使用实例：
private string urlPath = "";
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
urlPath = Server.MapPath("~/file/");
fileInfo();
}
}
/// <summary>
/// 文件操作
/// </summary>
private void fileInfo()
{
/*Response.Write("文件后缀：" + FileDownHelper.FileNameExtension("file/test.txt") + "<br />");
Response.Write("文件路径：" + FileDownHelper.MapPathFile("~/file/") + "<br />");
#region 下载文件
FileDownHelper.DownLoadold("file/test.txt");
FileDownHelper.DownLoad("file/eclipse.zip");
FileDownHelper.ResponseFile(Request, Response, "eclipse_d.zip", urlPath + "eclipse.zip", 10000); //10000可以100K
#endregion*/
#region 文件操作
if (FileHelper.IsExistFile(urlPath + "test.txt"))
{
Response.Write("文件test.txt已经存在<br />");
}
else
{
Response.Write("文件test.txt不存在<br />");
}
//FileHelper.ExistsFile(urlPath + "test.txt"); //文件不存在则创建
Response.Write("文件名：" + FileHelper.GetFileName("file/test.txt") + "<br />");
//FileHelper.CreateFile(urlPath + "test.txt");
string mS = "MD5加密字符串：4QrcOUm6Wau+VuBX8g+IPg==\r\nMD5_16加密字符串：49BA59ABBE56E057\r\nMD5_32加密字符串：e10adc3949ba59abbe56e057f20f883e\r\nMD5（哈希）加密字符串：4QrcOUm6Wau+VuBX8g+IPg==\r\nDES加密字符串：BFE89F1A08F228B4\r\nDES解密字符串：123456\r\nRSA加密字符串：ILWFODZ2M3t1yXHoYxI5g2JSFR7mHIC8XkjBldKpClX4Fd5Y4l1SBEdXSpMyLXNw4xcedJZPf1EWosPjnUPb7o2h+4uFAEYvKJOGC6RaSre7eYVfGHKFJ76tvCZ+7qM26BEvhVOTpLKqn54URwg5cJg/YA9ANiGKbodBX2JnE7k=\r\nRSA解密字符串：123456\r\nAES加密字符串：VAsFoVM6j7jx1z3VKwZ0OA==\r\nAES解密字符串：123456\r\nDES（哈希）加密字符串：71FAFEBAAC484451\r\nDES（哈希）解密字符串：123456\r\nBase64加密字符串：MTIzNDU2\r\nBase64解密字符串：123456";
//FileHelper.CreateFile(urlPath + "test.txt", mS);
//byte[] b = Encoding.Default.GetBytes(mS + "\r\n测试");
//FileHelper.CreateFile(urlPath + "test.txt", b);
FileHelper.WriteText(urlPath + "test.txt", mS + "\r\n测试" + "\r\n测试", Encoding.Default);
FileHelper.AppendText(urlPath + "test.txt", "\r\n" + mS, Encoding.Default);
//FileHelper.Copy(urlPath + "test.txt", urlPath + "test/test.txt");
//FileHelper.Copy(urlPath + "test.txt", urlPath + "test/test1.txt");
//FileHelper.Move(urlPath + "test.txt", urlPath + "test/");
//FileHelper.DeleteFile(urlPath + "test/" + "test.txt");
//FileHelper.MoveFile(urlPath + "test.txt", urlPath + "test/test1.txt");
//FileHelper.CopyFile(urlPath + "test.txt", urlPath + "test/");
//FileHelper.ClearFile(urlPath + "test.txt");
Response.Write("文件行数：" + FileHelper.GetLineCount(urlPath + "test.txt") + "<br />");
Response.Write("文件大小：" + FileHelper.GetFileSize(urlPath + "test.txt", false) + "<br />");
Response.Write("文件名称：" + FileHelper.GetFileNameNoExtension(urlPath + "test.txt") + "<br />");
Response.Write("文件后缀：" + FileHelper.GetExtension(urlPath + "test.txt") + "<br />");
//FileHelper.CopyFolder(urlPath + "test", urlPath + "test1");
//FileHelper.DeleteFolderFiles(urlPath + "test", urlPath + "test1");
if (FileHelper.IsEmptyDirectory(urlPath + "test1/"))
{
Response.Write("文件夹test1是空目录<br />");
}
else
{
Response.Write("文件夹test1是非空目录<br />");
}
if (FileHelper.IsExistDirectory(urlPath + "test1/"))
{
Response.Write("文件夹test1已经存在<br />");
}
else
{
Response.Write("文件夹test1不存在<br />");
}
if (FileHelper.Contains(urlPath + "test/", "test1.txt"))
{
Response.Write("文件夹test下存在test1.txt文件<br />");
}
else
{
Response.Write("文件夹test下不存在test1.txt文件<br />");
}
if (FileHelper.Contains(urlPath + "test/", "test1.txt", true))
{
Response.Write("文件夹test下能找到test1.txt文件<br />");
}
else
{
Response.Write("文件夹test下不能找到test1.txt文件<br />");
}
FileHelper.CreateDir(urlPath + "test2/");
FileHelper.CreateDirectory(urlPath + "test2/test3/");
FileHelper.CreateDirectory(urlPath + "test3/");
FileHelper.DeleteDir(urlPath + "test3/");
//FileHelper.ClearDirectory(urlPath + "test2/");
//FileHelper.DeleteDirectory(urlPath + "test2/");
