上传图片

来源：互联网发布：傅园慧走红网络编辑：程序博客网时间：2024/04/30 02:15

protected void Page_Load(object sender, EventArgs e)
    {
        ViewState["filePath"] = "";
        //Session["imagePath"];
    }
    /// <summary>
    /// 上传
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnsc_Click(object sender, EventArgs e)
    {
        if (this.fileupload1.HasFile)
        {
            if (ViewState["filePath"].ToString() != "")
            {

SQLHelper.FileManager.DeleteExistsImage(Server.MapPath(ViewState ["filePath"].ToString()));
}

            FileInfo file = new FileInfo(this.fileupload1.FileName);
            string _file = file.Extension.ToLower().ToString();
            if (_file.ToString() == ".gif" || _file.ToString() == ".jpg" || _file.ToString()             == ".bmp" || _file.ToString() == ".png")
            {
                //上传保存的时候更改名称
                //ViewState["filePath"] = DateTime.Now.Year.ToString() +                        DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() +                                DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() +                            his.FileUpload1.FileName.ToString();
                ViewState["filePath"] = "~/UpFile" + "//" + DateTime.Now.ToString                ("yyyyMMddHHmmss") + _file;
                this.fileupload1.SaveAs(Server.MapPath(ViewState["filePath"].ToString()));
                //this.Image1.Text = ViewState["filePath"].ToString();
                this.Image1.ImageUrl = ViewState["filePath"].ToString();
                Response.Write("<Script Language = Javascript>alert('您的图片上传成                功!');</Script>");
            }
            else
            {
                Response.Write("<Script Langauge = Javascript>alert('您的图片格式上传错                误!');</Script>");
            }
        }

        //if (this.fileupload1.FileName.ToString() == "")
        //{
        //    Response.Write("<script>alert('您还没有选择图片！');</script>");
        //}
        //else
        //{
        //    Session["imagePath"] = "~/UpFile" + this.fileupload1.FileName.ToString();
        //    fileupload1.SaveAs(Server.MapPath(Session["imagePath"].ToString()));
        //    Image1.ImageUrl = Session["imagePath"].ToString();
        //}
    }

public class FileManager
    {
        /// <summary>
        /// 删除已存在的图片
        /// </summary>
        /// <param name="path"></param>
        public static void DeleteExistsImage(string path)
        {
            try
            {
                FileInfo file = new FileInfo(path);
                if (file.Exists)
                {
                    file.Delete();
                }
            }
            catch(IOException ex)
            {
                throw ex;
            }
        }
    }