c# 递归遍历选择文件夹下所有文件并计算该类型大小

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace FileRetrieval
{
public static class FileUtils
{
public static void Director(string dir)
{
DirectoryInfo d = new DirectoryInfo(dir);
FileSystemInfo[] fsinfos = d.GetFileSystemInfos();
foreach (FileSystemInfo fsinfo in fsinfos)
{
if (fsinfo is DirectoryInfo) //判断是否为文件夹
{
Director(fsinfo.FullName);//递归调用
}
else
{
Console.WriteLine(fsinfo.FullName);//输出文件的全部路径
}
}
}

// 测试一下
public static void TestGetCurrentFileList(string dataPath, Dictionary<string, string> configs)
{
StringBuilder stringBuilder = new StringBuilder();
for (var i = 0; i < configs.Count; i++)
{
var item = configs.ElementAt(i);
var con1 = item.Key;
var con2 = item.Value;
var conArray = con2.Split(',');

stringBuilder.AppendLine(string.Format("[{0}]", con1));
foreach (var a in conArray)
{
var fs = GetFileList(dataPath, names: a);
long size = 0;
foreach (var f in fs)
{
size += GetFileLength(f.FullName);
//stringBuilder.AppendLine($"文件名:{f.FullName},大小:{ GetFileSize(GetFileLength(f.FullName))}");
}

stringBuilder.AppendLine($"(扩展名:{a},数量:{fs.Count},大小:{GetFileSize(size)})");
}
}
WriteData(stringBuilder.ToString());
}

private static long GetFileLength(string filePath)
{
FileInfo t = new FileInfo(filePath);//获取文件
var size = t.Length;//这样我们就获取到了文件的大小
return size;
}

/// <summary>
/// 格式化文件大小
/// </summary>
/// <param name="filesize">文件传入大小</param>
/// <returns></returns>
private static string GetFileSize(long filesize)
{
try
{
if (filesize < 0)
{
return "0";
}
else if (filesize >= 1024 * 1024 * 1024) //文件大小大于或等于1024MB
{
return string.Format("{0:0.00} GB", (double)filesize / (1024 * 1024 * 1024));
}
else if (filesize >= 1024 * 1024) //文件大小大于或等于1024KB
{
return string.Format("{0:0.00} MB", (double)filesize / (1024 * 1024));
}
else if (filesize >= 1024) //文件大小大于等于1024bytes
{
return string.Format("{0:0.00} KB", (double)filesize / 1024);
}
else
{
return string.Format("{0:0.00} bytes", filesize);
}
}
catch (Exception ex)
{

throw ex;
}

}

private static void WriteData(string str)
{
string path = System.AppDomain.CurrentDomain.BaseDirectory + "Info.txt";

using (StreamWriter sw = new StreamWriter(path, false, Encoding.UTF8))
{
sw.Write(str);
}
}


/// <summary>
/// 递归遍历文件夹获取文件
/// </summary>
/// <param name="path"></param>
public static List<FileInfo> GetFileList(string path, bool isRecursion = true, int pathDeep = 20, List<FileInfo> fileInfos = null, params string[] names)
{
if (fileInfos == null)
{
fileInfos = new List<FileInfo>();
}
if (pathDeep < 0)
{
return fileInfos;
}
DirectoryInfo theFolder = new DirectoryInfo(path);
//获取文件夹下文件
FileInfo[] files = theFolder.GetFiles();
foreach (var file in files)
{
foreach (var fn in names)
{
if (string.IsNullOrEmpty(fn))
{
continue;
}
if (file.Name.ToLower() == fn.ToLower())
{
fileInfos.Add(file);
}
}

}
if (isRecursion)
{
// 如果是递归，遍历该文件夹下的文件夹
var dirs = theFolder.GetDirectories();
if (!dirs.Any())
{
return fileInfos;
}
foreach (var dir in dirs)
{
GetFileList(dir.FullName, isRecursion, --pathDeep, fileInfos, names);
}
}
return fileInfos;
}

}

}