public class FileHelper { #region 文件名/扩展名/路径名 /// <summary> /// 获取文件名 /// </summary> /// <param name="filepath"></param> /// <returns></returns> public static string GetFileName(string filepath) { return File.Exists(filepath) ? new FileInfo(filepath).Name : ""; } /// <summary> /// 取文件扩展名 /// </summary> /// <param name="filepath"></param> /// <returns></returns> public static string GetFileExt(string filepath) { return File.Exists(filepath) ? new FileInfo(filepath).Extension : ""; } /// <summary> /// 取文件所在路径名,结尾不含 “\” /// </summary> /// <param name="filepath"></param> /// <returns></returns> public static string GetFolder(string filepath) { var info = new FileInfo(filepath).Directory; return info != null ? info.FullName : ""; } #endregion #region 文件读写 /// <summary> /// 读取文本文件内容 /// </summary> /// <param name="filePath">文件路径</param> /// <returns></returns> public static string ReadTextFile(string filePath) { string strFileContent = ""; if (File.Exists(filePath)) { strFileContent = File.ReadAllText(filePath); } return strFileContent; } /// <summary> /// 文本文件修改/替换 /// 将文件内容存入filePath指定文件,替换原有内容,若文件不存在,则新建文件 /// </summary> /// <param name="filePath"></param> /// <param name="content"> </param> /// <returns></returns> public static bool ModifyFile(string filePath, string content) { if (File.Exists(filePath)) { File.Delete(filePath); } using (FileStream fs = File.Create(filePath)) { Byte[] file = new UTF8Encoding(true).GetBytes(content); fs.Write(file, 0, file.Length); } return File.Exists(filePath); } /// <summary> /// 二进制文件修改/替换 /// 将文件内容存入filePath指定文件,替换原有内容,若文件不存在,则新建文件 /// </summary> /// <param name="filepath"></param> /// <param name="file"></param> /// <returns></returns> public static bool ModifyFile(string filepath, byte[] file) { if (File.Exists(filepath)) { File.Delete(filepath); } using (FileStream fs = File.Create(filepath)) { fs.Write(file, 0, file.Length); } return File.Exists(filepath); } /// <summary> /// 文本文件附加 /// 将内容附加到文件尾 /// </summary> /// <param name="filepath"></param> /// <param name="content"></param> public static void AppendFile(string filepath, string content) { if (!File.Exists(filepath)) { ModifyFile(filepath, content); } else { using (var fs = File.AppendText(filepath)) { fs.WriteLine(content); } } } #endregion }