我如何重命名一个文件使用c# ?
看一下System.IO.File。移动，“移动”文件到一个新名称。
System.IO.File.Move("oldfilename", "newfilename");
当c#没有某些特性时，我就用c++或C:
public partial class Program
{
[DllImport("msvcrt", CallingConvention = CallingConvention.Cdecl, SetLastError = true)]
public static extern int rename(
[MarshalAs(UnmanagedType.LPStr)]
string oldpath,
[MarshalAs(UnmanagedType.LPStr)]
string newpath);
static void FileRename()
{
while (true)
{
Console.Clear();
Console.Write("Enter a folder name: ");
string dir = Console.ReadLine().Trim('\\') + "\\";
if (string.IsNullOrWhiteSpace(dir))
break;
if (!Directory.Exists(dir))
{
Console.WriteLine("{0} does not exist", dir);
continue;
}
string[] files = Directory.GetFiles(dir, "*.mp3");
for (int i = 0; i < files.Length; i++)
{
string oldName = Path.GetFileName(files[i]);
int pos = oldName.IndexOfAny(new char[] { '0', '1', '2' });
if (pos == 0)
continue;
string newName = oldName.Substring(pos);
int res = rename(files[i], dir + newName);
}
}
Console.WriteLine("\n\t\tPress any key to go to main menu\n");
Console.ReadKey(true);
}
}
注意:在这个示例代码中，我们打开一个目录并搜索PDF文件，文件名中包含开括号和闭括号。您可以检查和替换名称中的任何字符，或者使用替换函数指定一个全新的名称。
从这段代码中还可以使用其他方法来进行更详细的重命名，但我的主要目的是展示如何使用File。移动做批量重命名。当我在我的笔记本电脑上运行它时，它可以处理180个目录中的335个PDF文件。这是一时兴起的代码，还有更详细的方法来实现它。
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace BatchRenamer
{
class Program
{
static void Main(string[] args)
{
var dirnames = Directory.GetDirectories(@"C:\the full directory path of files to rename goes here");
int i = 0;
try
{
foreach (var dir in dirnames)
{
var fnames = Directory.GetFiles(dir, "*.pdf").Select(Path.GetFileName);
DirectoryInfo d = new DirectoryInfo(dir);
FileInfo[] finfo = d.GetFiles("*.pdf");
foreach (var f in fnames)
{
i++;
Console.WriteLine("The number of the file being renamed is: {0}", i);
if (!File.Exists(Path.Combine(dir, f.ToString().Replace("(", "").Replace(")", ""))))
{
File.Move(Path.Combine(dir, f), Path.Combine(dir, f.ToString().Replace("(", "").Replace(")", "")));
}
else
{
Console.WriteLine("The file you are attempting to rename already exists! The file path is {0}.", dir);
foreach (FileInfo fi in finfo)
{
Console.WriteLine("The file modify date is: {0} ", File.GetLastWriteTime(dir));
}
}
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.Read();
}
}
}
在文件中。方法，这将不会覆盖文件，如果它已经存在。它会抛出一个异常。
所以我们需要检查文件是否存在。
/* Delete the file if exists, else no exception thrown. */
File.Delete(newFileName); // Delete the existing file if exists
File.Move(oldFileName,newFileName); // Rename the oldFileName into newFileName
或者用try catch将其包围以避免异常。
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");
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.
你可以将它复制为一个新文件，然后使用System.IO.File类删除旧文件:
if (File.Exists(oldName))
{
File.Copy(oldName, newName, true);
File.Delete(oldName);
}
Move是做同样的=复制和删除旧的。
File.Move(@"C:\ScanPDF\Test.pdf", @"C:\BackupPDF\" + string.Format("backup-{0:yyyy-MM-dd_HH:mm:ss}.pdf", DateTime.Now));
Use:
public static class FileInfoExtensions
{
/// <summary>
/// Behavior when a new filename exists.
/// </summary>
public enum FileExistBehavior
{
/// <summary>
/// None: throw IOException "The destination file already exists."
/// </summary>
None = 0,
/// <summary>
/// Replace: replace the file in the destination.
/// </summary>
Replace = 1,
/// <summary>
/// Skip: skip this file.
/// </summary>
Skip = 2,
/// <summary>
/// Rename: rename the file (like a window behavior)
/// </summary>
Rename = 3
}
/// <summary>
/// Rename the file.
