.NET中的文件IO操作实例

1.写入文件代码：

 //1.1 生成文件名和设置文件物理路径
         Random random = new Random(DateTime.Now.Millisecond);
         string fileName = System.DateTime.Now.ToString("yyMMddHHmmss")+random.Next();
         string PhysicalPath = Server.MapPath("../File/Template/productDetails/" + fileName + ".txt");

         //1.2 判断文件是否存在
         if (!File.Exists(PhysicalPath))
         {
             FileStream fs = new FileStream(PhysicalPath, FileMode.Create);
             StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.UTF8);
             sw.Write(proDetails);
             sw.Close();
             fs.Close();
         }
         else
         {
             Page.ClientScript.RegisterStartupScript(this.GetType(), "addAtt", "<script>alert('添加失败，请重试！');location.href='#'</script>");
         }

2.读取文件代码：

 //将商品详情写入文件中
         string detailsPath=CreateFile(proDetails);
         string filePath = Server.MapPath("../File/Template/productDetails/" + detailsPath+".txt");
             if (File.Exists(url))
             {
                 // Create the file.
                 using (FileStream fs=new FileStream(url,FileMode.Open))
                 {
                    StreamReader sr=new StreamReader(fs,Encoding.Default);
                    this.aaa.InnerHtml = sr.ReadToEnd();
                    sr.Close();
                 }
             }

3. 删除文件：

 //1.1 生成文件名和设置文件物理路径
         string phpPath=Server.MapPath(path);
         if (File.Exists(phpPath))
         {
             File.Delete(phpPath);
         }