C#上传文件,读取文件夹和文件

using System.IO;

 

    Protected void ReadFile()     //读取文件夹，文件
    ...{
        string savePath = @"PackNetProductIMG";
        string absSavePath = Server.MapPath(savePath);

        string[] Directorys = Directory.GetDirectories(absSavePath + @"/" + Page.User.Identity.Name);
        for (int i = 0; i < Directorys.Length; i++)
        ...{
            Response.Write(Directorys[i] + " <br/ >");
        }
        Response.Write("Directorys count：" + Directorys.Length + "个  <br/ >--------- <br >");
        string[] Files = Directory.GetFiles(absSavePath + @"" + Page.User.Identity.Name, "*");
        for (int i = 0; i < Files.Length; i++)
        ...{
            Response.Write(Files[i] + " <br/ >");
        }
        Response.Write("Files count：" + Files.Length + "个  <br/ >--------- <br >");
    }

    protected void Button1_Click(object sender, EventArgs e)  //上传图片
    ...{
        string savePath = "/PackNet/ProductIMG";
        string absSavePath = Server.MapPath(savePath);

        if (!Directory.Exists(absSavePath))
            Directory.CreateDirectory(absSavePath);
        if (!Directory.Exists(absSavePath + @"" + Page.User.Identity.Name))
            Directory.CreateDirectory(absSavePath + @"" + Page.User.Identity.Name);
        if (this.PicFile.PostedFile.ContentLength < 100)
        ...{
            Response.Write("<script>alert('图片太小！！');</script>");
            return;
        }

        if (this.PicFile.PostedFile.ContentLength > 500000)
        ...{
            Response.Write("<script>alert('图片太大！！');</script>");
            return;
        }

        string clientFileName = this.PicFile.PostedFile.FileName;
        string exName = clientFileName.Substring(clientFileName.LastIndexOf('.')).ToLower();
        if (exName != ".bmp" && exName != ".jpg" && exName != ".gif")
        ...{
            Response.Write("<script>alert('文件格式错误！！');</script>");
            return;
        }

        string fileName = Guid.NewGuid().ToString();
        fileName += exName;

        this.PicFile.PostedFile.SaveAs(absSavePath + @"/" + Page.User.Identity.Name + @"/" + fileName);
    }

文章出处：http://www.diybl.com/course/4_webprogram/asp.net/netjs/20071020/78354.html