string[] fD = FileHelper.GetDirectories(urlPath + "test/");
string[] fF = FileHelper.GetFileNames(urlPath + "test/");
string[] fAF = FileHelper.GetFileNames(urlPath, "*.txt", true);
Stream s = FileHelper.FileToStream(urlPath + "test.txt");
byte[] b = FileHelper.FileToBytes(urlPath + "test.txt");
FileHelper.StreamToFile(s, urlPath + "test3.txt");
byte[] bb = FileHelper.StreamToBytes(s);
Stream ss = FileHelper.BytesToStream(b);
FileHelper.UpLoadFile(b, urlPath + "test4.txt");
VerCodeHelper v = new VerCodeHelper();
string sBase = FileHelper.ImgToBase64String("zhengdecai");
string iBase = FileHelper.ImgToBase64String(v.Image);
FileHelper.Base64ToImage(iBase, urlPath + "1.png");
byte[] bImage = FileHelper.ImageToByte(urlPath + "1.png");
byte[] bImg = FileHelper.ImgToByte(v.Image);
System.Drawing.Image img = FileHelper.ByteToImg(bImg);
Response.Write("文件夹：" + FileHelper.GetDictSize(urlPath) + "<br />");
string bBin = FileHelper.FileToBinary(urlPath + "test4.txt");
FileHelper.CreateDir(urlPath + "File/");
FileHelper.BinaryToFile(urlPath + "File/test4.txt", bBin);
#endregion
}类库信息：
/// <summary>
/// 文件下载类
/// </summary>
public class FileDownHelper
{
#region 基础方法
/// <summary>
/// 读取虚拟目录文件的文件后缀
/// </summary>
/// <param name="fileName">文件虚拟路径</param>
/// <returns></returns>
public static string FileNameExtension(string fileName)
{
return Path.GetExtension(MapPathFile(fileName));
}
/// <summary>
/// 获取虚拟目录的物理地址
/// </summary>
/// <param name="fileName">文件虚拟路径</param>
/// <returns></returns>
public static string MapPathFile(string fileName)
{
return HttpContext.Current.Server.MapPath(fileName);
}
#endregion
#region 下载文件操作
/// <summary>
/// 普通下载
/// </summary>
/// <param name="fileName">文件虚拟路径</param>
public static void DownLoadold(string fileName)
{
string destFileName = MapPathFile(fileName);
if (File.Exists(destFileName))
{
FileInfo fi = new FileInfo(destFileName);
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ClearHeaders();
HttpContext.Current.Response.Buffer = false;
HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(Path.GetFileName(destFileName), System.Text.Encoding.UTF8));
HttpContext.Current.Response.AppendHeader("Content-Length", fi.Length.ToString());
HttpContext.Current.Response.ContentType = "application/octet-stream";
HttpContext.Current.Response.WriteFile(destFileName);
HttpContext.Current.Response.Flush();
HttpContext.Current.Response.End();
}
}
/// <summary>
/// 分块下载
/// </summary>
/// <param name="fileName">文件虚拟路径</param>
public static void DownLoad(string fileName)
{
string filePath = MapPathFile(fileName);
long chunkSize = 204800; //指定块大小
byte[] buffer = new byte[chunkSize]; //建立一个200K的缓冲区
long dataToRead = 0; //已读的字节数
FileStream stream = null;
try
{
//打开文件
stream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read);
dataToRead = stream.Length;
//添加Http头
HttpContext.Current.Response.ContentType = "application/octet-stream";
HttpContext.Current.Response.AddHeader("Content-Disposition", "attachement;filename=" + HttpUtility.UrlEncode(Path.GetFileName(filePath)));
HttpContext.Current.Response.AddHeader("Content-Length", dataToRead.ToString());
while (dataToRead > 0)
{
if (HttpContext.Current.Response.IsClientConnected)
{
int length = stream.Read(buffer, 0, Convert.ToInt32(chunkSize));
HttpContext.Current.Response.OutputStream.Write(buffer, 0, length);
HttpContext.Current.Response.Flush();
HttpContext.Current.Response.Clear();
dataToRead -= length;
}
else
{
dataToRead = -1; //防止client失去连接
}
}
}
catch (Exception ex)
{
HttpContext.Current.Response.Write("Error:" + ex.Message);
}
finally
{
if (stream != null) stream.Close();
HttpContext.Current.Response.Close();
