FreeTextBox控件上传图片到指定的绝对路径的改进

大家都用FreeTextBox控件，本人也非常喜欢用它，特别是发布图文信息的时候非常有用，上传图片的小插件是ftb.imagegallery.aspx

里面有源代码，我们可以更改，比如添加只有登录才能访问啊，对上传图片的类型进行检测啦（该控件已有的图片类型检查室已检查文件名后缀来进行的，会存在安全隐患，所以必须自己写），呵呵，好像跑题了，今天的重点是要让图片上传到指定的绝对路径。因为本控件，原始的代码只允许上传图片的路径是在主目录以内，但要是有必须上传到网站主目录以外的情况，就没办法了

本人就碰到了这个情况，本人做的一个网站是前后台分开的（为了安全），也就是说前台后台在IIS中是相互独立运行的网站，而且网站文件也存在不同的盘符上面，比如前台在D盘，而后台在E盘上

那我们在后台上传的图片文件怎么样上传到前台所在的D盘的目录中呢，因为只有这样前台才能正常访问。

我在网上找了很久，大家都认为这个控件对这个问题是无法解决的，一直没有找到解决办法，可是我还是不甘心，因为这个问题不解决，这个网站就没法做下去了，所以就硬着头皮去看源代码

仔细一看，看出点门道来了，我主要看ftb.imagegallery.aspx里上传图片，显示图片和目录的路径获取

结果发现了在这几个函数中都存在一个关键性的句子：string AppPath = HttpContext.Current.Request.PhysicalApplicationPath;

这个句子的意思很明显就是获得当前应用程序的物理路径，我立马想到，我如果能够将这个路径改成我需要上传到的绝对路径不就可以了吗？

非常兴奋，就修改代码尝试了

下面我们来看看我修改了哪几个函数

第一个：图片上传函数

public void UploadImage_OnClick(object sender, EventArgs e) {  
    Jake.Common.Common isfile = new Jake.Common.Common();  
    if (Page.IsValid) {  
        if (CurrentImagesFolder.Value != "") {  
            if (UploadFile.PostedFile.FileName.Trim() != "") {  
                if (IsValidFileType(UploadFile.PostedFile.FileName)) {  
                    if (isfile.IsAllowedFile(UploadFile.PostedFile, "255216") || isfile.IsAllowedFile(UploadFile.PostedFile, "7173"))//从文件流判断文件类型  
                    {  
                        try 
                        {  
                            string UploadFileName = "";  
                            string UploadFileDestination = "";  
                            UploadFileName = UploadFile.PostedFile.FileName;  
                            UploadFileName = DateTime.Now.ToString("yyyyMMddHHmmss") + UploadFileName.Substring(UploadFileName.LastIndexOf("\\") + 1);  
                            //UploadFileDestination = HttpContext.Current.Request.PhysicalApplicationPath;  
                            UploadFileDestination = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改成我指定的绝对路径，此路径我放在了Web.Config中灵活配置。  
                            UploadFileDestination += CurrentImagesFolder.Value;  
                            UploadFileDestination += "\\";  
                            UploadFile.PostedFile.SaveAs(UploadFileDestination + UploadFileName);  
                            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 = InvalidFileTypeMessage;  
                }  
            } else {  
                ResultsMessage.Text = NoFileMessage;  
            }  
        } else {  
            ResultsMessage.Text = NoFolderSpecifiedMessage;  
        }  
    } else {  
        ResultsMessage.Text = InvalidFileTypeMessage;  
          
    }  
    DisplayImages();  
} 
public void UploadImage_OnClick(object sender, EventArgs e) {
    Jake.Common.Common isfile = new Jake.Common.Common();
    if (Page.IsValid) {
  if (CurrentImagesFolder.Value != "") {
   if (UploadFile.PostedFile.FileName.Trim() != "") {
    if (IsValidFileType(UploadFile.PostedFile.FileName)) {
                    if (isfile.IsAllowedFile(UploadFile.PostedFile, "255216") || isfile.IsAllowedFile(UploadFile.PostedFile, "7173"))//从文件流判断文件类型
                    {
                        try
                        {
                            string UploadFileName = "";
                            string UploadFileDestination = "";
                            UploadFileName = UploadFile.PostedFile.FileName;
                            UploadFileName = DateTime.Now.ToString("yyyyMMddHHmmss") + UploadFileName.Substring(UploadFileName.LastIndexOf("\\") + 1);
                            //UploadFileDestination = HttpContext.Current.Request.PhysicalApplicationPath;
                            UploadFileDestination = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改成我指定的绝对路径，此路径我放在了Web.Config中灵活配置。
                            UploadFileDestination += CurrentImagesFolder.Value;
                            UploadFileDestination += "\\";
                            UploadFile.PostedFile.SaveAs(UploadFileDestination + UploadFileName);
                            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 = InvalidFileTypeMessage;
    }
   } else {
    ResultsMessage.Text = NoFileMessage;
   }
  } else {
   ResultsMessage.Text = NoFolderSpecifiedMessage;
  }
 } else {
  ResultsMessage.Text = InvalidFileTypeMessage;
  
