题
在用 C# 创建文件同步程序时,我尝试创建一种方法 copy
在 LocalFileItem
使用的类 System.IO.File.Copy(destination.Path, Path, true)
方法其中 Path
是一个 string
.
使用目标执行此代码后。 Path = "C:\\Test2"
和 this.Path = "C:\\Test\\F1.txt"
我收到一个异常,说我没有执行此操作所需的文件权限 C:\测试, , 但 C:\测试 属于我自己 (当前用户).
有谁知道发生了什么事,或者如何解决这个问题?
这是完整的原始代码。
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace Diones.Util.IO
{
/// <summary>
/// An object representation of a file or directory.
/// </summary>
public abstract class FileItem : IComparable
{
protected String path;
public String Path
{
set { this.path = value; }
get { return this.path; }
}
protected bool isDirectory;
public bool IsDirectory
{
set { this.isDirectory = value; }
get { return this.isDirectory; }
}
/// <summary>
/// Delete this fileItem.
/// </summary>
public abstract void delete();
/// <summary>
/// Delete this directory and all of its elements.
/// </summary>
protected abstract void deleteRecursive();
/// <summary>
/// Copy this fileItem to the destination directory.
/// </summary>
public abstract void copy(FileItem fileD);
/// <summary>
/// Copy this directory and all of its elements
/// to the destination directory.
/// </summary>
protected abstract void copyRecursive(FileItem fileD);
/// <summary>
/// Creates a FileItem from a string path.
/// </summary>
/// <param name="path"></param>
public FileItem(String path)
{
Path = path;
if (path.EndsWith("\\") || path.EndsWith("/")) IsDirectory = true;
else IsDirectory = false;
}
/// <summary>
/// Creates a FileItem from a FileSource directory.
/// </summary>
/// <param name="directory"></param>
public FileItem(FileSource directory)
{
Path = directory.Path;
}
public override String ToString()
{
return Path;
}
public abstract int CompareTo(object b);
}
/// <summary>
/// A file or directory on the hard disk
/// </summary>
public class LocalFileItem : FileItem
{
public override void delete()
{
if (!IsDirectory) File.Delete(this.Path);
else deleteRecursive();
}
protected override void deleteRecursive()
{
Directory.Delete(Path, true);
}
public override void copy(FileItem destination)
{
if (!IsDirectory) File.Copy(destination.Path, Path, true);
else copyRecursive(destination);
}
protected override void copyRecursive(FileItem destination)
{
Microsoft.VisualBasic.FileIO.FileSystem.CopyDirectory(
Path, destination.Path, true);
}
/// <summary>
/// Create's a LocalFileItem from a string path
/// </summary>
/// <param name="path"></param>
public LocalFileItem(String path)
: base(path)
{
}
/// <summary>
/// Creates a LocalFileItem from a FileSource path
/// </summary>
/// <param name="path"></param>
public LocalFileItem(FileSource path)
: base(path)
{
}
public override int CompareTo(object obj)
{
if (obj is FileItem)
{
FileItem fi = (FileItem)obj;
if (File.GetCreationTime(this.Path).CompareTo
(File.GetCreationTime(fi.Path)) > 0) return 1;
else if (File.GetCreationTime(this.Path).CompareTo
(File.GetCreationTime(fi.Path)) < 0) return -1;
else
{
if (File.GetLastWriteTime(this.Path).CompareTo
(File.GetLastWriteTime(fi.Path)) < 0) return -1;
else if (File.GetLastWriteTime(this.Path).CompareTo
(File.GetLastWriteTime(fi.Path)) > 0) return 1;
else return 0;
}
}
else
throw new ArgumentException("obj isn't a FileItem");
}
}
}
解决方案
看来您放错了 File.Copy() 中的参数,它应该是 File.Copy(string source, string destination)。
“C: est2”也是一个目录吗?您无法将文件复制到目录。使用类似的东西来代替:
File.Copy( sourceFile, Path.Combine(destinationDir,Path.GetFileName(sourceFile)) );
其他提示
我在这里有点猜测,但这可能是因为:
- 您正在尝试在 C: 中执行文件操作根?(如果您正在使用 Vista,Vista 可能会对此提供保护 - 不确定?)
- 您正在尝试复制到不存在的目录?
- 文件已经存在并且可能被锁定?(即您尚未关闭另一个应用程序实例)?
抱歉,我无法提供更多帮助,我很少遇到 File.Copy 问题。
我能够解决问题,Michal 为我指明了正确的方向。问题是我尝试使用 File.Copy 将文件从一个位置复制到另一个位置,而 Copy 方法仅将一个文件的所有内容复制到另一个文件(如果目标文件尚不存在,则创建目标文件)。解决方案是将文件名附加到目标目录。感谢您的帮助!
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