如何使用 C# 以编程方式更改本地系统的日期和时间?

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解决方案

这里就是我找到了答案。

我在这里转贴它来提高清晰度。

定义该结构:

[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;
}

下面extern方法添加到你的类:

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

然后,像这样的结构的实例调用方法:

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.

其他提示

您可以使用一个DOS命令拨打电话,但该功能在Windows中调用DLL是一个更好的方式来做到这一点。

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);
}  

这里已经有很多很棒的观点和方法,但这里有一些目前被遗漏的规范,我觉得它们可能会绊倒并让一些人感到困惑。

  1. Windows Vista、7、8 操作系统 这会 要求 UAC 提示以获得成功执行所需的管理权限 SetSystemTime 功能。原因是调用过程需要 SE_SYSTEMTIME_NAME 特权。
  2. SetSystemTime 函数期待一个 SYSTEMTIME 协调世界时的结构 (世界标准时间). 。否则它将无法按预期工作。

取决于您在哪里/如何获得您的 DateTime 值,最好谨慎行事并使用 ToUniversalTime() 在设置相应的值之前 SYSTEMTIME 结构。

代码示例:

DateTime tempDateTime = GetDateTimeFromSomeService();
DateTime dateTime = tempDateTime.ToUniversalTime();

SYSTEMTIME st = new SYSTEMTIME();
// All of these must be short
st.wYear = (short)dateTime.Year;
st.wMonth = (short)dateTime.Month;
st.wDay = (short)dateTime.Day;
st.wHour = (short)dateTime.Hour;
st.wMinute = (short)dateTime.Minute;
st.wSecond = (short)dateTime.Second;

// invoke the SetSystemTime method now
SetSystemTime(ref st); 
  1. PInvoke 调用 Win32 API SetSystemTime,(例子)
  2. 具有 WMI 类 Win32_OperatingSystem 的 System.Management 类并在该类上调用 SetDateTime。

两者都要求调用者已被授予 SeSystemTimePrivilege 并且启用此权限。

使用该功能来改变系统的时间(在测试窗8)

 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: 拨打形式的负载方式 的setDate( “92年5月6日”); 时刻设定( “2:4:5 AM”);

由于我在评论中提及它,这里有一个C ++ / CLI包装:

#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);
        }
    };
}

在C#客户端代码现在很简单:

JDanielSmith.Utilities.SetSystemTime(DateTime.Now);

小心! 如果从结构删除未使用的属性,它设置的时间错误的。我已经下跌1的一天,因为这一点。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;

        };

如果您运行SetSystemTime(),它按预期工作。 为测试I中设置的时间,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);

<强>的时间组:2019年10月15日10:20,其确定

但是我删除其中不使用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);

生成相同的代码但设定为时间:2019年10月10日20时30分

请小心顺序和SYSTEMTIME结构的所有字段。 优素福

  

proc.Arguments = “/ C日期:” + dateInYourSystemFormat;

这是功函数:

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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