}
}
/// <summary>
/// 输出硬盘文件，提供下载 支持大文件、续传、速度限制、资源占用小
/// </summary>
/// <param name="request">Page.Request对象</param>
/// <param name="response">Page.Response对象</param>
/// <param name="fileName">下载文件名</param>
/// <param name="filePath">带文件名下载路径</param>
/// <param name="speed">每秒允许下载的字节数</param>
/// <returns>返回是否成功</returns>
//---------------------------------------------------------------------
//调用：
// string FullPath=Server.MapPath("count.txt");
// ResponseFile(this.Request,this.Response,"count.txt",FullPath,100);
//---------------------------------------------------------------------
public static bool ResponseFile(HttpRequest request, HttpResponse response, string fileName, string filePath, long speed)
{
try
{
FileStream myFile = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
BinaryReader br = new BinaryReader(myFile);
try
{
response.AddHeader("Accept-Ranges", "bytes");
response.Buffer = false;
long fileLength = myFile.Length;
long startBytes = 0;
int pack = 10240; //10K bytes
int sleep = (int)Math.Floor((double)(1000 * pack / speed)) + 1;
if (request.Headers["Range"] != null)
{
response.StatusCode = 206;
string[] range = request.Headers["Range"].Split(new char[] { '=', '-' });
startBytes = Convert.ToInt64(range[1]);
}
response.AddHeader("Content-Length", (fileLength - startBytes).ToString());
if (startBytes != 0)
{
response.AddHeader("Content-Range", string.Format(" bytes {0}-{1}/{2}", startBytes, fileLength - 1, fileLength));
}
response.AddHeader("Connection", "Keep-Alive");
response.ContentType = "application/octet-stream";
response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));
br.BaseStream.Seek(startBytes, SeekOrigin.Begin);
int maxCount = (int)Math.Floor((double)((fileLength - startBytes) / pack)) + 1;
for (int i = 0; i < maxCount; i++)
{
if (response.IsClientConnected)
{
response.BinaryWrite(br.ReadBytes(pack));
Thread.Sleep(sleep);
}
else
{
i = maxCount;
}
}
}
catch
{
return false;
}
finally
{
br.Close();
myFile.Close();
}
}
catch
{
return false;
}
return true;
}
#endregion
}
/// <summary>
/// 文件操作类
/// </summary>
public class FileHelper
{
#region 文件操作
#region 文件检测操作
/// <summary>
/// 检测指定文件是否存在,如果存在则返回true。
/// </summary>
/// <param name="filePath">文件的绝对路径</param>
public static bool IsExistFile(string filePath)
{
return File.Exists(filePath);
}
/// <summary>
/// 检查文件,如果文件不存在则创建
/// </summary>
/// <param name="FilePath">路径,包括文件名</param>
public static void ExistsFile(string FilePath)
{
//if(!File.Exists(FilePath))
//File.Create(FilePath);
//以上写法会报错,详细解释请看下文.........
if (!File.Exists(FilePath))
{
FileStream fs = File.Create(FilePath);
fs.Close();
}
}
/// <summary>
/// 从文件的绝对路径中获取文件名( 包含扩展名 )
/// </summary>
/// <param name="filePath">文件的绝对路径</param>
public static string GetFileName(string filePath)
{
//获取文件的名称
FileInfo fi = new FileInfo(filePath);
return fi.Name;
}
#endregion
#region 文件创建操作
/// <summary>
/// 创建文件
/// </summary>
/// <param name="dir">带后缀的文件名</param>
/// <param name="pagestr">文件内容</param>
public static void CreateFile(string dir, string pagestr)
{
dir = dir.Replace("/", "\\");
if (dir.IndexOf("\\") > -1)
CreateDir(dir.Substring(0, dir.LastIndexOf("\\")));
StreamWriter sw = new StreamWriter(dir, false, System.Text.Encoding.GetEncoding("GB2312"));
sw.Write(pagestr);
sw.Close();
}
/// <summary>
/// 创建一个文件。
/// </summary>
/// <param name="filePath">文件的绝对路径</param>
public static void CreateFile(string filePath)
{
try
{
//如果文件不存在则创建该文件
if (!IsExistFile(filePath))
{
//创建一个FileInfo对象
FileInfo file = new FileInfo(filePath);
//创建文件
FileStream fs = file.Create();
//关闭文件流
fs.Close();
}
}
catch (Exception ex)
{
throw ex;
}
}
/// <summary>
/// 创建一个文件,并将字节流写入文件。
