我如何重命名一个文件使用c# ?
当前回答
在我的例子中,我希望重命名文件的名称是唯一的,所以我在名称中添加了一个日期-时间戳。这样,'old'日志的文件名总是唯一的:
if (File.Exists(clogfile))
{
Int64 fileSizeInBytes = new FileInfo(clogfile).Length;
if (fileSizeInBytes > 5000000)
{
string path = Path.GetFullPath(clogfile);
string filename = Path.GetFileNameWithoutExtension(clogfile);
System.IO.File.Move(clogfile, Path.Combine(path, string.Format("{0}{1}.log", filename, DateTime.Now.ToString("yyyyMMdd_HHmmss"))));
}
}
其他回答
添加:
namespace System.IO
{
public static class ExtendedMethod
{
public static void Rename(this FileInfo fileInfo, string newName)
{
fileInfo.MoveTo(fileInfo.Directory.FullName + "\\" + newName);
}
}
}
然后……
FileInfo file = new FileInfo("c:\test.txt");
file.Rename("test2.txt");
看一下System.IO.File。移动,“移动”文件到一个新名称。
System.IO.File.Move("oldfilename", "newfilename");
// Source file to be renamed
string sourceFile = @"C:\Temp\MaheshChand.jpg";
// Create a FileInfo
System.IO.FileInfo fi = new System.IO.FileInfo(sourceFile);
// Check if file is there
if (fi.Exists)
{
// Move file with a new name. Hence renamed.
fi.MoveTo(@"C:\Temp\Mahesh.jpg");
Console.WriteLine("File Renamed.");
}
Use:
using System.IO;
string oldFilePath = @"C:\OldFile.txt"; // Full path of old file
string newFilePath = @"C:\NewFile.txt"; // Full path of new file
if (File.Exists(newFilePath))
{
File.Delete(newFilePath);
}
File.Move(oldFilePath, newFilePath);
First solution Avoid System.IO.File.Move solutions posted here (marked answer included). It fails over networks. However, copy/delete pattern works locally and over networks. Follow one of the move solutions, but replace it with Copy instead. Then use File.Delete to delete the original file. You can create a Rename method to simplify it. Ease of use Use the VB assembly in C#. Add reference to Microsoft.VisualBasic Then to rename the file: Microsoft.VisualBasic.FileIO.FileSystem.RenameFile(myfile, newName); Both are strings. Note that myfile has the full path. newName does not. For example: a = "C:\whatever\a.txt"; b = "b.txt"; Microsoft.VisualBasic.FileIO.FileSystem.RenameFile(a, b); The C:\whatever\ folder will now contain b.txt.
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