如何在程序文件夹c＃中查找特定文件的文件路径 [英] how to find a file path of a particular file in program folder c#

问题描述

我需要找到特定文件的路径。我知道文件的文件名和扩展名。但我不知道文件所在的位置。该文件将位于 C：\Program Files 的任何子目录中。所以我需要在程序文件夹中搜索文件。我的文件名是 CASdb.accdb

I have a requirement to find the path of a particular file. I know the file name and extension of the file. but i don't know where the file resides. The file will in any of the sub directories of C:\Program Files. so i need to search inside the program folder for the file. My file name is CASdb.accdb

推荐答案

只是探索

Just explore

string[] filePaths = System.IO. Directory.GetFiles("C:\Program Files","CASdb.accdb",SearchOption.AllDirectories) ;

使用'EnumerateFiles的解决方案，可能比使用'GetFiles更快：

A solution using 'EnumerateFiles, which may be faster than using 'GetFiles:

private bool findFilePath(string directoryPath, string fileName, out string result)
{
    string fullPath = Path.Combine(directoryPath, fileName);

    if (File.Exists(fullPath))
    {
        result = fullPath;
        return true;
    }

    // note this initialization required here
    // since 'result has been passed by reference using 'out
    result = string.Empty;

    try
    {
        result = Directory.EnumerateFiles(directoryPath, fileName, SearchOption.AllDirectories).First();
    }
    catch
    {
        // something went wrong ...
        return false;
    }

    // valid result
    return true;

调用此方法的示例：

// note that 'result is passed by reference
string result;

if (findFilePath(@"C:\Program Files", @"CASdb.accdb", out result))
{
    // result contains path to file
}

讨论：



首先，请注意有一些目录在引导驱动程序'Program Files文件夹，如'WindowsApps'，除非您拥有TrustedInstaller的访问权限，否则无法使用'GetFiles或'EnumerateFiles访问它。例如，使用Win 8，请参阅：[ ^ ]。尝试访问具有TrustedInstaller状态的目录将导致应用程序中断错误。



如何在FileExplorer中创建TrustedInstaller访问（手动）：[ ^ ]。



获取C＃代码中的这种权限很复杂：从这里开始定向：[ ^ ]，然后看：[ ^ ]，[ ^ ]。



修改TrustedInstaller状态目录访问可能是出于安全原因你不应该做的事情 ......除非你是一个合法的SysAdmin。如果你需要接受这项研究，请准备好进行一些认真的学习！

Discussion:

First, note that there are some Directories in the boot-drive 'Program Files folder, like 'WindowsApps, that you cannot access with either 'GetFiles or 'EnumerateFiles unless you have the access right of "TrustedInstaller." For example with Win 8 see:[^]. Trying to access directories with TrustedInstaller status will result in an application breaking error.

For how to create "TrustedInstaller" access (manually) in the FileExplorer: [^].

Getting this kind of permission in C# code is complex: start here to get oriented: [^], and then see: [^], [^].

Modifying TrustedInstaller status directory access is probably something you should not be doing for security reasons ... unless you are a legitimate SysAdmin. Get ready for some serious study if you need to take this on !

这是另一种在找到文件时停止搜索的方法。

This is another approach that will stop searching when the file is found.

string foundFilePath = FindFile(@"C:\Program Files", "CASdb.accdb");

请注意，此方法是递归的

Note that this method is recursive

private string FindFile(string directory, string fileName)
{
    string foundFileName = null;
    try
    {
        foundFileName = Directory.GetFiles(directory, fileName).FirstOrDefault();
        if (String.IsNullOrEmpty(foundFileName))
        {
            foreach (string dir in Directory.GetDirectories(directory))
            {
                foundFileName = FindFile(dir, fileName);
                if (!String.IsNullOrEmpty(foundFileName))
                    break;
            }
        }
    }
    catch { } // The most likely exception is UnauthorizedAccessException
              // and there is not much to do about that

    return foundFileName;
}

我没有做任何基准测试，看看这种方式是否更快。

I have not done any bench marking to see if this way is faster or not.

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