做項(xiàng)目時(shí)發(fā)現(xiàn)Path.Combine方法只能支持傻瓜式的目錄拼接

輸出結(jié)果為：

發(fā)現(xiàn)并沒(méi)有按照想像的分辨出相對(duì)路徑和絕對(duì)路徑，所以只好用正則匹配了相對(duì)路徑進(jìn)行重新拼接，以下方法只支持絕對(duì)路徑+相對(duì)路徑的方式

//絕對(duì)路徑
string absolutePath = @"C:\Program Files\Internet Explorer";
//相對(duì)路徑
string relativePath = @"..\TestPath\";
//預(yù)計(jì)拼接結(jié)果
string splicingResult = string.Empty;
Console.WriteLine(string.Format("Path.Combine(\"{0}\",\"{1}\")=\"{2}\"", absolutePath, relativePath, Path.Combine(absolutePath, relativePath)));
if (!Path.IsPathRooted(relativePath))
{
    //匹配相對(duì)路徑，匹配需要向上推的目錄層數(shù)
    Regex regex = new Regex(@"^\\|([..]+)");
    int backUp = regex.Matches(relativePath).Count;
    List<string> pathes = absolutePath.Split("\\".ToCharArray()).ToList();
    pathes.RemoveRange(pathes.Count - backUp, backUp);
    //匹配文件名，匹配需要附加的目錄層數(shù)
    regex = new Regex(@"^\\|([a-zA-Z0-9]+)");
    MatchCollection matches = regex.Matches(relativePath);
    foreach (Match match in matches)
    {
        pathes.Add(match.Value);
    }
    //驅(qū)動(dòng)器地址取絕對(duì)路徑中的驅(qū)動(dòng)器地址
    pathes[0] = Path.GetPathRoot(absolutePath);
    foreach (string p in pathes)
    {
        splicingResult = Path.Combine(splicingResult, p);
    }
}
Console.WriteLine(string.Format("Absolute Path={0}",absolutePath));
Console.WriteLine(string.Format("Relative Path={0}", relativePath));
Console.WriteLine(string.Format("Path.Combine(\"{0}\",\"{1}\")=\"{2}\"", absolutePath, relativePath, splicingResult));
Console.ReadLine();

輸出結(jié)果：

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