.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(10000);
        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);
        }