/// </summary>
/// <param name="filePath">文件的绝对路径</param>
/// <param name="buffer">二进制流数据</param>
public static void CreateFile(string filePath, byte[] buffer)
{
try
{
//如果文件不存在则创建该文件
if (!IsExistFile(filePath))
{
//创建一个FileInfo对象
FileInfo file = new FileInfo(filePath);
//创建文件
FileStream fs = file.Create();
//写入二进制流
fs.Write(buffer, 0, buffer.Length);
//关闭文件流
fs.Close();
}
}
catch (Exception ex)
{
throw ex;
}
}
#endregion
#region 文件写入操作
/// <summary>
/// 向文本文件中写入内容
/// </summary>
/// <param name="filePath">文件的绝对路径</param>
/// <param name="text">写入的内容</param>
/// <param name="encoding">编码</param>
public static void WriteText(string filePath, string text, Encoding encoding)
{
//向文件写入内容
File.WriteAllText(filePath, text, encoding);
}
/// <summary>
/// 向文本文件的尾部追加内容
/// </summary>
/// <param name="filePath">文件的绝对路径</param>
/// <param name="content">写入的内容</param>
public static void AppendText(string filePath, string content, Encoding encoding)
{
File.AppendAllText(filePath, content, encoding);
}
#endregion
#region 文件删除、移动、复制操作
/// <summary>
/// 将源文件的内容复制到目标文件中
/// </summary>
/// <param name="sourceFilePath">源文件的绝对路径</param>
/// <param name="destFilePath">目标文件的绝对路径</param>
public static void Copy(string sourceFilePath, string destFilePath)
{
File.Copy(sourceFilePath, destFilePath, true);
}
/// <summary>
/// 将文件移动到指定目录
/// </summary>
/// <param name="sourceFilePath">需要移动的源文件的绝对路径</param>
/// <param name="descDirectoryPath">移动到的目录的绝对路径</param>
public static void Move(string sourceFilePath, string descDirectoryPath)
{
//获取源文件的名称
string sourceFileName = GetFileName(sourceFilePath);
if (IsExistDirectory(descDirectoryPath))
{
//如果目标中存在同名文件,则删除
if (IsExistFile(descDirectoryPath + "\\" + sourceFileName))
{
DeleteFile(descDirectoryPath + "\\" + sourceFileName);
}
//将文件移动到指定目录
File.Move(sourceFilePath, descDirectoryPath + "\\" + sourceFileName);
}
}
/// <summary>
/// 删除文件
/// </summary>
/// <param name="file">要删除的文件路径和名称</param>
public static void DeleteFile(string file)
{
if (File.Exists(file))
File.Delete(file);
}
/// <summary>
/// 移动文件(剪贴--粘贴)，移动后重命名，已经存在就会出错
/// </summary>
/// <param name="dir1">要移动的文件的路径及全名(包括后缀)</param>
/// <param name="dir2">文件移动到新的位置,并指定新的文件名</param>
public static void MoveFile(string dir1, string dir2)
{
dir1 = dir1.Replace("/", "\\");
dir2 = dir2.Replace("/", "\\");
if (File.Exists(dir1))
File.Move(dir1, dir2);
}
/// <summary>
/// 复制文件
/// </summary>
/// <param name="dir1">要复制的文件的路径已经全名(包括后缀)</param>
/// <param name="dir2">目标位置,并指定新的文件名</param>
public static void CopyFile(string dir1, string dir2)
{
dir1 = dir1.Replace("/", "\\");
dir2 = dir2.Replace("/", "\\");
if (File.Exists(dir1))
{
File.Copy(dir1, dir2, true);
}
}
/// <summary>
/// 备份文件
/// </summary>
/// <param name="sourceFileName">源文件名</param>
/// <param name="destFileName">目标文件名</param>
/// <param name="overwrite">当目标文件存在时是否覆盖</param>
/// <returns>操作是否成功</returns>
public static bool CopyFile(string sourceFileName, string destFileName, bool overwrite)
{
if (!File.Exists(sourceFileName))
{
throw new FileNotFoundException(sourceFileName + "文件不存在！");
}
if (!overwrite && File.Exists(destFileName))
{
return false;
}
try
{
File.Copy(sourceFileName, destFileName, true);
return true;
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// 清空文件内容
/// </summary>
/// <param name="filePath">文件的绝对路径</param>
public static void ClearFile(string filePath)
{
//删除文件
File.Delete(filePath);
//重新创建该文件
CreateFile(filePath);
}
#endregion
#region 文件读取操作
/// <summary>
/// 根据时间得到文件名HHmmssff
/// </summary>
/// <returns></returns>
public static string GetDateFile()
{
return DateTime.Now.ToString("HHmmssff");
}
/// <summary>
/// 获取文本文件的行数
