畅捷通文件上传

protected void Page_Load(object sender, EventArgs e)  {    this.ReadResources();    if (base.Request.Files.Count == 1)    {      string text = "images/index.gif";      object obj = this.ViewState["fileName"];      if (obj != null)      {        text = obj.ToString();      }      if (this.File1.PostedFile.ContentLength > 204800)      {        base.Response.Write(string.Concat(new string[]        {          "<script language='javascript'>alert('",          this.PhotoTooLarge,          "'); parent.document.getElementById('myimg').src='",          text,          "';</script>"        }));        return;      }      if (this.File1.PostedFile.ContentType != "image/jpeg" && this.File1.PostedFile.ContentType != "image/bmp" && this.File1.PostedFile.ContentType != "image/gif" && this.File1.PostedFile.ContentType != "image/pjpeg")      {        base.Response.Write(string.Concat(new string[]        {          "<script language='javascript'>alert('",          this.PhotoTypeError,          "'); parent.document.getElementById('myimg').src='",          text,          "';</script>"        }));        return;      }      string fileName = this.File1.PostedFile.FileName;      string text2 = fileName.Substring(fileName.LastIndexOf('\') + 1);      this.File1.PostedFile.SaveAs(base.Server.MapPath(".") + "\images\" + text2);      string value = base.Server.MapPath(".") + "\images\" + text2;      this.ViewState["fileName"] = "images/" + text2;      this.Session["ImageName"] = value;    }  }