File.SetCreationTimeUtc(String,DateTime)是一个内置的File类方法,该方法用于以协调世界时(UTC)设置创建文件的日期和时间。
句法:
public static void SetCreationTimeUtc (string path, DateTime creationTimeUtc);
参数:该函数接受两个参数,如下所示:
- path: The specified file for which to set the creation date and time information.
- creationTimeUtc: The UTC Date and time containing the value to set for the creation of path.
例外情况:
- FileNotFoundException:找不到指定的路径。
- ArgumentException:路径是长度为零的字符串,仅包含空格,或者由InvalidPathChars定义的一个或多个无效字符。
- ArgumentNullException:路径为null。
- PathTooLongException:指定的路径,文件名或两者都超过系统定义的最大长度。
- IOException:执行操作时发生I / O错误。
- ArgumentOutOfRangeException:创建时间指定了此操作所允许的日期,时间或两者之外的值。
- UnauthorizedAccessException:调用者没有所需的权限。
- NotSupportedException:路径格式无效。
下面是说明File.SetCreationTimeUtc(String,DateTime)方法的程序。
程序1:在运行下面的代码之前,将创建一个文件file.txt ,其内容如下所示-
C#
// C# program to illustrate the usage
// of File.SetCreationTimeUtc(String, DateTime) method
// Using System and System.IO namespaces
using System;
using System.IO;
class GFG {
static void Main()
{
// Specifying a new date and time
DateTime D1 = new DateTime(2017, 12, 25, 2, 6, 8);
// Calling SetCreationTimeUtc() function
// to set the new date and time
File.SetCreationTimeUtc("file.txt", D1);
// Calling the GetCreationTimeUtc() function
// to get the creation date and time
DateTime D2 = File.GetCreationTimeUtc("file.txt");
Console.WriteLine("The File Creation Time in UTC is : " + D2.ToString());
}
}
C#
// C# program to illustrate the usage
// of File.SetCreationTimeUtc(String, DateTime) method
// Using System and System.IO namespaces
using System;
using System.IO;
class GFG {
static void Main()
{
// Calling the GetCreationTimeUtc() function to
// get the original file creation date and time in UTC
DateTime D1 = File.GetCreationTimeUtc("file.txt");
Console.WriteLine("File Creation Old Time in UTC is: " + D1.ToString());
// Specifying a new date and time
DateTime D2 = new DateTime(2017, 12, 25, 2, 6, 8);
// Calling SetCreationTimeUtc() function
// to set the new date and time
File.SetCreationTimeUtc("file.txt", D2);
// Calling the GetCreationTimeUtc() function
// to get the new creation date and time
DateTime D3 = File.GetCreationTimeUtc("file.txt");
Console.WriteLine("File Creation new Time in UTC is : " + D3.ToString());
}
}
输出:
The File Creation Time in UTC is : 25/12/2017 02:06:08 AM
程序2:在运行下面的代码之前,将创建一个文件file.txt ,其内容如下所示:
C#
// C# program to illustrate the usage
// of File.SetCreationTimeUtc(String, DateTime) method
// Using System and System.IO namespaces
using System;
using System.IO;
class GFG {
static void Main()
{
// Calling the GetCreationTimeUtc() function to
// get the original file creation date and time in UTC
DateTime D1 = File.GetCreationTimeUtc("file.txt");
Console.WriteLine("File Creation Old Time in UTC is: " + D1.ToString());
// Specifying a new date and time
DateTime D2 = new DateTime(2017, 12, 25, 2, 6, 8);
// Calling SetCreationTimeUtc() function
// to set the new date and time
File.SetCreationTimeUtc("file.txt", D2);
// Calling the GetCreationTimeUtc() function
// to get the new creation date and time
DateTime D3 = File.GetCreationTimeUtc("file.txt");
Console.WriteLine("File Creation new Time in UTC is : " + D3.ToString());
}
}
输出:
File Creation Old Time in UTC is: 4/25/2020 11:26:14 AM
File Creation new Time in UTC is : 25/12/2017 02:06:08 AM