/// </summary>
/// <param name="fileInfo">the target file.</param>
/// <param name="newFileName">new filename with extension.</param>
/// <param name="fileExistBehavior">behavior when new filename is exist.</param>
public static void Rename(this System.IO.FileInfo fileInfo, string newFileName, FileExistBehavior fileExistBehavior = FileExistBehavior.None)
{
string newFileNameWithoutExtension = System.IO.Path.GetFileNameWithoutExtension(newFileName);
string newFileNameExtension = System.IO.Path.GetExtension(newFileName);
string newFilePath = System.IO.Path.Combine(fileInfo.Directory.FullName, newFileName);
if (System.IO.File.Exists(newFilePath))
{
switch (fileExistBehavior)
{
case FileExistBehavior.None:
throw new System.IO.IOException("The destination file already exists.");
case FileExistBehavior.Replace:
System.IO.File.Delete(newFilePath);
break;
case FileExistBehavior.Rename:
int dupplicate_count = 0;
string newFileNameWithDupplicateIndex;
string newFilePathWithDupplicateIndex;
do
{
dupplicate_count++;
newFileNameWithDupplicateIndex = newFileNameWithoutExtension + " (" + dupplicate_count + ")" + newFileNameExtension;
newFilePathWithDupplicateIndex = System.IO.Path.Combine(fileInfo.Directory.FullName, newFileNameWithDupplicateIndex);
}
while (System.IO.File.Exists(newFilePathWithDupplicateIndex));
newFilePath = newFilePathWithDupplicateIndex;
break;
case FileExistBehavior.Skip:
return;
}
}
System.IO.File.Move(fileInfo.FullName, newFilePath);
}
}
如何使用此代码
class Program
{
static void Main(string[] args)
{
string targetFile = System.IO.Path.Combine(@"D://test", "New Text Document.txt");
string newFileName = "Foo.txt";
// Full pattern
System.IO.FileInfo fileInfo = new System.IO.FileInfo(targetFile);
fileInfo.Rename(newFileName);
// Or short form
new System.IO.FileInfo(targetFile).Rename(newFileName);
}
}
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"))));
}
}
我找不到适合我的方法，所以我提出了我的版本。当然，它需要输入和错误处理。
public void Rename(string filePath, string newFileName)
{
var newFilePath = Path.Combine(Path.GetDirectoryName(filePath), newFileName + Path.GetExtension(filePath));
System.IO.File.Move(filePath, newFilePath);
}
public static class ImageRename
{
public static void ApplyChanges(string fileUrl,
string temporaryImageName,
string permanentImageName)
{
var currentFileName = Path.Combine(fileUrl,
temporaryImageName);
if (!File.Exists(currentFileName))
throw new FileNotFoundException();
var extention = Path.GetExtension(temporaryImageName);
var newFileName = Path.Combine(fileUrl,
$"{permanentImageName}
{extention}");
if (File.Exists(newFileName))
File.Delete(newFileName);
File.Move(currentFileName, newFileName);
}
}
我遇到过一种情况，当我不得不在事件处理程序中重命名文件时，它会触发任何文件更改，包括重命名，并且要跳过永远重命名我必须重命名的文件，使用:
创建副本 移除原始的
File.Copy(fileFullPath, destFileName); // Both have the format of "D:\..\..\myFile.ext"
Thread.Sleep(100); // Wait for the OS to unfocus the file
File.Delete(fileFullPath);
没有一个答案提到编写一个单元可测试的解决方案。您可以使用system . io . abstractions，因为它为文件系统操作提供了可测试的包装，您可以使用它创建模拟文件系统对象并编写单元测试。
using System.IO.Abstractions;
IFileInfo fileInfo = _fileSystem.FileInfo.FromFileName("filePathAndName");
fileInfo.MoveTo(Path.Combine(fileInfo.DirectoryName, newName));
它已经过测试，它正在重命名文件的工作代码。
private static void Rename_File(string FileFullPath, string NewName) // nes name without directory actualy you can simply rename with fileinfo.MoveTo(Fullpathwithnameandextension);
{
FileInfo fileInfo = new FileInfo(FileFullPath);
string DirectoryRoot = Directory.GetParent(FileFullPath).FullName;
string filecreator = FileFullPath.Substring(DirectoryRoot.Length,FileFullPath.Length-DirectoryRoot.Length);
filecreator = DirectoryRoot + NewName;
try
{
fileInfo.MoveTo(filecreator);
}
catch(Exception ex)
{
Console.WriteLine(filecreator);
Console.WriteLine(ex.Message);
Console.ReadKey();
}
enter code here
// string FileDirectory = Directory.GetDirectoryRoot()
}
// 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.");
}
public void RenameFile(string filePath, string newName)
{
FileInfo fileInfo = new FileInfo(filePath);
fileInfo.MoveTo(fileInfo.Directory.FullName + "\\" + newName);
}
