上传图片并创建相应文件夹

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//前台代码
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="test.aspx.cs" Inherits="test" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

</head>
<body>

//后台代码

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;

public partial class test : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string UploadFileName, UploadFileLastName;
        UploadFileName = FileUpload1.PostedFile.FileName;//文件在本地的原始位置
UploadFileLastName = UploadFileName.Substring(UploadFileName.LastIndexOf(".")   1);//得到文件的扩展名
Random rd = new Random();//产生随机数
int valationNo = 10   rd.Next(99);//产生随机数
string suiji = valationNo.ToString();//产生随机数
string UpLoadFileTime = DateTime.Now.ToString("yyyyMMddHHmmss")   suiji;//得到系统时间并加上随机数以便生成上传图片名称
string NewUploadFileName = UpLoadFileTime   "."   UploadFileLastName;//产生上传图片的名称

string UserDirectory = "TestFile";//所要创建文件夹的名字，实际运用中可为用户注册ID
        string UserPath = Server.MapPath("UploadFiles").ToString()   "\\"   UserDirectory   "\\"   "ProductsImages";
        if (!Directory.Exists(UserPath)) //如果文件夹不存在则创建
{
Directory.CreateDirectory(UserPath);
        }
        FileUpload1.PostedFile.SaveAs(NewUploadPahtName);//用保存的方法将图片上载
string sUser_ProductsImageUrl = "UploadFiles/"   UserDirectory   "/"   "ProductsImages/"   NewUploadFileName;//得到服务端图片的虚拟路径
//Response.Write(sUser_ProductsImageUrl);
    }
}
http://www.cnblogs.com/zm235/archive/2006/09/23/512673.html