C#實現UTC時間與Datetime轉換

爲了便於傳輸，通訊過程當中傳輸的都是：當前時間跟標準時間相隔的秒數，而且是以16進制字節的形式傳輸的。

 1 public double ConvertDateTimeInt(System.DateTime time)//將時間格式的數據類型轉換成浮點數類型   
 2         {
 3             double intResult = 0;
 4             System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
 5             intResult =(time - startTime).TotalSeconds;
 6             return intResult;
 7         }
 8 
 9         public DateTime ConvertIntDatetime(double utc)
10         {
11             System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
12             startTime = startTime.AddSeconds(utc);
13             startTime = startTime.AddHours(8);//轉化爲北京時間(北京時間=UTC時間+8小時 )
14             return startTime;
15         }

 1  public byte[] ConvertDoubleByte(double d) 
 2         {
 3             byte[] result = new byte[4];
 4             float f=(float)d;
 5             result = BitConverter.GetBytes(f);
 6             return result;
 7         }
 8 
 9         public double  ConvertByteDouble(byte [] d)
10         {
11             double result=0;
12             float q = BitConverter.ToSingle(d, 0);
13             result = (double)q;
14             return result;
15         }

 1 private void button1_Click(object sender, EventArgs e)//這種只是顯示的形式不一樣，未達到目的
 2          {
 3              DateTime utc_tem = DateTime.UtcNow;
 4 
 5              double utc = ConvertDateTimeInt(utc_tem);//相對應的秒數！
 6              byte[] s = new byte[4];
 7             s = ConvertDoubleByte(utc);
 8 
 9 
10             DateTime mytime = ConvertIntDatetime(1429647491.3936753);
11             byte[] b = new byte[4] { 0x80,0x6d,0xaa,0x4e};
12             mytime = ConvertIntDatetime(ConvertByteDouble(b));
13         }