C# -- Open , Read, Write, Create 文件

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; namespace SetEnvDiff { class Program { static void Main(string [] args) { try { //Prepare path string sourceFile = String.Format("{0}//school//vcdriver_setenv.txt", Environment.GetEnvironmentVariable("SystemDrive")); string targetFile = Path.ChangeExtension(sourceFile, "cmd"); //Create targetFile and write into it if (!File.Exists(sourceFile)) { Console.WriteLine(String.Format("Error: File /"{0}/" should exist.", sourceFile)); } else { //delete the target cmd file if there is one existing //Now it seems no need to do this //Create the target cmd file if there is no using (File.Create(targetFile)){ } //Copy line from source file, add "Set ", and the write into target file using (StreamReader srSource = File.OpenText(sourceFile)) { using (StreamWriter swTarget = new StreamWriter(targetFile)) { string line; while ((line = srSource.ReadLine()) != null) { swTarget.WriteLine(String.Format("Set {0}", line)); } } } } //Execute the target file System.Diagnostics.Process.Start(targetFile); } catch (Exception e) { Console.WriteLine(e.ToString()); } //execute setenvdiff.cmd } } }