C# 将文件从一个位置复制到另一个位置

copy files from one location to another

提问by nav100

I am trying to create a directory and subdirectories and copy files from on one location to another location. The following code works but it doesn't create a parent directory(10_new) if there are sub directories. I am trying to copy all the contents(including subdirectories) from "c:\\sourceLoc\\10"to "c:\\destLoc\\10_new"folder. If "10_new"doesn't exist then I should create this folder. Please assist.

我正在尝试创建一个目录和子目录，并将文件从一个位置复制到另一个位置。以下代码有效，但如果有子目录，则不会创建父目录（10_new）。我正在尝试将所有内容（包括子目录）复制"c:\\sourceLoc\\10"到"c:\\destLoc\\10_new"文件夹中。如果"10_new"不存在，那么我应该创建这个文件夹。请协助。

string sourceLoc = "c:\sourceLoc\10";
string destLoc = "c:\destLoc\10_new";

foreach (string dirPath in Directory.GetDirectories(sourceLoc, "*", SearchOption.AllDirectories))
{
    Directory.CreateDirectory(dirPath.Replace(sourceLoc, destLoc));
    if (Directory.Exists(sourceLoc))
    {
         //Copy all the files
         foreach (string newPath in Directory.GetFiles(sourceLoc, "*.*", SearchOption.AllDirectories))
             File.Copy(newPath, newPath.Replace(sourceLoc, destLoc));
    }
}

采纳答案by Justin

From looking at your code, you never check for the existence of the parent folders. You jump to getting all the child folders first.

通过查看您的代码，您永远不会检查父文件夹是否存在。您首先跳转到获取所有子文件夹。

if (!Directory.Exists(@"C:\my\dir")) Directory.CreateDirectory(@"C:\my\dir");

回答by jason

Before doing File.Copy, check to make sure the folder exists. If it doesn't create it. This function will check if a path exists, if it doesnt, it will create it. If it fails to create it, for what ever reason, it will return false. Otherwise, true.

在执行 File.Copy 之前，请检查以确保该文件夹存在。如果它不创建它。此函数将检查路径是否存在，如果不存在，它将创建它。如果它无法创建它，无论出于何种原因，它都会返回 false。否则为真。

 Private Function checkDir(ByVal path As String) As Boolean
        Dim dir As New DirectoryInfo(path)
        Dim exist As Boolean = True
        If Not dir.Exists Then
            Try
                dir.Create()
            Catch ex As Exception
                exist = False
            End Try
        End If
        Return exist
    End Function

Remember, all .Net languages compile down to the CLR (common language runtime) so it does not matter if this is in VB.Net or C#. A good way to convert between the two is: http://converter.telerik.com/

请记住，所有 .Net 语言都编译为 CLR（公共语言运行时），因此它是在 VB.Net 还是 C# 中都没有关系。在两者之间转换的一个好方法是：http: //converter.telerik.com/

回答by abc123

Here is how to copy all files in a directory to another directory

以下是如何将目录中的所有文件复制到另一个目录

This is taken from http://msdn.microsoft.com/en-us/library/cc148994.aspx

这取自http://msdn.microsoft.com/en-us/library/cc148994.aspx

string sourcePath = "c:\sourceLoc\10";
string targetPath = "c:\destLoc\10_new";
string fileName = string.Empty;
string destFile = string.Empty;

// To copy all the files in one directory to another directory. 
// Get the files in the source folder. (To recursively iterate through 
// all subfolders under the current directory, see 
// "How to: Iterate Through a Directory Tree.")
// Note: Check for target path was performed previously 
//       in this code example. 
if (System.IO.Directory.Exists(sourcePath))
{
    string[] files = System.IO.Directory.GetFiles(sourcePath);

    // Copy the files and overwrite destination files if they already exist. 
    foreach (string s in files)
    {
        // Use static Path methods to extract only the file name from the path.
        fileName = System.IO.Path.GetFileName(s);
        destFile = System.IO.Path.Combine(targetPath, fileName);
        System.IO.File.Copy(s, destFile, true);
    }
}
else
{
    Console.WriteLine("Source path does not exist!");
}

Recursive Directory/Sub-directory

递归目录/子目录

public class RecursiveFileSearch
{
    static System.Collections.Specialized.StringCollection log = new System.Collections.Specialized.StringCollection();

    static void Main()
    {
        // Start with drives if you have to search the entire computer.
        string[] drives = System.Environment.GetLogicalDrives();

        foreach (string dr in drives)
        {
            System.IO.DriveInfo di = new System.IO.DriveInfo(dr);

            // Here we skip the drive if it is not ready to be read. This
            // is not necessarily the appropriate action in all scenarios.
            if (!di.IsReady)
            {
                Console.WriteLine("The drive {0} could not be read", di.Name);
                continue;
            }
            System.IO.DirectoryInfo rootDir = di.RootDirectory;
            WalkDirectoryTree(rootDir);
        }

        // Write out all the files that could not be processed.
        Console.WriteLine("Files with restricted access:");
        foreach (string s in log)
        {
            Console.WriteLine(s);
        }
        // Keep the console window open in debug mode.
        Console.WriteLine("Press any key");
        Console.ReadKey();
    }

    static void WalkDirectoryTree(System.IO.DirectoryInfo root)
    {
        System.IO.FileInfo[] files = null;
        System.IO.DirectoryInfo[] subDirs = null;

        // First, process all the files directly under this folder
        try
        {
            files = root.GetFiles("*.*");
        }
        // This is thrown if even one of the files requires permissions greater
        // than the application provides.
        catch (UnauthorizedAccessException e)
        {
            // This code just writes out the message and continues to recurse.
            // You may decide to do something different here. For example, you
            // can try to elevate your privileges and access the file again.
            log.Add(e.Message);
        }

        catch (System.IO.DirectoryNotFoundException e)
        {
            Console.WriteLine(e.Message);
        }

        if (files != null)
        {
            foreach (System.IO.FileInfo fi in files)
            {
                // In this example, we only access the existing FileInfo object. If we
                // want to open, delete or modify the file, then
                // a try-catch block is required here to handle the case
                // where the file has been deleted since the call to TraverseTree().
                Console.WriteLine(fi.FullName);
            }

            // Now find all the subdirectories under this directory.
            subDirs = root.GetDirectories();

            foreach (System.IO.DirectoryInfo dirInfo in subDirs)
            {
                // Resursive call for each subdirectory.
                WalkDirectoryTree(dirInfo);
            }
        }            
    }
}

回答by cande

It is impossible to copy or move files with C# in windows 7.

在 Windows 7 中无法使用 C# 复制或移动文件。

It will instead create a file of zero bytes.

相反，它将创建一个零字节的文件。