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操作說明：複製目錄

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此文章示範如何使用 I/O 類別，將某個目錄的內容同步複製到另一個位置。

如需非同步檔案複製的範例，請參閱非同步檔案 I/O。

此範例藉由將 CopyDirectory 方法的 recursive 參數設定為 true 來複製子目錄。 CopyDirectory 方法會以遞迴方式複製子目錄，方法是在每個子目錄上呼叫其本身，直到沒有其他要複製的子目錄為止。

範例

using System.IO;

CopyDirectory(@".\", @".\copytest", true);

static void CopyDirectory(string sourceDir, string destinationDir, bool recursive)
{
    // Get information about the source directory
    var dir = new DirectoryInfo(sourceDir);

    // Check if the source directory exists
    if (!dir.Exists)
        throw new DirectoryNotFoundException($"Source directory not found: {dir.FullName}");

    // Cache directories before we start copying
    DirectoryInfo[] dirs = dir.GetDirectories();

    // Create the destination directory
    Directory.CreateDirectory(destinationDir);

    // Get the files in the source directory and copy to the destination directory
    foreach (FileInfo file in dir.GetFiles())
    {
        string targetFilePath = Path.Combine(destinationDir, file.Name);
        file.CopyTo(targetFilePath);
    }

    // If recursive and copying subdirectories, recursively call this method
    if (recursive)
    {
        foreach (DirectoryInfo subDir in dirs)
        {
            string newDestinationDir = Path.Combine(destinationDir, subDir.Name);
            CopyDirectory(subDir.FullName, newDestinationDir, true);
        }
    }
}

Imports System.IO

Module Program
    Sub Main(args As String())
        CopyDirectory(".\", ".\copytest", True)
    End Sub

    Public Sub CopyDirectory(sourceDir As String, destinationDir As String, recursive As Boolean)

        ' Get information about the source directory
        Dim dir As New DirectoryInfo(sourceDir)

        ' Check if the source directory exists
        If Not dir.Exists Then
            Throw New DirectoryNotFoundException($"Source directory not found: {dir.FullName}")
        End If

        ' Cache directories before we start copying
        Dim dirs As DirectoryInfo() = dir.GetDirectories()

        ' Create the destination directory
        Directory.CreateDirectory(destinationDir)

        ' Get the files in the source directory and copy to the destination directory
        For Each file As FileInfo In dir.GetFiles()
            Dim targetFilePath As String = Path.Combine(destinationDir, file.Name)
            file.CopyTo(targetFilePath)
        Next

        ' If recursive and copying subdirectories, recursively call this method
        If recursive Then
            For Each subDir As DirectoryInfo In dirs
                Dim newDestinationDir As String = Path.Combine(destinationDir, subDir.Name)
                CopyDirectory(subDir.FullName, newDestinationDir, True)
            Next
        End If

    End Sub
End Module

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