我有一个任务,需要使用C#在文件夹中更改一些文件的名称(即为每个名称动态添加id)。
例如:将help.txt更改为1help.txt。
我该如何完成这个任务?
看一下FileInfo。
按照以下方式操作:
void RenameThem()
{
DirectoryInfo d = new DirectoryInfo("c:/dir/");
FileInfo[] infos = d.GetFiles("*.myfiles");
foreach(FileInfo f in infos)
{
// Do the renaming here
File.Move(f.FullName, Path.Combine(f.DirectoryName, "1" + f.Name));
}
}
我会在这里放置一些代码,因为我需要为自己的目的编写此代码。
using System;
using System.IO;
public static class FileSystemInfoExtensions
{
public static void Rename(this FileSystemInfo item, string newName)
{
if (item == null)
{
throw new ArgumentNullException("item");
}
FileInfo fileInfo = item as FileInfo;
if (fileInfo != null)
{
fileInfo.Rename(newName);
return;
}
DirectoryInfo directoryInfo = item as DirectoryInfo;
if (directoryInfo != null)
{
directoryInfo.Rename(newName);
return;
}
throw new ArgumentException("Item", "Unexpected subclass of FileSystemInfo " + item.GetType());
}
public static void Rename(this FileInfo file, string newName)
{
// Validate arguments.
if (file == null)
{
throw new ArgumentNullException("file");
}
else if (newName == null)
{
throw new ArgumentNullException("newName");
}
else if (newName.Length == 0)
{
throw new ArgumentException("The name is empty.", "newName");
}
else if (newName.IndexOf(Path.DirectorySeparatorChar) >= 0
|| newName.IndexOf(Path.AltDirectorySeparatorChar) >= 0)
{
throw new ArgumentException("The name contains path separators. The file would be moved.", "newName");
}
// Rename file.
string newPath = Path.Combine(file.DirectoryName, newName);
file.MoveTo(newPath);
}
public static void Rename(this DirectoryInfo directory, string newName)
{
// Validate arguments.
if (directory == null)
{
throw new ArgumentNullException("directory");
}
else if (newName == null)
{
throw new ArgumentNullException("newName");
}
else if (newName.Length == 0)
{
throw new ArgumentException("The name is empty.", "newName");
}
else if (newName.IndexOf(Path.DirectorySeparatorChar) >= 0
|| newName.IndexOf(Path.AltDirectorySeparatorChar) >= 0)
{
throw new ArgumentException("The name contains path separators. The directory would be moved.", "newName");
}
// Rename directory.
string newPath = Path.Combine(directory.Parent.FullName, newName);
directory.MoveTo(newPath);
}
}
FileInfo
编写了Rename()
扩展方法的原因。 - svickSystem.IO
命名空间中的File.Move(source,destination)
函数。此外,请查看同一命名空间的DirectoryInfo
类以访问文件夹的内容。在 .NET Framework 4.0 上,我使用只需要一个参数的 FileInfo.MoveTo()
方法
仅用于移动文件时,我的方法看起来像这样:
private void Move(string sourceDirName, string destDirName)
{
DirectoryInfo dir = new DirectoryInfo(sourceDirName);
FileInfo[] files = null;
files = dir.GetFiles();
foreach (FileInfo file in files)
{
string temppath = Path.Combine(destDirName, file.Name);
file.MoveTo(temppath);
}
}
重命名文件的方法如下:
private void Rename(string folderPath)
{
int fileCount = 0;
DirectoryInfo dir = new DirectoryInfo(folderPath);
files = dir.GetFiles();
foreach (FileInfo file in files)
{
fileCount += 1;
string newFileName = fileCount.ToString() + file.Name;
string temppath = Path.Combine(folderPath, newFileName);
file.MoveTo(temppath);
}
}
正如您所看到的,重命名文件的语法与移动文件的语法几乎相同,只需要在使用MoveTo()
方法之前修改filename
即可。
string oldFilePath = Path.Combine( Server.MapPath("~/uploads"), "oldFileName");
string newFilePath = Path.Combine( Server.MapPath("~/uploads"), "newFileName");
File.Move(oldFilePath, newFilePath);