C#获取文件夹下的所有文件

1、获得当前运行程序的路径
string rootPath = Directory.GetCurrentDirectory();

2、获得该文件夹下的文件，返回类型为FileInfo
string path=@"X:\XXX\XX";
DirectoryInfo root = new DirectoryInfo(path);
FileInfo[] files=root.GetFiles();

3、获得该文件夹下的子目录，返回类型为DirectoryInfo
string path=@"X:\XXX\XX";
DirectoryInfo root = new DirectoryInfo(path);
DirctoryInfo[] dics=root.GetDirectories();

4、获得文件夹名
string path=@"X:\XXX\XX";
DirectoryInfo root = new DirectoryInfo(path);
string dicName=root.Name;

5、获得文件夹完整的路径名
string path=@"X:\XXX\XX";
DirectoryInfo root = new DirectoryInfo(path);
string dicName=root.FullName;

6、获取文件的Name和FullName
string path=@"X:\XXX\XX";
DirectoryInfo root = new DirectoryInfo(path);
foreach (FileInfo f in root.GetFiles())
{
    string name=f.Name;
    string fullName=f.FullName;
} 

7、只获取目录下一级的文件夹与文件
String path = @"X:\xxx\xxx";

//第一种方法
string[] files = Directory.GetFiles(path, "*.txt");
foreach (string file in files)
{
   Console.WriteLine(file);
}
//第二种方法
DirectoryInfo folder = new DirectoryInfo(path);
foreach (FileInfo file in folder.GetFiles("*.txt"))
{
     Console.WriteLine(file.FullName);
}

8、递归地输出当前运行程序所在的磁盘下的所有文件名和子目录名
static void Main(string[] args)
{
    //获取当前程序所在的文件路径
    String rootPath = Directory.GetCurrentDirectory();
    string parentPath = Directory.GetParent(rootPath).FullName;//上级目录
    string topPath = Directory.GetParent(parentPath).FullName;//上上级目录
    StreamWriter sw = null;
    try
    {
        //创建输出流，将得到文件名子目录名保存到txt中
        sw = new StreamWriter(new FileStream("fileList.txt", FileMode.Append));
        sw.WriteLine("根目录：" + topPath);
        getDirectory(sw, topPath, 2);
    }
    catch (IOException e)
    {
        Console.WriteLine(e.Message);
    }
    finally
    {
        if (sw != null)
        {
            sw.Close();
            Console.WriteLine("完成");
        }
    }

}

/// <summary>
/// 获得指定路径下所有文件名
/// </summary>
/// <param name="sw">文件写入流</param>
/// <param name="path">文件写入流</param>
/// <param name="indent">输出时的缩进量</param>
public static void getFileName(StreamWriter sw, string path, int indent)
{
    DirectoryInfo root = new DirectoryInfo(path);
    foreach (FileInfo f in root.GetFiles())
    {
        for (int i = 0; i < indent; i++)
        {
            sw.Write("  ");
        }
        sw.WriteLine(f.Name);
    }
}

/// <summary>
/// 获得指定路径下所有子目录名
/// </summary>
/// <param name="sw">文件写入流</param>
/// <param name="path">文件夹路径</param>
/// <param name="indent">输出时的缩进量</param>
public static void getDirectory(StreamWriter sw, string path, int indent)
{
    getFileName(sw, path, indent);
    DirectoryInfo root = new DirectoryInfo(path);
    foreach (DirectoryInfo d in root.GetDirectories())
    {
        for (int i = 0; i < indent; i++)
        {
            sw.Write("  ");
        }
        sw.WriteLine("文件夹：" + d.Name);
        getDirectory(sw, d.FullName, indent + 2);
        sw.WriteLine();
    }
}

　　

　　

转载于：https://mp.weixin.qq.com/s/n1LtDr7uMxNJmtko4NiJJg