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??

}