/// </summary>
/// <param name="filePath">文件的绝对路径</param>
public static int GetLineCount(string filePath)
{
//将文本文件的各行读到一个字符串数组中
string[] rows = File.ReadAllLines(filePath);
//返回行数
return rows.Length;
}
/// <summary>
/// 获取一个文件的长度,单位为Byte
/// </summary>
/// <param name="filePath">文件的绝对路径</param>
public static string GetFileSize(string filePath, bool isNum)
{
if (isNum)
{
//创建一个文件对象
FileInfo fi = new FileInfo(filePath);
//获取文件的大小
return fi.Length.ToString();
}
else
{
if (File.Exists(filePath) == true)
{
FileInfo fileinfo = new FileInfo(filePath);
long fl = fileinfo.Length;
if (fl > 1024 * 1024 * 1024)
{
return Convert.ToString(Math.Round((fl + 0.00) / (1024 * 1024 * 1024), 2)) + " GB";
}
else if (fl > 1024 * 1024)
{
return Convert.ToString(Math.Round((fl + 0.00) / (1024 * 1024), 2)) + " MB";
}
else
{
return Convert.ToString(Math.Round((fl + 0.00) / 1024, 2)) + " KB";
}
}
else
{
return null;
}
}
}
/// <summary>
/// 从文件的绝对路径中获取文件名( 不包含扩展名 )
/// </summary>
/// <param name="filePath">文件的绝对路径</param>
public static string GetFileNameNoExtension(string filePath)
{
//获取文件的名称
FileInfo fi = new FileInfo(filePath);
return fi.Name.Split('.')[0];
}
/// <summary>
/// 从文件的绝对路径中获取扩展名
/// </summary>
/// <param name="filePath">文件的绝对路径</param>
public static string GetExtension(string filePath)
{
//获取文件的名称
FileInfo fi = new FileInfo(filePath);
return fi.Extension;
}
#endregion
#endregion
#region 文件夹操作
#region 删除、复制文件夹
/// <summary>
/// 复制文件夹(递归)
/// </summary>
/// <param name="varFromDirectory">源文件夹路径</param>
/// <param name="varToDirectory">目标文件夹路径</param>
public static void CopyFolder(string varFromDirectory, string varToDirectory)
{
Directory.CreateDirectory(varToDirectory);
if (!Directory.Exists(varFromDirectory)) return;
string[] directories = Directory.GetDirectories(varFromDirectory);
if (directories.Length > 0)
{
foreach (string d in directories)
{
string tD = varToDirectory + d.Substring(d.LastIndexOf("\\"));
CopyFolder(d, tD);
}
}
string[] files = Directory.GetFiles(varFromDirectory);
if (files.Length > 0)
{
foreach (string s in files)
{
string tF = varToDirectory + "/" + FileHelper.GetFileName(s);
File.Copy(s, tF, true);
}
}
}
/// <summary>
/// 删除指定文件夹对应其他文件夹里的文件
/// </summary>
/// <param name="varFromDirectory">指定文件夹路径</param>
/// <param name="varToDirectory">对应其他文件夹路径</param>
public static void DeleteFolderFiles(string varFromDirectory, string varToDirectory)
{
Directory.CreateDirectory(varToDirectory);
if (!Directory.Exists(varFromDirectory)) return;
string[] directories = Directory.GetDirectories(varFromDirectory);
if (directories.Length > 0)
{
foreach (string d in directories)
{
string tD = varToDirectory + d.Substring(d.LastIndexOf("\\"));
DeleteFolderFiles(d, tD);
}
}
string[] files = Directory.GetFiles(varFromDirectory);
if (files.Length > 0)
{
foreach (string s in files)
{
string tF = varToDirectory + "/" + FileHelper.GetFileName(s);
File.Delete(tF);
}
}
}
#endregion
#endregion
#region 文件目录操作
#region 文件目录检查操作
/// <summary>
/// 检测指定目录是否为空
/// </summary>
/// <param name="directoryPath">指定目录的绝对路径</param>
public static bool IsEmptyDirectory(string directoryPath)
{
try
{
//判断是否存在文件
string[] fileNames = GetFileNames(directoryPath);
if (fileNames.Length > 0)
{
return false;
}
//判断是否存在文件夹
string[] directoryNames = GetDirectories(directoryPath);
if (directoryNames.Length > 0)
{
return false;
}
return true;
}
catch
{
return true;
}
}
/// <summary>
/// 检测指定目录是否存在
/// </summary>
/// <param name="directoryPath">目录的绝对路径</param>
/// <returns></returns>
public static bool IsExistDirectory(string directoryPath)
{
return Directory.Exists(directoryPath);
}
/// <summary>
/// 检测指定目录中是否存在指定的文件,若要搜索子目录请使用重载方法.
