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  • C#中文件操作类FileUtil

     public class FileUtil
        {
            /// <summary>
            /// 换行符
            /// </summary>
            public static string NewLine = "\r\n";
            #region 检测指定目录是否存在
            /// <summary>
            /// 检测指定目录是否存在
            /// </summary>
            /// <param name="directoryPath">目录的绝对路径</param>         
            public static bool IsExistDirectory(string directoryPath)
            {
                return Directory.Exists(directoryPath);
            }
            #endregion

            #region 检测指定文件是否存在
            /// <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);
            }
            #endregion

            #region 检测指定目录是否为空
            /// <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 (Exception ex)
                {
                    Log.Logger.Error("FileUtil:IsEmptyDirectory;Common", ex);
                    return true;
                }
            }
            #endregion

            #region 检测指定目录中是否存在指定的文件
            /// <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)
                {
                    Log.Logger.Error("FileUtil:Contains();Common", ex);
                    return false;
                }
            }
            /// <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)
                {
                    Log.Logger.Error("FileUtil:Contains();Common", ex);
                    return false;
                }
            }
            #endregion

            #region 创建一个目录
            /// <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 创建一个文件
            /// <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;
                }
            }

            /// <summary>
            /// 创建一个文件
            /// </summary>
            /// <param name="filePath">路径</param>
            /// <param name="s">内容</param>
            /// <param name="encode">编码</param>
            /// <returns></returns>
            public static bool CreateFile(string filePath, string s, string encode)
            {
                bool ret = true;
                //string path = ConfigurationManager.AppSettings["MakeContentPath"];
                Encoding code = Encoding.GetEncoding(encode);
                StreamWriter sw = null;
                try
                {

                    //if (!Directory.Exists(path + filePath))
                    //    Directory.CreateDirectory(path + filePath);
                    sw = new StreamWriter(HttpHandle.AppPath + filePath, false, code);
                    sw.Write(s);
                    sw.Flush();
                }
                catch (Exception ex)
                {
                    ret = false;
                    throw ex;
                }
                finally
                {
                    sw.Close();
                }
                return ret;
            }
            #endregion

            #region 获取文本文件的行数
            /// <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;
            }
            #endregion

            #region 获取一个文件的长度
            /// <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 int GetFileSize(string filePath)
            {
                //创建一个文件对象
                FileInfo fi = new FileInfo(filePath);
                //获取文件的大小
                return (int)fi.Length;
            }
            /// <summary>
            /// 获取一个文件的长度,单位为KB
            /// </summary>
            /// <param name="filePath">文件的路径</param>         
            public static double GetFileSizeByKB(string filePath)
            {
                //创建一个文件对象
                FileInfo fi = new FileInfo(filePath);
                //获取文件的大小
                return Convert.ToDouble(Convert.ToDouble(fi.Length) / 1024);
            }
            /// <summary>
            /// 获取一个文件的长度,单位为MB
            /// </summary>
            /// <param name="filePath">文件的路径</param>         
            public static double GetFileSizeByMB(string filePath)
            {
                //创建一个文件对象
                FileInfo fi = new FileInfo(filePath);
                //获取文件的大小
                return Convert.ToDouble(Convert.ToDouble(fi.Length) / 1024 / 1024);
            }
            #endregion

            #region 获取指定目录中的文件列表
            /// <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;
                }
            }
            #endregion

            #region 获取指定目录中的子目录列表
            /// <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>
            /// 获取指定目录及子目录中所有子目录列表
            /// </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[] GetDirectories(string directoryPath, string searchPattern, bool isSearchChild)
            {
                try
                {
                    if (isSearchChild)
                    {
                        return Directory.GetDirectories(directoryPath, searchPattern, SearchOption.AllDirectories);
                    }
                    else
                    {
                        return Directory.GetDirectories(directoryPath, searchPattern, SearchOption.TopDirectoryOnly);
                    }
                }
                catch (IOException ex)
                {
                    throw ex;
                }
            }
            #endregion

            #region 向文本文件写入内容
            /// <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="content">写入的内容</param>         
            public static void WriteText(string filePath, string content)
            {
                //向文件写入内容
                File.WriteAllText(filePath, content);
            }
            #endregion

            #region 向文本文件的尾部追加内容
            /// <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)
            {
                File.AppendAllText(filePath, content);
            }
            #endregion

            #region 将现有文件的内容复制到新文件中
            /// <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);
            }
            #endregion

            #region 将文件移动到指定目录
            /// <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);
                }
            }
            #endregion

            #region 将流读取到缓冲区中
            /// <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 (Exception ex)
                {
                    throw ex;
                }
                finally
                {
                    //关闭流
                    stream.Close();
                }
            }
            #endregion

            #region 将文件读取到缓冲区中
            /// <summary>
            /// 将文件读取到缓冲区中
            /// </summary>
            /// <param name="filePath">文件的绝对路径</param>
            public static byte[] FileToBytes(string filePath)
            {
                //获取文件的大小  
                int fileSize = GetFileSize(filePath);
                //创建一个临时缓冲区
                byte[] buffer = new byte[fileSize];
                //创建一个文件流
                FileInfo fi = new FileInfo(filePath);
                FileStream fs = fi.Open(FileMode.Open);
                try
                {
                    //将文件流读入缓冲区
                    fs.Read(buffer, 0, fileSize);
                    return buffer;
                }
                catch (IOException ex)
                {
                    throw ex;
                }
                finally
                {
                    //关闭文件流
                    fs.Close();
                }
            }
            #endregion

            #region 将文件读取到字符串中
            /// <summary>
            /// 将文件读取到字符串中
            /// </summary>
            /// <param name="filePath">文件的绝对路径</param>
            public static string FileToString(string filePath)
            {
                return FileToString(filePath, Encoding.Default);
            }
            /// <summary>
            /// 将文件读取到字符串中
            /// </summary>
            /// <param name="filePath">文件的绝对路径</param>
            /// <param name="encoding">字符编码</param>
            public static string FileToString(string filePath, Encoding encoding)
            {
                //创建流读取器
                StreamReader reader = new StreamReader(filePath, encoding);
                try
                {
                    //读取流
                    return reader.ReadToEnd();
                }
                catch (Exception ex)
                {
                    throw ex;
                }
                finally
                {
                    //关闭流读取器
                    reader.Close();
                }
            }
            #endregion

            #region 从文件的绝对路径中获取文件名( 包含扩展名 )
            /// <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 从文件的绝对路径中获取文件名( 不包含扩展名 )
            /// <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];
            }
            #endregion

            #region 从文件的绝对路径中获取扩展名
            /// <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

            #region 清空指定目录
            /// <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]);
                    }
                }
            }
            #endregion

            #region 清空文件内容
            /// <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 删除指定文件
            /// <summary>
            /// 删除指定文件
            /// </summary>
            /// <param name="filePath">文件的绝对路径</param>
            public static void DeleteFile(string filePath)
            {
                if (IsExistFile(filePath))
                {
                    File.Delete(filePath);
                }
            }
            #endregion

            #region 删除指定目录
            /// <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

        }
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  • 原文地址:https://www.cnblogs.com/kevinGao/p/2238888.html
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