此方法用于获取新的DateTimeOffset对象，该对象将指定的毫秒数添加到当前实例的值。
Syntax: public DateTimeOffset AddMilliseconds (double milliseconds);
Here, it takes a number of whole and fractional milliseconds. The number can be negative or positive.
Return Value: This method returns an object whose value is the sum of the date and time represented by the current DateTimeOffset object and the number of whole milliseconds represented by milliseconds.
Exception: This method will give ArgumentOutOfRangeException if the resulting DateTimeOffset value is less than MinValue or greater than MaxValue.
下面的程序说明了DateTimeOffset.AddMilliseconds(Double)方法的用法：
范例1：
// C# program to demonstrate the
// DateTimeOffset.AddMilliseconds(Double)
// Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
try {
// creating object of DateTimeOffset
DateTimeOffset offset = new DateTimeOffset(2007,
6, 1, 7, 55, 0, new TimeSpan(-5, 0, 0));
// a number of whole and fractional milliseconds
// instance using AddMilliseconds() method
DateTimeOffset value = offset.AddMilliseconds(2000);
// Display the time
Console.WriteLine("DateTimeOffset is {0}", value);
}
catch (ArgumentOutOfRangeException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
输出：
DateTimeOffset is 06/01/2007 07:55:02 -05:00
示例2：对于ArgumentOutOfRangeException
// C# program to demonstrate the
// DateTimeOffset.AddMilliseconds(Double)
// Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
try {
// creating object of DateTimeOffset
DateTimeOffset offset = DateTimeOffset.MaxValue;
// a number of whole and fractional milliseconds
// instance using AddMilliseconds() method
DateTimeOffset value = offset.AddMilliseconds(2000);
// Display the time
Console.WriteLine("DateTimeOffset is {0}", value);
}
catch (ArgumentOutOfRangeException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
输出：
Exception Thrown: System.ArgumentOutOfRangeException
参考：
- https://docs.microsoft.com/zh-cn/dotnet/api/system.datetimeoffset.addmilliseconds?view=netframework-4.7.2