/// </summary>
/// <param name="directoryPath">指定目录的绝对路径</param>
/// <param name="searchPattern">模式字符串，"*"代表0或N个字符，"?"代表1个字符。
/// 范例："Log*.xml"表示搜索所有以Log开头的Xml文件。</param>
public static bool Contains(string directoryPath, string searchPattern)
{
try
{
//获取指定的文件列表
string[] fileNames = GetFileNames(directoryPath, searchPattern, false);
//判断指定文件是否存在
if (fileNames.Length == 0)
{
return false;
}
else
{
return true;
}
}
catch (Exception ex)
{
throw new Exception(ex.Message);
//LogHelper.WriteTraceLog(TraceLogLevel.Error, ex.Message);
}
}
/// <summary>
/// 检测指定目录中是否存在指定的文件
/// </summary>
/// <param name="directoryPath">指定目录的绝对路径</param>
/// <param name="searchPattern">模式字符串，"*"代表0或N个字符，"?"代表1个字符。
/// 范例："Log*.xml"表示搜索所有以Log开头的Xml文件。</param>
/// <param name="isSearchChild">是否搜索子目录</param>
public static bool Contains(string directoryPath, string searchPattern, bool isSearchChild)
{
try
{
//获取指定的文件列表
string[] fileNames = GetFileNames(directoryPath, searchPattern, true);
//判断指定文件是否存在
if (fileNames.Length == 0)
{
return false;
}
else
{
return true;
}
}
catch (Exception ex)
{
throw new Exception(ex.Message);
//LogHelper.WriteTraceLog(TraceLogLevel.Error, ex.Message);
}
}
#endregion
#region 文件目录创建操作
/// <summary>
/// 创建目录
/// </summary>
/// <param name="dir">要创建的目录路径包括目录名</param>
public static void CreateDir(string dir)
{
if (dir.Length == 0) return;
if (!Directory.Exists(dir))
Directory.CreateDirectory(dir);
}
/// <summary>
/// 创建一个目录
/// </summary>
/// <param name="directoryPath">目录的绝对路径</param>
public static void CreateDirectory(string directoryPath)
{
//如果目录不存在则创建该目录
if (!IsExistDirectory(directoryPath))
{
Directory.CreateDirectory(directoryPath);
}
}
#endregion
#region 文件目录删除、移动、复制操作
/// <summary>
/// 删除目录
/// </summary>
/// <param name="dir">要删除的目录路径和名称</param>
public static void DeleteDir(string dir)
{
if (dir.Length == 0) return;
if (Directory.Exists(dir))
Directory.Delete(dir);
}
/// <summary>
/// 清空指定目录下所有文件及子目录,但该目录依然保存.
/// </summary>
/// <param name="directoryPath">指定目录的绝对路径</param>
public static void ClearDirectory(string directoryPath)
{
if (IsExistDirectory(directoryPath))
{
//删除目录中所有的文件
string[] fileNames = GetFileNames(directoryPath);
for (int i = 0; i < fileNames.Length; i++)
{
DeleteFile(fileNames[i]);
}
//删除目录中所有的子目录
string[] directoryNames = GetDirectories(directoryPath);
for (int i = 0; i < directoryNames.Length; i++)
{
DeleteDirectory(directoryNames[i]);
}
}
}
/// <summary>
/// 删除指定目录及其所有子目录
/// </summary>
/// <param name="directoryPath">指定目录的绝对路径</param>
public static void DeleteDirectory(string directoryPath)
{
if (IsExistDirectory(directoryPath))
{
Directory.Delete(directoryPath, true);
}
}
#endregion
#region 文件目录读取操作
/// <summary>
/// 获取指定目录中所有子目录列表,若要搜索嵌套的子目录列表,请使用重载方法.
/// </summary>
/// <param name="directoryPath">指定目录的绝对路径</param>
public static string[] GetDirectories(string directoryPath)
{
try
{
return Directory.GetDirectories(directoryPath);
}
catch (IOException ex)
{
throw ex;
}
}
/// <summary>
/// 获取指定目录中所有文件列表
/// </summary>
/// <param name="directoryPath">指定目录的绝对路径</param>
public static string[] GetFileNames(string directoryPath)
{
//如果目录不存在，则抛出异常
if (!IsExistDirectory(directoryPath))
{
throw new FileNotFoundException();
}
//获取文件列表
return Directory.GetFiles(directoryPath);
}
/// <summary>
/// 获取指定目录及子目录中所有文件列表
/// </summary>
/// <param name="directoryPath">指定目录的绝对路径</param>
/// <param name="searchPattern">模式字符串，"*"代表0或N个字符，"?"代表1个字符。
/// 范例："Log*.xml"表示搜索所有以Log开头的Xml文件。</param>
/// <param name="isSearchChild">是否搜索子目录</param>
public static string[] GetFileNames(string directoryPath, string searchPattern, bool isSearchChild)
{
//如果目录不存在，则抛出异常
if (!IsExistDirectory(directoryPath))
{
throw new FileNotFoundException();
}
try
{
if (isSearchChild)
{
return Directory.GetFiles(directoryPath, searchPattern, SearchOption.AllDirectories);
}
else
{
return Directory.GetFiles(directoryPath, searchPattern, SearchOption.TopDirectoryOnly);