 }
 DisplayImages();
}

第二个函数（图片删除函数）
：

public void DeleteImage_OnClick(object sender, EventArgs e) {  
    if (FileToDelete.Value != "" && FileToDelete.Value != "undefined") {  
        try {  
            //string AppPath = HttpContext.Current.Request.PhysicalApplicationPath;  
            string AppPath = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改成指定绝对路径  
            System.IO.File.Delete(AppPath  + CurrentImagesFolder.Value + "\\" + FileToDelete.Value);  
            ResultsMessage.Text = "已删除: " + FileToDelete.Value;  
        } catch//(Exception ex)   
        {             
            ResultsMessage.Text = "删除失败！";  
        }  
    } else {  
        ResultsMessage.Text = NoFileToDeleteMessage;  
    }  
    DisplayImages();  
} 
public void DeleteImage_OnClick(object sender, EventArgs e) {
 if (FileToDelete.Value != "" && FileToDelete.Value != "undefined") {
  try {
   //string AppPath = HttpContext.Current.Request.PhysicalApplicationPath;
            string AppPath = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改成指定绝对路径
   System.IO.File.Delete(AppPath  + CurrentImagesFolder.Value + "\\" + FileToDelete.Value);
   ResultsMessage.Text = "已删除: " + FileToDelete.Value;
  } catch//(Exception ex)
        {   
   ResultsMessage.Text = "删除失败！";
  }
 } else {
  ResultsMessage.Text = NoFileToDeleteMessage;
 }
 DisplayImages();
}

第三个函数：（（返回文件列表）

private string[] ReturnFilesArray() {  
    if (CurrentImagesFolder.Value != "") {  
        try {  
            //string AppPath = HttpContext.Current.Request.PhysicalApplicationPath;  
            string AppPath = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改成指定的绝对路径  
            string ImageFolderPath = AppPath + CurrentImagesFolder.Value;  
            string[] FilesArray = System.IO.Directory.GetFiles(ImageFolderPath,"*");  
            return FilesArray;  
              
              
        } catch {  
          
            return null;  
        }  
    } else {  
        return null;  
    }  
 
} 
private string[] ReturnFilesArray() {
 if (CurrentImagesFolder.Value != "") {
  try {
   //string AppPath = HttpContext.Current.Request.PhysicalApplicationPath;
            string AppPath = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改成指定的绝对路径
   string ImageFolderPath = AppPath + CurrentImagesFolder.Value;
   string[] FilesArray = System.IO.Directory.GetFiles(ImageFolderPath,"*");
   return FilesArray;
   
   
  } catch {
  
   return null;
  }
 } else {
  return null;
 }

}

第四个函数：（返回文件夹列表）

private string[] ReturnDirectoriesArray() {  
    if (CurrentImagesFolder.Value != "") {  
        try {  
            //string AppPath = HttpContext.Current.Request.PhysicalApplicationPath;  
            string AppPath = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改处  
            string CurrentFolderPath = AppPath + CurrentImagesFolder.Value;  
            string[] DirectoriesArray = System.IO.Directory.GetDirectories(CurrentFolderPath,"*");  
            return DirectoriesArray ;  
        } catch {  
            return null;  
        }  
    } else {  
        return null;  
    }  
} 
private string[] ReturnDirectoriesArray() {
 if (CurrentImagesFolder.Value != "") {
  try {
   //string AppPath = HttpContext.Current.Request.PhysicalApplicationPath;
            string AppPath = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改处
   string CurrentFolderPath = AppPath + CurrentImagesFolder.Value;
   string[] DirectoriesArray = System.IO.Directory.GetDirectories(CurrentFolderPath,"*");
   return DirectoriesArray ;
  } catch {
   return null;
  }
 } else {
  return null;
 }
}

