.NET中的文件IO操作实例

1.写入文件代码：

 1 //1.1 生成文件名和设置文件物理路径
 2         Random random = new Random(DateTime.Now.Millisecond);
 3         string fileName = System.DateTime.Now.ToString("yyMMddHHmmss")+random.Next(10000);
 4         string PhysicalPath = Server.MapPath("../File/Template/productDetails/" + fileName + ".txt");
 5 
 6         //1.2 判断文件是否存在
 7         if (!File.Exists(PhysicalPath))
 8         {
 9             FileStream fs = new FileStream(PhysicalPath, FileMode.Create);
10             StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.UTF8);
11             sw.Write(proDetails);
12             sw.Close();
13             fs.Close();
14         }
15         else
16         {
17             Page.ClientScript.RegisterStartupScript(this.GetType(), "addAtt", "<script>alert('添加失败，请重试！');location.href='#'</script>");
18         }

2.读取文件代码：

 1 //将商品详情写入文件中
 2         string detailsPath=CreateFile(proDetails);
 3         string filePath = Server.MapPath("../File/Template/productDetails/" + detailsPath+".txt");
 4             if (File.Exists(url))
 5             {
 6                 // Create the file.
 7                 using (FileStream fs=new FileStream(url,FileMode.Open))
 8                 {
 9                    StreamReader sr=new StreamReader(fs,Encoding.Default);
10                    this.aaa.InnerHtml = sr.ReadToEnd();
11                    sr.Close();
12                 }
13             }

3. 删除文件：

1 //1.1 生成文件名和设置文件物理路径
2         string phpPath=Server.MapPath(path);
3         if (File.Exists(phpPath))
4         {
5             File.Delete(phpPath);
6         }