}
}
catch (IOException ex)
{
throw ex;
}
}
/// <summary>
/// 获得指定目录下的文件列表
/// </summary>
/// <param name="path">路径</param>
/// <returns></returns>
public static string[] GetDirectoryFileList(string path, string searchPattern)
{
if (!Directory.Exists(path))
return new string[0];
DirectoryInfo dirInfo = new DirectoryInfo(path);
FileInfo[] fileInfos = dirInfo.GetFiles(searchPattern);
string[] result = new string[fileInfos.Length];
for (int i = 0; i < fileInfos.Length; i++)
{
result[i] = fileInfos[i].Name;
}
return result;
}
/// <summary>
/// 获取指定目录的所有文件列表
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
public static string[] GetDirectoryFileList(string path)
{
return GetDirectoryFileList(path, "*.*");
}
/// <summary>
/// 根据时间得到目录名yyyyMMdd
/// </summary>
/// <returns></returns>
public static string GetDateDir()
{
return DateTime.Now.ToString("yyyyMMdd");
}
#endregion
#endregion
#region 文件流操作
/// <summary>
/// 将流读取到缓冲区中
/// </summary>
/// <param name="stream">原始流</param>
public static byte[] StreamToBytes(Stream stream)
{
try
{
//创建缓冲区
byte[] buffer = new byte[stream.Length];
//读取流
stream.Read(buffer, 0, Convert.ToInt32(stream.Length));
//返回流
return buffer;
}
catch (IOException ex)
{
throw ex;
}
finally
{
//关闭流
stream.Close();
}
}
/// <summary>
/// 将 byte[] 转成 Stream
/// </summary>
public static Stream BytesToStream(byte[] bytes)
{
Stream stream = new MemoryStream(bytes);
return stream;
}
/// <summary>
/// 将 Stream 写入文件
/// </summary>
public static void StreamToFile(Stream stream, string fileName)
{
// 把 Stream 转换成 byte[]
byte[] bytes = new byte[stream.Length];
stream.Read(bytes, 0, bytes.Length);
// 设置当前流的位置为流的开始
stream.Seek(0, SeekOrigin.Begin);
// 把 byte[] 写入文件
FileStream fs = new FileStream(fileName, FileMode.Create);
BinaryWriter bw = new BinaryWriter(fs);
bw.Write(bytes);
bw.Close();
fs.Close();
}
/// <summary>
/// 从文件读取 Stream
/// </summary>
public static Stream FileToStream(string fileName)
{
// 打开文件
FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read);
// 读取文件的 byte[]
byte[] bytes = new byte[fileStream.Length];
fileStream.Read(bytes, 0, bytes.Length);
fileStream.Close();
// 把 byte[] 转换成 Stream
Stream stream = new MemoryStream(bytes);
return stream;
}
/// <summary>
/// 文件转字节流
/// </summary>
/// <param name="path">文件路径</param>
/// <returns></returns>
public static byte[] FileToBytes(string path)
{
FileStream fs = File.OpenRead(path);
MemoryStream ms = new MemoryStream();
int bdata;
while ((bdata = fs.ReadByte()) != -1)
{
ms.WriteByte(((byte)bdata));
}
byte[] data = (byte[])ms.ToArray();
fs.Close();
ms.Close();
return data;
}
/// <summary>
/// 把流生成文件
/// </summary>
/// <param name="buffer">文件流</param>
/// <param name="fileName">要生成的文件名【路】</param>
public static bool UpLoadFile(byte[] buffer, string filePath)
{
try
{
//如果文件不存在则创建该文件
if (!IsExistFile(filePath))
{
//创建文件
using (FileStream fs = File.Create(filePath))
{
//写入二进制流
fs.Write(buffer, 0, buffer.Length);
}
return true;
}
}
catch
{
return false;
}
return false;
}
/// <summary>
/// 图片转为base64编码
/// </summary>
/// <param name="filePath">路径</param>
/// <returns></returns>
public static string ImgToBase64String(string filePath)
{
try
{
Bitmap bmp = new Bitmap(filePath);
MemoryStream ms = new MemoryStream();
bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
byte[] arr = new byte[ms.Length];
ms.Position = 0;
ms.Read(arr, 0, (int)ms.Length);
ms.Close();
return Convert.ToBase64String(arr);
}
catch (Exception e)
{
//Logger.WriteLog("图片转为base64编码出现异常\r\n" + e.Message + "\r\n");
}
return "";
}
/// <summary>
/// 图片转为base64编码
/// </summary>
/// <param name="bmp">图片流</param>
/// <returns></returns>
public static string ImgToBase64String(Bitmap bmp)
{
try
{
MemoryStream ms = new MemoryStream();
bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
byte[] arr = new byte[ms.Length];
ms.Position = 0;
ms.Read(arr, 0, (int)ms.Length);
ms.Close();
return Convert.ToBase64String(arr);
}
