确定文件是否存在使用C＃和解决UNC路径 [英] Determining if file exists using c# and resolving UNC path

问题描述

我试图写一个函数来确定文件是否存在。这两种方法证明返回不一致的结果（FILEEXISTS（）似乎提供准确的结果，相比isFileFound（）返回误报 - 我本来期望试图创建实例时除外）。

I am trying to write a function to determine if a file exists. The two methods prove to return inconsistent results (fileExists() seems to provide accurate results, compared to isFileFound(), that returns false positives - i would have expected an exception when trying to create the instance).

protected bool isFileFound(string path, string fileName)
    {
        System.IO.FileInfo fi = null;

        bool found = false;
        try
        {
            fi = new System.IO.FileInfo(path + fileName);
            found = true;
        }
        catch (Exception e)
        {
            baselogger.Fatal(e.Message + " " + e.StackTrace + " \n" + path + fileName);
        }

        return found;
    }

    protected bool fileExists(string path, string pattern)
    {
        bool success = false;

        try
        {
            success = File.Exists(path + pattern);
        }
        catch (Exception e)
        {
            baselogger.Warn(e.Message + " " + e.StackTrace + " " + e.Source);
        }

        return success;
    }

似乎都不是能够解决以下语法的UNC路径： \\\\ abcserver \\ C $ \\ xyzfolder \\ foo.bar 的

Neither seems to be able to resolve a UNC path of the following syntax: \\abcserver\c$\xyzfolder\foo.bar

任何想法，为什么UNC路径是失败了这些方法将大大AP preciated。

Any idea why the unc path is failing for these methods would be greatly appreciated.

推荐答案

您可以为不存在的文件中创建一个FileInfo。不过，你可以检查FileInfo.Exists属性来确定文件是否存在，例如：

You can create a FileInfo for an non-existing file. But then you can check the FileInfo.Exists property to determine whether the file exists, e.g:

FileInfo fi = new FileInfo(somePath);
bool exists = fi.Exists;

更新：
在很短的测试，这也工作了UNC路径，例如像这样的：

Update: In a short test this also worked for UNC paths, e.g. like this:

FileInfo fi = new FileInfo(@"\\server\share\file.txt");
bool exists = fi.Exists;

您确定该帐户（下运行应用程序）的访问共享。我认为，（默认）的管理权限需要访问该共享的C $。

Are you sure that the account (under which your application is running) has access to the share. I think that (by default) administrative rights are required to access the share "c$".

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