给定一个可能的完整文件路径,我将以C :\dir\otherDir\possiblefile 为例
C:\dir\otherDir\possiblefile文件
或 C:\dir\otherDir目录
存在。我不想创建文件夹,但如果文件不存在,我想创建它。该文件可能有扩展名,也可能没有。我想完成这样的事情:

我想出了一个解决方案,但在我看来,这有点矫枉过正。应该有一个简单的方法来做到这一点。
这是我的代码:
// Let's example with C:\dir\otherDir\possiblefile
private bool CheckFile(string filename)
{
    // 1) check if file exists
    if (File.Exists(filename))
    {
        // C:\dir\otherDir\possiblefile -> ok
        return true;
    }
    // 2) since the file may not have an extension, check for a directory
    if (Directory.Exists(filename))
    {
        // possiblefile is a directory, not a file!
        //throw new Exception("A file was expected but a directory was found");
        return false;
    }
    // 3) Go "up" in file tree
    // C:\dir\otherDir
    int separatorIndex = filename.LastIndexOf(Path.DirectorySeparatorChar);
    filename = filename.Substring(0, separatorIndex);
    // 4) Check if parent directory exists
    if (Directory.Exists(filename))
    {
        // C:\dir\otherDir\ exists -> ok
        return true;
    }
    // C:\dir\otherDir not found
    //throw new Exception("Neither file not directory were found");
    return false;
}
有什么建议么?