catch (Exception e)
{
//Logger.WriteLog("图片转为base64编码出现异常\r\n" + e.Message + "\r\n");
}
return "";
}
/// <summary>
/// base64编码的文本转为图片
/// </summary>
/// <param name="photo">base64编码</param>
/// <param name="filePath">保存绝对路径</param>
/// <returns></returns>
public static bool Base64ToImage(string photo, string filePath)
{
try
{
string dirpath = filePath;//文件保存路径
if (!Directory.Exists(dirpath))
{
Directory.CreateDirectory(dirpath);
}
if (File.Exists(filePath))
{
File.Delete(filePath);
}
byte[] arr = Convert.FromBase64String(photo);
MemoryStream ms = new MemoryStream(arr);
ms.Write(arr, 0, arr.Length);
Bitmap bmp = new Bitmap(ms);
bmp.Save(filePath, ImageFormat.Png);
bmp.Dispose();
return true;
}
catch (Exception e)
{
//Logger.WriteLog("base64编码的文本转为图片出现异常\r\n" + e.Message + "\r\n base64编码" + photo + "\r\n");
return false;
}
}
/// <summary>
/// 根据图片路径返回图片的字节流byte[]
/// </summary>
/// <param name="imagePath">图片路径</param>
/// <returns>返回的字节流</returns>
public static byte[] ImageToByte(string imagePath)
{
try
{
FileStream files = new FileStream(imagePath, FileMode.Open);
byte[] imgByte = new byte[files.Length];
files.Read(imgByte, 0, imgByte.Length);
files.Close();
return imgByte;
}
catch (Exception ee)
{
return null;
}
}
/// <summary>
/// 图片转换成字节流
/// </summary>
/// <param name="bmp">要转换的Image对象</param>
/// <returns>转换后返回的字节流</returns>
public static byte[] ImgToByte(Bitmap bmp)
{
MemoryStream ms = new MemoryStream();
byte[] imagedata = null;
bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
imagedata = ms.GetBuffer();
bmp.Dispose();
return imagedata;
}
/// <summary>
/// 字节流转换成图片
/// </summary>
/// <param name="byt">要转换的字节流</param>
/// <returns>转换得到的Image对象</returns>
public static Image ByteToImg(byte[] byt)
{
try
{
MemoryStream ms = new MemoryStream(byt);
Image img = Image.FromStream(ms);
return img;
}
catch (Exception ee)
{
return null;
}
}
/// <summary>
/// 计算文件大小函数(保留两位小数),Size为字节大小
/// </summary>
/// <param name="Size">初始文件大小</param>
/// <returns></returns>
public static string CountSize(long Size)
{
string m_strSize = "";
long FactSize = 0;
FactSize = Size;
if (FactSize < 1024.00)
m_strSize = FactSize.ToString("F2") + " 字节";
else if (FactSize >= 1024.00 && FactSize < 1048576)
m_strSize = (FactSize / 1024.00).ToString("F2") + " KB";
else if (FactSize >= 1048576 && FactSize < 1073741824)
m_strSize = (FactSize / 1024.00 / 1024.00).ToString("F2") + " MB";
else if (FactSize >= 1073741824)
m_strSize = (FactSize / 1024.00 / 1024.00 / 1024.00).ToString("F2") + " GB";
return m_strSize;
}
/// <summary>
/// 获取文件夹大小
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
public static string GetDictSize(string path)
{
if (!Directory.Exists(path))
return "0";
string[] fs = Directory.GetFiles(path, "*.*", SearchOption.AllDirectories);
//获取该文件夹中所有的文件名
long ll = 0;
foreach (string f in fs)
{
dynamic fa = File.GetAttributes(f);
FileInfo fi = new FileInfo(f);
ll += fi.Length;
}
return CountSize(ll);
}
/// <summary>
/// 将文件转换为文件字符流
/// </summary>
/// <param name="FilePath"></param>
/// <returns></returns>
public static string FileToBinary(string FilePath)
{
FileStream input = new FileStream(FilePath, FileMode.Open, FileAccess.Read);
int count = Convert.ToInt32(input.Length);
byte[] buffer = new byte[count];
BinaryReader reader = new BinaryReader(input);
for (int i = 0; i < count; i++)
{
reader.Read(buffer, 0, count);
}
input.Close();
return Convert.ToBase64String(buffer);
}
/// <summary>
/// 将字符流转换为文件
/// </summary>
/// <param name="path"></param>
/// <param name="Binary"></param>
public static void BinaryToFile(string path, string Binary)
{
FileStream output = new FileStream(path, FileMode.Create, FileAccess.Write);
BinaryWriter writer = new BinaryWriter(output);
writer.Write(Convert.FromBase64String(Binary));
writer.Close();
output.Close();
}
#endregion
}显示效果：
可以使用不同的文件类库进行文件操作，但大体都差不多。
以上类库内容来源互联网，站长稍作整理
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