C#创建目录 var strpatj = HttpRuntime.AppDomainAppPath; if (!Directory.Exists(strpatj+"\\temp")) Directory.CreateDirectory(strpatj + "\\temp"); C#在目录下创建文件 StreamReader sr = new StreamReader(filestrem, System.Text.Encoding.GetEncoding("gb2312")); //读取这个流 using (StreamWriter sw = new StreamWriter(strpatj + "\\temp\\" + "temp.csv")) { sw.Write(sr.ReadToEnd()); //读取后, sr无数据 } //带编码方式写入 using (StreamWriter sw = new StreamWriter(strpatj + "\\temp\\" + "temp.csv", false, Encoding.GetEncoding("gb2312"))) { sw.Write(sr0.ReadToEnd()); } //在读取该文件,返回一个Stream. StreamReader sr1 = new StreamReader(strpatj + "\\temp\\" + "temp.csv", System.Text.Encoding.GetEncoding("gb2312")); //读取这个流 filestrem = sr1.BaseStream; //未测试 using (FileStream fsw = new FileStream(strpatj + "\\temp\\" + "temp.csv", FileMode.Create, FileAccess.Write)) //打开文件，用于只写?? { BinaryWriter bw = new BinaryWriter(fsw); //编写器指向这个文件流?? bw.Write(System.IO.File.ReadAllBytes(strpatj + "\\temp\\" + "temp.csv")); //打开一个文件读取流信息，将其写入新文件?? System.IO.File.Delete(path + i.ToString() + "_" + filename); //删除指定文件信息?? bw.Flush(); //清理缓冲区?? }