c#-4.0 - 访问路径被拒绝 - C#

Question

我编写了一个复制文件的程序。有时，在尝试复制文件时会引发异常 - “访问路径...被拒绝”。 (可能是因为另一个程序使用此文件)。

注意:我以管理员身份运行该程序

但是!当我手动复制同一文件时，它可以工作!

为什么？程序出了什么问题？

try
                {
                    CopyClass.Copy(m_FilesSources[i].Path, m_FilesDestinations[i], true, m_FilesSources[i].Postfix);
                }
catch (Exception ex)
                {
                    isAccessDenied = true;
                    tbLog.Text += " - " + ex.Message + "\n";
                }


class CopyClass
{
    public static bool Copy(string sourceDirPath, string destDirPath, bool copySubDirs, string postfix)
    {
            if (postfix == null)
            {
                FileCopy(sourceDirPath, destDirPath, copySubDirs);
                return true;
            }
            DirectoryCopy(sourceDirPath, destDirPath, copySubDirs, postfix);
            return true;
    }

    public static void DirectoryCopy(string sourceDirName, string destDirName, bool copySubDirs, string postfix)
    {
        // Get the subdirectories for the specified directory.
        DirectoryInfo dir = new DirectoryInfo(sourceDirName);
        DirectoryInfo[] dirs = dir.GetDirectories();

        // If the destination directory doesn't exist, create it. 
        if (!Directory.Exists(destDirName))
        {
            Directory.CreateDirectory(destDirName);
        }

        // Get the files in the directory and copy them to the new location.
        FileInfo[] files = dir.GetFiles();

        foreach (FileInfo file in files)
            {
                string temppath = System.IO.Path.Combine(destDirName, file.Name);
                if (postfix == ".")
                {
                    file.CopyTo(temppath, copySubDirs);
                }
                else if (file.Name.EndsWith(postfix))
                {
                    file.CopyTo(temppath, copySubDirs);
                }
            }

        // If copying subdirectories, copy them and their contents to new location. 
        if (copySubDirs)
        {
            foreach (DirectoryInfo subdir in dirs)
            {
                string tempPath = System.IO.Path.Combine(destDirName, subdir.Name);
                DirectoryCopy(subdir.FullName, tempPath, copySubDirs, postfix);
            }
        }
    }

    public static void FileCopy(string sourceFileName, string destDirName, bool overwrite)
    {
        string destFileName = destDirName + sourceFileName.Substring(sourceFileName.LastIndexOf('\\') + 1);

        // If the destination directory doesn't exist, create it. 
        if (!Directory.Exists(destDirName))
        {
            Directory.CreateDirectory(destDirName);
        }
        System.IO.File.Copy(sourceFileName, destFileName, overwrite);
    }
}

}

Answer 1

问题是我尝试覆盖的文件是只读的。为了解决这个问题，我手动将目标文件的属性更改为正常(不是只读):

if (File.Exists(destFileName))
            {
                File.SetAttributes(destFileName, FileAttributes.Normal);           // Makes every read-only file into a RW file (in order to prevent "access denied" error)
            }

希望这对您有所帮助。