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.Data.SqlClient;
using System.IO;

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

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        if (FileUpload1.PostedFile.FileName == string.Empty)
        {
            Response.Write("<script>alert('请选择要上传的文件！');</script>");
        }
        else
        {
            //获取要上传的文件的信息
            string filepath = FileUpload1.PostedFile.FileName;//文件路径
            string oldfilename = filepath.Substring(filepath.LastIndexOf("\\")+1);//文件名
            string FileExtension = Path.GetExtension(oldfilename); //文件的扩展名
            int filelength = (int)oldfilename.Length;//文件名长度
            //随机生成文件名
            Random Rnd = new Random();
            int strRnd = Rnd.Next(1, 99);
            string newfilename = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + strRnd.ToString() + FileExtension.ToLower();
            //将文件上传到以当前日期命名的文件夹中
            string UpLoadName = DateTime.Now.Year.ToString()+"-"+DateTime.Now.Month.ToString()+"-"+DateTime.Now.Day.ToString();
            bool FileUploadPathExists = File.Exists(Server.MapPath("UpLoad"+"\\"+UpLoadName));
            //指定文件夹不存在，如果不存在就创建该文件夹
            if (!FileUploadPathExists)
            {
                Directory.CreateDirectory(Server.MapPath("UpLoad"+"\\"+UpLoadName));
            }
            //保存上传的文件
            string savapath = Server.MapPath("UpLoad" + "\\" + UpLoadName);//保存路径
            string savapath1 = "UpLoad" + "\\" + UpLoadName +"\\"+ newfilename;//保存路径
            FileUpload1.PostedFile.SaveAs(savapath + "\\" + newfilename);
            //连接数据库字符串
            string connStr = @"Data Source=.\SQLEXPRESS;AttachDbFilename=D:\Web_Test\WebSite4\App_Data\Database.mdf;Integrated Security=True;User Instance=True";
            SqlConnection conn = new SqlConnection(connStr);
            conn.Open();
            string cmdtext = "insert into T_UpFile(FileName,FileLength,FileType,FilePath) values('" + newfilename + "','" + filelength + "','" + FileExtension + "','"+savapath1+"')";
            SqlCommand cmd = new SqlCommand(cmdtext, conn);
            try
            {
                cmd.ExecuteNonQuery();
                System.Text.StringBuilder strMsg = new System.Text.StringBuilder();
                strMsg.Append("<font color=green>文件被成功添加到数据库中，详细信息如下所示：<br>");
                strMsg.Append("上传的文件的类型为：" + this.FileUpload1.PostedFile.ContentType.ToString() + "<br>");
                strMsg.Append("客户端文件的地址为：" + filepath + "<br>");
                strMsg.Append("上传文件的文件名为：" + newfilename + "<br>");
                strMsg.Append("文件上传到服务器的路径为：" + savapath + "<br>");
                strMsg.Append("上传文件的扩展名为：" + FileExtension + "<br>");
                strMsg.Append("上传文件的大小为：" + FileUpload1.PostedFile.ContentLength + "个字节</font>");
                this.Label1.Text = strMsg.ToString();
            }
            catch (Exception error)
            {
                Response.Write(error.ToString());
            }
            finally
            {
                conn.Close();
            }
        }
    }
}
//数据库设计

create T_UpFile

(

FileID int identity(100000,1) primary key,

FileName varchar(50),

FileLength int ,

FileType varchar(20),

FilePath varchar(MAX),

)