客戶的機器的系統時間經常出錯,導致給他們做的軟件無法正常使用,所以後來就加了一個同步網絡時間的小功能。實現起來很簡單,但是卻很使用。 這個小功能就是先獲取網絡時間,然後將系統的時間修改成從網絡獲得的時間。下面是具體的實現: 獲取網絡時間: [csharp] using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; using System.Net; using System.Net.Sockets; using System.Text.RegularExpressions; using System.Runtime.InteropServices; using System.Runtime; /// <summary> /// 網絡時間 /// </summary> public class NetTime { /// <summary> /// 獲取標准北京時間,讀取http://www.beijing-time.org/time.asp /// </summary> /// <returns>返回網絡時間</returns> public DateTime GetBeijingTime() { DateTime dt; WebRequest wrt = null; WebResponse wrp = null; try { wrt = WebRequest.Create("http://www.beijing-time.org/time.asp"); wrp = wrt.GetResponse(); string html = string.Empty; using (Stream stream = wrp.GetResponseStream()) { using (StreamReader sr = new StreamReader(stream, Encoding.UTF8)) { html = sr.ReadToEnd(); } } string[] tempArray = html.Split(';'); for (int i = 0; i < tempArray.Length; i++) { tempArray[i] = tempArray[i].Replace("\r\n", ""); } string year = tempArray[1].Split('=')[1]; string month = tempArray[2].Split('=')[1]; string day = tempArray[3].Split('=')[1]; string hour = tempArray[5].Split('=')[1]; string minite = tempArray[6].Split('=')[1]; string second = tempArray[7].Split('=')[1]; dt = DateTime.Parse(year + "-" + month + "-" + day + " " + hour + ":" + minite + ":" + second); } catch (WebException) { return DateTime.Parse("2011-1-1"); } catch (Exception) { return DateTime.Parse("2011-1-1"); } finally { if (wrp != null) wrp.Close(); if (wrt != null) wrt.Abort(); } return dt; } } 獲取網絡時間,返回一個DateTime對象,然後傳給設置系統時間的方法,修改系統時間。 同步系統時間: [csharp] using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; using System.Net; using System.Net.Sockets; using System.Text.RegularExpressions; using System.Runtime.InteropServices; using System.Runtime; /// <summary> /// 更新系統時間 /// </summary> public class UpdateTime { //設置系統時間的API函數 [DllImport("kernel32.dll")] private static extern bool SetLocalTime(ref SYSTEMTIME time); [StructLayout(LayoutKind.Sequential)] private struct SYSTEMTIME { public short year; public short month; public short dayOfWeek; public short day; public short hour; public short minute; public short second; public short milliseconds; } /// <summary> /// 設置系統時間 /// </summary> /// <param name="dt">需要設置的時間</param> /// <returns>返回系統時間設置狀態,true為成功,false為失敗</returns> public static bool SetDate(DateTime dt) { SYSTEMTIME st; st.year = (short)dt.Year; st.month = (short)dt.Month; st.dayOfWeek = (short)dt.DayOfWeek; st.day = (short)dt.Day; st.hour = (short)dt.Hour; st.minute = (short)dt.Minute; st.second = (short)dt.Second; st.milliseconds = (short)dt.Millisecond; bool rt = SetLocalTime(ref st); return rt; } } 兩個方法分別寫在了兩個類裡面,只需要在客戶端實例化兩個對象,然後依次調用其方法即可,簡單實用。 PS:Win8修改系統時間需要管理員的權限,下篇博客介紹如何讓程序默認以管理員權限運行,敬請期待!