("kernel32.dll", SetLastError = true)]
public static extern bool SetSystemTime(ref SYSTEMTIME st);

然后使用结构实例调用该方法，如下所示：

SYSTEMTIME st = new SYSTEMTIME();
st.wYear = 2009; // must be short
st.wMonth = 1;
st.wDay = 1;
st.wHour = 0;
st.wMinute = 0;
st.wSecond = 0;

SetSystemTime(ref st); // invoke this method.

答案 1 :(得分：15)

您可以使用对DOS命令的调用，但是在Windows dll中调用该函数是一种更好的方法。

public struct SystemTime
{
    public ushort Year;
    public ushort Month;
    public ushort DayOfWeek;
    public ushort Day;
    public ushort Hour;
    public ushort Minute;
    public ushort Second;
    public ushort Millisecond;
};

[DllImport("kernel32.dll", EntryPoint = "GetSystemTime", SetLastError = true)]
public extern static void Win32GetSystemTime(ref SystemTime sysTime);

[DllImport("kernel32.dll", EntryPoint = "SetSystemTime", SetLastError = true)]
public extern static bool Win32SetSystemTime(ref SystemTime sysTime);

private void button1_Click(object sender, EventArgs e)
{
    // Set system date and time
    SystemTime updatedTime = new SystemTime();
    updatedTime.Year = (ushort)2009;
    updatedTime.Month = (ushort)3;
    updatedTime.Day = (ushort)16;
    updatedTime.Hour = (ushort)10;
    updatedTime.Minute = (ushort)0;
    updatedTime.Second = (ushort)0;
    // Call the unmanaged function that sets the new date and time instantly
    Win32SetSystemTime(ref updatedTime);
}

答案 2 :(得分：11)

许多伟大的观点和方法已经在这里，但是这里有一些规范目前被遗漏，我觉得可能会绊倒并迷惑一些人。

  1. 在 Windows Vista，7,8 OS 上，这将要求 UAC提示，以获取成功执行SetSystemTime功能所需的管理权限。原因是调用流程需要 SE_SYSTEMTIME_NAME 权限。
  2. SetSystemTime函数期望协调世界时的<{1}}结构（UTC）。否则它将无法正常工作。

    3. 根据您获取SYSTEMTIME值的位置/方式，最好安全地使用它并在DateTime结构中设置相应值之前使用ToUniversalTime()。

    代码示例：

    SYSTEMTIME

答案 3 :(得分：7)

  1. PInvoke调用Win32 API SetSystemTime，（ example ）
  2. 具有WMI类Win32_OperatingSystem的System.Management类，并在该类上调用SetDateTime。

    3. 两者都要求已向呼叫者授予SeSystemTimePrivilege并且已启用此权限。

答案 4 :(得分：6)

使用此功能更改系统时间（在窗口8中测试） 

 void setDate(string dateInYourSystemFormat)
    {
        var proc = new System.Diagnostics.ProcessStartInfo();
        proc.UseShellExecute = true;
        proc.WorkingDirectory = @"C:\Windows\System32";
        proc.CreateNoWindow = true;
        proc.FileName = @"C:\Windows\System32\cmd.exe";
        proc.Verb = "runas";
        proc.Arguments = "/C date " + dateInYourSystemFormat;
        try
        {
            System.Diagnostics.Process.Start(proc);
        }
        catch
        {
            MessageBox.Show("Error to change time of your system");
            Application.ExitThread();
        }
    }
void setTime(string timeInYourSystemFormat)
    {
        var proc = new System.Diagnostics.ProcessStartInfo();
        proc.UseShellExecute = true;
        proc.WorkingDirectory = @"C:\Windows\System32";
        proc.CreateNoWindow = true;
        proc.FileName = @"C:\Windows\System32\cmd.exe";
        proc.Verb = "runas";
        proc.Arguments = "/C time " + timeInYourSystemFormat;
        try
        {
            System.Diagnostics.Process.Start(proc);
        }
        catch
        {
            MessageBox.Show("Error to change time of your system");
            Application.ExitThread();
        }
    }

示例： 调用表单的加载方法 的setDate（ “92年5月6日”）; setTime（“2：4：5 AM”）;

答案 5 :(得分：3)

自从我在评论中提到它以来，这里是一个C ++ / CLI包装器：

#include <windows.h>
namespace JDanielSmith
{
    public ref class Utilities abstract sealed /* abstract sealed = static */
    {
    public:
        CA_SUPPRESS_MESSAGE("Microsoft.Security", "CA2122:DoNotIndirectlyExposeMethodsWithLinkDemands")
        static void SetSystemTime(System::DateTime dateTime) {
            LARGE_INTEGER largeInteger;
            largeInteger.QuadPart = dateTime.ToFileTimeUtc(); // "If your compiler has built-in support for 64-bit integers, use the QuadPart member to store the 64-bit integer."


