admin/pic_upload.aspx.cs

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using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
using System.Data.Sql;
using System.IO;
public partial class admin_pic_upload : 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 filename = TextBox1.Text.Trim();
            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
           
            bool FileUploadPathExists = File.Exists(Server.MapPath("UpLoad"));
            //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"));
            }
            //保存上传的文件
            string savapath = Server.MapPath("UpLoad" );//保存路径
            string savapath1 = "UpLoad" + "\\" + newfilename;//保存路径
            FileUpload1.PostedFile.SaveAs(savapath + "\\" + newfilename);
            //连接数据库字符串


            string connstr = ConfigurationManager.ConnectionStrings["yutian66"].ConnectionString;