对freetextbox控件的上传代码作几点修改

    freetextbox控件的确是一个很不错的控件，后台发布内容的时候很方便，然而该控件自身也存在不少缺点，若直接拿来使用，会有一些不便之处，拿该控件的上传图片功能来说吧，因为该控件在开发的时候仅简单实现了上传功能，没有考虑太多，比如再次上传的图片文件名与已存在的文件名同名的话，空间上已有的图片将会被覆盖，因而对用户本身来说会带来一些不必要的麻烦，在此问题之下，我自己试着对该控件的代码作了一些简单的修改，代码如下(红色为修改部分)：

   首先：打开ftb.imagegallery.aspx文件,以下是修改部分，

public void UploadImage_OnClick(object sender, EventArgs e) {
 if (Page.IsValid) {
  if (CurrentImagesFolder.Value != "") {
   if (UploadFile.PostedFile.FileName.Trim() != "") {
    if (IsValidFileType(UploadFile.PostedFile.FileName)) {
     try {
      //string UploadFileName = "";
      string UploadFileDestination = "";
      //UploadFileName = UploadFile.PostedFile.FileName;
      //UploadFileName = UploadFileName.Substring(UploadFileName.LastIndexOf("\\")+1);
                        string filename = UploadFile.PostedFile.FileName;                //取得文件名
                        int i = filename.Length;
                        filename = filename.Remove(0, i - 4);
                        string s = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + DateTime.Now.Millisecond.ToString();//设置文件名
      UploadFileDestination = HttpContext.Current.Request.PhysicalApplicationPath;
      UploadFileDestination += CurrentImagesFolder.Value;
      UploadFileDestination += "\\";
      UploadFile.PostedFile.SaveAs(UploadFileDestination +s+filename);
      ResultsMessage.Text = UploadSuccessMessage;
     } catch(Exception ex) {
      //ResultsMessage.Text = "Your file could not be uploaded: " + ex.Message;
      ResultsMessage.Text = UploadFailureMessage;
     }
    } else {
     ResultsMessage.Text = InvalidFileTypeMessage;
    }
   } else {
    ResultsMessage.Text = NoFileMessage;
   }
  } else {
   ResultsMessage.Text = NoFolderSpecifiedMessage;
  }
 } else {
  ResultsMessage.Text = InvalidFileTypeMessage;
 
 }
 DisplayImages();
}