            FILETIME fileTime; // "...copy the LowPart and HighPart members [of LARGE_INTEGER] into the FILETIME structure."
            fileTime.dwHighDateTime = largeInteger.HighPart;
            fileTime.dwLowDateTime = largeInteger.LowPart;


            SYSTEMTIME systemTime;
            if (FileTimeToSystemTime(&fileTime, &systemTime))
            {
                if (::SetSystemTime(&systemTime))
                    return;
            }


            HRESULT hr = HRESULT_FROM_WIN32(GetLastError());
            throw System::Runtime::InteropServices::Marshal::GetExceptionForHR(hr);
        }
    };
}

C＃客户端代码现在非常简单：

JDanielSmith.Utilities.SetSystemTime(DateTime.Now);

答案 6 :(得分：1)

为正在寻找的其他人提供复制/粘贴课程

using System;
using System.ComponentModel;
using System.Runtime.InteropServices;

public static class SystemDateTime
{
    [DllImport("kernel32.dll", EntryPoint = "SetSystemTime", SetLastError = true)]
    private static extern bool Win32SetSystemTime(ref SystemTime sysTime);

    [StructLayout(LayoutKind.Sequential)]
    public struct SystemTime
    {
        public ushort Year;
        public ushort Month;
        public ushort DayOfWeek;
        public ushort Day;
        public ushort Hour;
        public ushort Minute;
        public ushort Second;
        public ushort Millisecond;
    };

    public static void SetSystemDateTime(int year, int month, int day, int hour,
        int minute, int second, int millisecond)
    {
        SystemTime updatedTime = new SystemTime
        {
            Year = (ushort) year,
            Month = (ushort) month,
            Day = (ushort) day,
            Hour = (ushort) hour,
            Minute = (ushort) minute,
            Second = (ushort) second,
            Millisecond = (ushort) millisecond
        };

        // If this returns false, then the problem is most likely that you don't have the 
        // admin privileges required to set the system clock
        if (!Win32SetSystemTime(ref updatedTime))
        {
            throw new Win32Exception(Marshal.GetLastWin32Error());
        }
    }

    public static void SetSystemDateTime(DateTime dateTime)
    {
        SetSystemDateTime(dateTime.Year, dateTime.Month, dateTime.Day, dateTime.Hour, dateTime.Minute,
            dateTime.Second, dateTime.Millisecond);
    }
}

答案 7 :(得分：0)

要小心！。 如果从结构中删除未使用的属性，则会设置错误的时间。因此，我失去了1天。我认为结构的顺序很重要。

这是正确的结构：

public struct SystemTime
        {
            public ushort Year;
            public ushort Month;
            public ushort DayOfWeek;
            public ushort Day;
            public ushort Hour;
            public ushort Minute;
            public ushort Second;
            public ushort Millisecond;

        };

如果运行SetSystemTime（），它将按预期运行。 为了进行测试，我将时间设置如下：

SystemTime st = new SystemTime();
st.Year = 2019;
st.Month = 10;
st.Day = 15;
st.Hour = 10;
st.Minute = 20;
st.Second = 30;

SetSystemTime(ref st);

时间设置：2019年10月15日10:20，可以。

但是我删除了不使用的DayOfWeek属性； 

public struct SystemTime
            {
                public ushort Year;
                public ushort Month;
                public ushort Day;
                public ushort Hour;
                public ushort Minute;
                public ushort Second;
                public ushort Millisecond;

            };

SystemTime st = new SystemTime();
    st.Year = 2019;
    st.Month = 10;
    st.Day = 15;
    st.Hour = 10;
    st.Minute = 20;
    st.Second = 30;

    SetSystemTime(ref st);

运行相同的代码，但时间设置为：10.10.2019 20:30

请注意顺序和SystemTime结构的所有字段。 优素福

答案 8 :(得分：-4)

  

proc.Arguments =＆＃34; / C日期：＆＃34; + dateInYourSystemFormat;

这是工作职能：

void setDate(string dateInYourSystemFormat)
{
    var proc = new System.Diagnostics.ProcessStartInfo();
    proc.UseShellExecute = true;
    proc.WorkingDirectory = @"C:\Windows\System32";
    proc.CreateNoWindow = true;
    proc.FileName = @"C:\Windows\System32\cmd.exe";
    proc.Verb = "runas";
    proc.Arguments = "/C Date:" + dateInYourSystemFormat;
    try
    {
        System.Diagnostics.Process.Start(proc);
    }
    catch
    {
        MessageBox.Show("Error to change time of your system");
        Application.ExitThread();
    }
}
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