C#文件管理常见方法汇总

通过File类实现文件的创建/删除/读取/写入.

#region 通过File类对文件操作//@表示字符串内转义符视为普通字符string path = @\"E:\\C#开发\\C#文件管理.txt\";if (File.Exists(path)){Console.WriteLine(\"找到文件\");//读取文件的数据string text = File.ReadAllText(path, Encoding.UTF8);Console.WriteLine(text);//要写入的内容string content = \"\\r\\n03    arss    wow\";//按照路径创建新的文件,并写入content//File.WriteAllText(path,content);//将制定内容追加到文本File.AppendAllText(path, content);}else{Console.WriteLine(\"文件不存在\");}string path2 = @\"E:\\C#开发\\C#文件管理.txt\";if (File.Exists(path2)){//删除制定路径的文件//File.Delete(path);}else{//创建制定路径下的文件File.Create(path);}#endregion

通过FileStream实现文件的读取/写入.

#region 通过FileStream操作文件string path3 = @\"E:\\C#开发\\C#文件管理2.txt\";//文件加载到文件流FileStream fileStream = new FileStream(path3, FileMode.OpenOrCreate);byte[] readData = new byte[fileStream.Length];//读取流int length = fileStream.Read(readData, 0, readData.Length);if (length == 0){Console.WriteLine(\"读取完毕\");}fileStream.Close();Console.WriteLine(Encoding.UTF8.GetString(readData));//文件加载到文件流FileStream writeFileStream = new FileStream(path3, FileMode.OpenOrCreate);string content3 = \"\\r\\n04    ady    wow\";byte[] writeData = Encoding.UTF8.GetBytes(content3);//写入流writeFileStream.Position = writeFileStream.Length;writeFileStream.Write(writeData, 0, writeData.Length);writeFileStream.Close();#endregion

通过StreamReader和StreamWrite读取/修改文件.

#region 通过streamReader和StreamWite读取和修改文件string path = @\"E:\\C#开发\\C#文件管理.txt\";//将指定路径的文件加载到streamreader流中.StreamReader streamReader = new StreamReader(path);string content = streamReader.ReadToEnd();streamReader.Close();Console.WriteLine(content);string content2 = \"\\r\\n05    jan    wow\";//将指定路径的文件加载到streamwrite流中,true表示追加,false表示覆盖.StreamWriter streamWriter = new StreamWriter(path, true);streamWriter.Write(content2);streamWriter.Close();#endregion

通过FileInfo创建/删除/访问文件信息.

#region 通过FileInfo类访问文件信息  FileInfo中包含文件的相关信息string path = @\"E:\\C#开发\\C#文件管理5.txt\";FileInfo fileInfo = new FileInfo(path);if (fileInfo.Exists)//判断文件是否存在{//fileInfo.Delete(); //删除文件Console.WriteLine(fileInfo.FullName);Console.WriteLine(fileInfo.CreationTime);Console.WriteLine(fileInfo.IsReadOnly);Console.WriteLine(fileInfo.LastAccessTime);Console.WriteLine(fileInfo.Name);}else{fileInfo.Create();//创建文件}#endregion#region 通过DirectoryInfo 对文件夹进行操作通过DirectoryInfo操作文件夹

string path = @\"E:\\C#开发\\C#文件管理\";DirectoryInfo directoryInfo = new DirectoryInfo(path);if (directoryInfo.Exists){//directoryInfo.Delete();Console.WriteLine(directoryInfo.FullName);Console.WriteLine(directoryInfo.Name);Console.WriteLine(directoryInfo.LastWriteTime);Console.WriteLine(directoryInfo.Root);}else{Console.WriteLine(\"指定路径下的文件夹不存在\");directoryInfo.Create();}#endregion