本地时间和GMT(UTC)时间的转换

/// <summary>   
/// 本地时间转成GMT时间   
/// </summary>   
public static string ToGMTString(DateTime dt)  
{  
    return dt.ToUniversalTime().ToStrin("r");  
}  

/// <summary>   
/// 本地时间转成GMT格式的时间   
/// </summary>   
public static string ToGMTFormat(DateTime dt)  
{  
    return dt.ToString("r") + dt.ToString("zzz").Replace(":", "");  
}  

/// <summary>   
/// GMT时间转成本地时间   
/// </summary>   
/// <param name="gmt">字符串形式的GMT时间</param>   
/// <returns></returns>   
public static DateTime GMT2Local(string gmt)  
{  
    DateTime dt = DateTime.MinValue;  
    try  
    {  
        string pattern = "";  
        if (gmt.IndexOf("+0") != -1)  
        {  
            gmt = gmt.Replace("GMT", "");  
            pattern = "ddd, dd MMM yyyy HH':'mm':'ss zzz";  
        }  
        if (gmt.ToUpper().IndexOf("GMT") != -1)  
        {  
            pattern = "ddd, dd MMM yyyy HH':'mm':'ss 'GMT'";  
        }  
        if (pattern != "")  
        {  
            dt = DateTime.ParseExact(gmt, pattern, System.Globalization.CultureInfo.InvariantCulture, System.Globalization.DateTimeStyles.AdjustToUniversal);  
            dt = dt.ToLocalTime();  
        }  
        else  
        {  
            dt = Convert.ToDateTime(gmt);  
        }  
    }  
    catch  
    {  
    }  
    return dt;  
} 

 

 /// <summary>
        /// 日期转换
        /// </summary>
        /// <param name="time">新浪微博中返回的类似"Mon Oct 18 12:28:54 +0800 2010"这样的时间</param>
        /// <returns>DateTime</returns>
        public static DateTime ConverDateTime(string time)
        {
            string[] cx = time.Split(' ');
            System.Globalization.DateTimeFormatInfo g = new System.Globalization.DateTimeFormatInfo();
            g.LongDatePattern = "dd MMMM yyyy";
            DateTime DT = DateTime.Parse(string.Format("{0} {1} {2} {3}", cx[2], cx[1], cx[5], cx[3]), g);
            return DT;
        }