public static Boolean IsDateTime(String datetime)
{
Boolean isdatetime = new Boolean();
DateTime dateTime;
try
{
dateTime = DateTime.ParseExact(datetime, "yyyy-MM-dd HH:mm:ss", CultureInfo.InvariantCulture);
isdatetime = true;
}
catch
{
isdatetime = false;
}
return isdatetime;
}