How Can I Safely Process Files in a Directory Structure While Ignoring Access Denied Exceptions in C#?

Use Directory.getFiles () to traverse the directory safely

When using the C# traversal directory, due to the protected folder, access is usually rejected. In order to prevent these abnormal interrupt programs, let's explore how to ignore the irreplaceable directory elegantly and continue to process the accessable files.

Challenge

The standard method of using Directory.getFiles () will suddenly throw abnormality when encountering an unacceptable folder, thereby stopping any further processing.

Recursive solution

Rather than dependence on the ALLDIRECTORIES parameter, it is better to manually achieve recursion. This involves a iteration of a directory, trying to access its files and recursively exploring any subdirectory.

Explore the directory structure with this code, ignore the irreplaceable folder and continue to process the accessable files. You can customize the CATCH block to swallow abnormality or perform custom processing, such as recording it. The improved code contains a

<code class="language-csharp">using System;
using System.IO;

public static class Program
{
    public static void Main()
    {
        string path = ""; // 获取目录路径
        ProcessAllFiles(path, ProcessFile);
    }

    private static void ProcessFile(string path) { /* 在此处添加文件处理代码。 */ }

    private static void ProcessAllFiles(string folder, Action<string> fileAction)
    {
        try
        {
            foreach (string file in Directory.GetFiles(folder))
            {
                fileAction(file);
            }

            foreach (string subDir in Directory.GetDirectories(folder))
            {
                ProcessAllFiles(subDir, fileAction);
            }
        }
        catch (Exception ex)
        {
            // 处理或忽略异常（例如，将其记录下来以便日后查看）。  考虑记录异常类型和路径信息。
            Console.WriteLine($"Error processing directory '{folder}': {ex.Message}");
        }
    }
}</code>

block to handle any possible abnormalities, and print an error message, including an exception message and a folder path.

try-catch Conclusion

By achieving custom recursive, we can ignore the files of the access to the rejection abnormality and continue to access the files in the directory structure. Even if the protected or unable to access folders, this allows more robust and user -friendly file processing.

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