hsgupfile.aspx.cs

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;

namespace SimpleExam
{
    public partial class hsgupfile : System.Web.UI.Page
    {
        public string fname;
        protected void Page_Load(object sender, EventArgs e)
        {
            hsgimage.Visible = false;
        }
        protected void Button1_Click(object sender, EventArgs e)
        {
            if (UploadFile.Value != null && UploadFile.Value != "")
            {
                hsgupload();
            }
            hsgimage.Visible = true;

        }
        private void hsgupload()
        {
            if (UploadFile.Value != null)
            {
                string nam = UploadFile.PostedFile.FileName;
                //取得文件名(抱括路径)里最后一个"."的索引
                int i = nam.LastIndexOf(".");
                //取得文件扩展名
                string newext = nam.Substring(i);
                //这里我自动根据日期和文件大小不同为文件命名,确保文件名不重复
                Random rnd = new Random();
                int n = rnd.Next(1000, 9999);
                string newname = DateTime.Now.Year.ToString().Trim() + DateTime.Now.Month.ToString().Trim() + DateTime.Now.Day.ToString().Trim() + DateTime.Now.Hour.ToString().Trim() + DateTime.Now.Minute.ToString().Trim() + DateTime.Now.Second.ToString().Trim() + n.ToString().Trim();
                //保存文件到你所要的目录,这里是IIS根目录下的uploadfiles目录
                //注意: 我这里用Server.MapPath()取当前文件的绝对目录.在asp.net里"\"必须用"\\"代替
                UploadFile.PostedFile.SaveAs(Server.MapPath("uppic/" + newname + newext));

                //得到这个文件的相关属性:文件名,文件类型,文件大小
                //string fname;
                fname = newname + newext;
                //Response.Write("<script>javascript:alert('"+fname+"');</script>");
                //fenc.Text=UploadFile.PostedFile.ContentType ;
                //fsize.Text=UploadFile.PostedFile.ContentLength.ToString();
                //Image1.ImageUrl = "http://localhost/web/news/uploadfiles/"+newname+newext;
            }
        }
    }
}