第五个函数：（显示图片函数）

public void DisplayImages() {  
    string[] FilesArray = ReturnFilesArray();  
    string[] DirectoriesArray = ReturnDirectoriesArray();  
    //string AppPath = HttpContext.Current.Request.PhysicalApplicationPath;  
    string AppPath = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改处  
    string AppUrl;  
      
    //Get the application's URL  
    if (Request.ApplicationPath == "/")  
        AppUrl = Request.ApplicationPath;  
    else 
        AppUrl = Request.ApplicationPath + "/";  
      
    GalleryPanel.Controls.Clear();  
    if ( (FilesArray == null || FilesArray.Length == 0) && (DirectoriesArray == null || DirectoriesArray.Length == 0) ) {  
        gallerymessage.Text = NoImagesMessage + ": " + RootImagesFolder.Value;  
    } else {  
        string ImageFileName = "";  
        string ImageFileLocation = "";  
 
//。。。。。。。下面代码略 
public void DisplayImages() {
 string[] FilesArray = ReturnFilesArray();
 string[] DirectoriesArray = ReturnDirectoriesArray();
 //string AppPath = HttpContext.Current.Request.PhysicalApplicationPath;
    string AppPath = LTP.Common.ConfigHelper.GetConfigString("UpNewsImagePyPath");//修改处
 string AppUrl;
 
 //Get the application's URL
 if (Request.ApplicationPath == "/")
  AppUrl = Request.ApplicationPath;
 else
  AppUrl = Request.ApplicationPath + "/";
 
 GalleryPanel.Controls.Clear();
 if ( (FilesArray == null || FilesArray.Length == 0) && (DirectoriesArray == null || DirectoriesArray.Length == 0) ) {
  gallerymessage.Text = NoImagesMessage + ": " + RootImagesFolder.Value;
 } else {
  string ImageFileName = "";
  string ImageFileLocation = "";

//。。。。。。。下面代码略
 

好，到此为止呢，我们已经可以将图片上传到我们指定的绝对路径了，这个绝对路径就是我前台网站里的图片存储目录

可是这样还有个小问题，就是我们插入图片时时双击图片，然后图片就到了文本编辑器里了，看HTML代码就可以看到，返回的路径是，当前网站的绝对访问路径，也就是：http://192.168.1.5:8081/upimages/111.gif类似的路径

但是如果我们不修改此返回路径，那插入到编辑器里的图片将是无法显示的，因为当前网站下面根本不存在“upimages/111.gif”这个文件夹和文件，所以我们的修改成前台网站的访问地址，比如我的前台访问地址就是http://192.168.1.5:8082/upimages/111.gif

那我们怎么修改返回地址呢，我们仔细看代码，我们发现有

myImageHolder.Attributes["ondblclick"]="returnImage('ImageFileLocation.Replace("\\","/") + "','" + myImage.Width.ToString() + "','" + myImage.Height.ToString() + "');";    
                myImageHolder.Controls.Add(myHtmlImage); 
myImageHolder.Attributes["ondblclick"]="returnImage('ImageFileLocation.Replace("\\","/") + "','" + myImage.Width.ToString() + "','" + myImage.Height.ToString() + "');"; 
    myImageHolder.Controls.Add(myHtmlImage);

这个里面的事件是鼠标双击事件，很明显returnImage里就是要返回的图片访问路径啊，所以我们更改成

string address = LTP.Common.ConfigHelper.GetConfigString("Address");//在web.config文件里配置前台访问IP或地址  
myImageHolder.Attributes["ondblclick"]="returnImage('"+address + ImageFileLocation.Replace("\\","/") + "','" + myImage.Width.ToString() + "','" + myImage.Height.ToString() + "');";    
                myImageHolder.Controls.Add(myHtmlImage); 
string address = LTP.Common.ConfigHelper.GetConfigString("Address");//在web.config文件里配置前台访问IP或地址
myImageHolder.Attributes["ondblclick"]="returnImage('"+address + ImageFileLocation.Replace("\\","/") + "','" + myImage.Width.ToString() + "','" + myImage.Height.ToString() + "');"; 
    myImageHolder.Controls.Add(myHtmlImage);

这样双击返回的就是我们想要的http://192.168.1.5:8082/upimages/111.gif啦，在后台编辑时显示正常，同样前台访问肯定也很正常了，呵呵，至此修改结束

问题解决，因为在网上没找到相关资料

所以在这里记录下来

希望对有需求的朋友起到抛砖引玉的左右

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/j_jake/archive/2009/09/01/4508776.aspx