C语言文件操作大全.pdf

1.创建文件夹 //using System.IO; Directory.CreateDirectory(%%1); 2.创建文件 //using System.IO; File.Create(%%1); 3.删除文件 //using System.IO; File.Delete(%%1); 4.删除文件夹 //using System.IO; Directory.Delete(%%1); 5.删除一个目录下所有的文件夹 //using System.IO; foreach (string dirStr in Directory.GetDirectories(%%1)) { DirectoryInfo dir = new DirectoryInfo(dirStr); ArrayList folders=new ArrayList(); FileSystemInfo[] fileArr = dir.GetFileSystemInfos(); for (int i = 0; i folders.Count; i++) { FileInfo f = folders[i] as FileInfo; if (f == null) { DirectoryInfo d = folders[i] as DirectoryInfo; d.Delete(); } } } 6.清空文件夹 //using System.IO; Directory.Delete(%%1,true); Directory.CreateDirectory(%%1); 7.读取文件 //using System.IO; StreamReader s = File.OpenText(%%1); string %%2 = null; while ((%%2 = s.ReadLine()) != null){ %%3 } s.Close(); 8.写入文件 //using System.IO; FileInfo f = new FileInfo(%%1); StreamWriter w = f.CreateText(); w.WriteLine(%%2); w.Close(); 9.写入随机文件 //using System.IO; byte[] dataArray = new byte[100000];//new Random().NextBytes(dataArray); using(FileStream FileStream = new FileStream(%%1, FileMode.Create)){ // Write the data to the file, byte by byte. for(int i = 0; i dataArray.Length; i++){ FileStream.WriteByte(dataArray[i]); } // Set the stream position to the beginning of the file. FileStream.Seek(0, SeekOrigin.Begin); // Read and verify the data. for(int i = 0; i FileStream.Length; i++){ if(dataArray[i] != FileStream.ReadByte()){ //写入数据错误 return; } } //数据流+FileStream.Name+ 已验证 } 10.读取文件属性 //using System.IO; FileInfo f = new FileInfo(%%1);//f.CreationTime,f.FullName if((f.Attributes FileAttributes.ReadOnly) != 0){ %%2 } else{ %%3 } 11.写入属性 //using System.IO; FileInfo f = new File