最近遇到个项目,需要控制软件使用时间,由于电脑不联网可以修改时间,故需要联网使电脑同步网络时间
网上寻找了很多解决方案,代码如下:
//Forproc_Win32.cs
//对常用Win32 API函数及结构的声明
using System;
using System.Runtime.InteropServices;
namespace Farproc.Win32
{
/// <summary>
///
/// </summary>
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 wMilliseconds;
/// <summary>
/// 从System.DateTime转换。
/// </summary>
/// <param name="time">System.DateTime类型的时间。</param>
public void FromDateTime(DateTime time)
{
wYear = (ushort)time.Year;
wMonth = (ushort)time.Month;
wDayOfWeek = (ushort)time.DayOfWeek;
wDay = (ushort)time.Day;
wHour = (ushort)time.Hour;
wMinute = (ushort)time.Minute;
wSecond = (ushort)time.Second;
wMilliseconds = (ushort)time.Millisecond;
}
/// <summary>
/// 转换为System.DateTime类型。
/// </summary>
/// <returns></returns>
public DateTime ToDateTime()
{
return new DateTime(wYear, wMonth, wDay, wHour, wMinute, wSecond, wMilliseconds);
}
/// <summary>
/// 静态方法。转换为System.DateTime类型。
/// </summary>
/// <param name="time">SYSTEMTIME类型的时间。</param>
/// <returns></returns>
public static DateTime ToDateTime(SYSTEMTIME time)
{
return time.ToDateTime();
}
}
public class Win32API
{
[DllImport("Kernel32.dll")]
public static extern bool SetLocalTime( ref SYSTEMTIME Time );
[DllImport("Kernel32.dll")]
public static extern void GetLocalTime(ref SYSTEMTIME Time);
}
}
private void button1_Click(object sender, System.EventArgs e)
{
//取得当前系统时间
DateTime t = DateTime.Now;
//在当前时间上加上一周
t = t.AddDays(7);
//转换System.DateTime到SYSTEMTIME
SYSTEMTIME st = new SYSTEMTIME();
st.FromDateTime(t);
//调用Win32 API设置系统时间
Win32API.SetLocalTime(ref st);
//显示当前时间
MessageBox.Show(DateTime.Now.ToString());
}
试过很多次,都没能正确修改。
后来突发奇想,cmd不是能修改系统时间吗?
然后用cmd命令成功实现了功能。
/// <summary>
/// 获取网络日期时间
/// </summary>
/// <returns></returns>
public static string GetNetDateTime()
{
WebRequest request = null;
WebResponse response = null;
WebHeaderCollection headerCollection = null;
string datetime = string.Empty;
try
{
request = WebRequest.Create("https://www.baidu.com");
request.Timeout = 3000;
request.Credentials = CredentialCache.DefaultCredentials;
response = (WebResponse)request.GetResponse();
headerCollection = response.Headers;
foreach (var h in headerCollection.AllKeys)
{ if (h == "Date") { datetime = headerCollection[h]; } }
return datetime;
}
catch (Exception) { return datetime; }
finally
{
if (request != null)
{ request.Abort(); }
if (response != null)
{ response.Close(); }
if (headerCollection != null)
{ headerCollection.Clear(); }
}
}
//调用cmd修改系统时间
public static void setSystemTime(DateTime netTime)
{
System.Diagnostics.Process p = new System.Diagnostics.Process();
p.StartInfo.FileName = "cmd.exe";
p.StartInfo.UseShellExecute = false; //是否使用操作系统shell启动
p.StartInfo.RedirectStandardInput = true;//接受来自调用程序的输入信息
p.StartInfo.RedirectStandardOutput = true;//由调用程序获取输出信息
p.StartInfo.RedirectStandardError = true;//重定向标准错误输出
p.StartInfo.CreateNoWindow = true;//不显示程序窗口
p.Start();//启动程序
string dtdate = netTime.ToString("yyyy-MM-dd");//获取日期
string dttime = netTime.ToString("HH:mm:ss");//获取时间
string dos1 = "date " + dtdate;//命令1
string dos2 = "time " + dttime;//命令2
p.StandardInput.WriteLine(dos1 + "&" + dos2 + "&exit");
p.StandardInput.AutoFlush = true;
string output = p.StandardOutput.ReadToEnd();
p.WaitForExit();//等待程序执行完退出进程
p.Close();
}