如何用C#统计FTP服务器XYZ文件夹下同名XML文件数量

Hey there! Let's solve this FTP file counting and batch download issue together. Since you mentioned needing to download multiple files matching a pattern (I assume you mean files like Lggggg.XML that start with Lgggg—since you can't have multiple exact Lgggg.XML files in the same FTP folder), here are a few practical approaches using common tools:

1. Use lftp (Command Line, Most Convenient) #

lftp is a powerful FTP client that natively supports batch operations. Here's how to count and download your files:

• Connect to the FTP server and navigate to your folder:

  lftp ftp://ftp00.abcd.net
  cd XYZ
  

• Count the number of matching files (use Lgggg*.XML to match all files starting with Lgggg):

  ls Lgggg*.XML | wc -l
  

  This command lists all matching files and pipes the output to wc -l to count the total number.
• Batch download the files directly, or use a loop if you need more control:

  # Direct batch download
  mget Lgggg*.XML
  
  # Or use a for loop (run this in one line if you prefer)
  lftp -c "open ftp://ftp00.abcd.net; cd XYZ; for file in \$(ls Lgggg*.XML); do get \$file; done"
  

2. Use curl (Command Line) #

If you prefer curl, you can first fetch the file list, then count and download:

• Get the list of matching files and count them:

  # List matching files
  curl -l ftp://ftp00.abcd.net/XYZ/Lgggg*.XML
  
  # Count the number
  curl -l ftp://ftp00.abcd.net/XYZ/Lgggg*.XML | wc -l
  

• Loop through the list to download each file:

  for file in $(curl -l ftp://ftp00.abcd.net/XYZ/Lgggg*.XML); do
    curl -O ftp://ftp00.abcd.net/XYZ/$file
  done
  

  The -O flag tells curl to save the file with its original name.

3. Use Python's ftplib (For Programmatic Control) #

If you want to script this in Python, the built-in ftplib library works perfectly:

from ftplib import FTP

# Connect to the FTP server (add username/password if required)
ftp = FTP('ftp00.abcd.net')
ftp.login()  # Use ftp.login('your_username', 'your_password') if authentication is needed

# Navigate to the XYZ folder
ftp.cwd('XYZ')

# Get all files matching your pattern
matching_files = ftp.nlst('Lgggg*.XML')

# Print the count
print(f"Found {len(matching_files)} files matching the pattern")

# Download each file
for filename in matching_files:
    with open(filename, 'wb') as local_file:
        ftp.retrbinary(f'RETR {filename}', local_file.write)
    print(f"Downloaded: {filename}")

# Close the connection
ftp.quit()

Quick Note: #

If you actually meant exact Lgggg.XML files (not a pattern), keep in mind that most FTP servers don't allow duplicate filenames in the same directory—so you might have files with slight variations (like case differences, extra characters, or different extensions). Adjust the wildcard pattern (e.g., *Lgggg*.XML for files containing Lgggg) to match your actual file names.

内容的提问来源于stack exchange，提问作者ZMAX