• Download executable - 105 Kb
• Download source - 152 Kb

Description

This article presents a fully functional implementation of a FTP client. FTP Wanderer is a multithreaded FTP client with the look-and-feel of Windows Explorer, and makes moving files between the Internet and your computer as simple as local file manipulation. This application uses WININET API's to handle the FTP protocol, and while it's not the most elegant way to connect to a FTP server it does the job pretty well.

Features list

• All file transfer requests are handled in the background, so you don't have to wait while files copy to continue browsing the current server. You can even connect to a different server, while file transfers on another server are still in progress.
• The Transfer Manager shows all file transfers currently in progress plus the ones that are in the queue. You can configure how many transfers are processed simultaneously, so you don't run out of resources.
• FTP Wanderer uses the Windows 9x/NT/XP style list boxes for displaying the contents of remote servers. With all familiar system icons and context menus.
• You can specify the number of times it should try to connect, and the time delay between connection attempts.
• Full Drag and Drop support. Simply drag one or more files or even complete folders onto FTP Wanderer's file view area to transfer them to the location of the server that is currently connected.
• Easily configure FTP site settings, like username, password, port, initial remote folder, number of retries and default download folder.

Here's a brief description of some of the important classes of the application:

CMainFrame

CMainFrame contains most of the code for managing the FTP connection. It takes care of connecting to the server; initiate up/downloads and handling other FTP related actions.

CFTPListView

This is just a CListView derived class that takes care of displaying the files and enabling you to sort them. When the application is busy downloading or sorting a directory listing it can display an animation, just like explorer does.

CConnectDlg

This class (= Site Manager) enables the user to manage FTP sites. You can add/change and delete sites and configure properties such as hostname, port, username and password. The settings of each site are save to disk using serializing.

CTransferManagerDlg

CTransferManagerDlg (= Transfer manager) takes care of queuing the file transfers. It shows all file transfers currently in progress plus the ones that are in the queue. You can configure how many transfers are processed simultaneously, so you don't run out of resources. Each up/download in handled in a separate thread by initiating aCDownloadThread or CUploadThread thread.

CDownloadThread

Each download is handled in the background using a separate thread. CDownloadThread creates a new connection with the FTP server and displays a progress dialog that tells you the status of the file transfer. When the download is completed (or aborted) it notifies the transfer manager so the UI can be updated.

CUploadThread

Each upload is handled in the background using a separate thread. CUploadThread creates a new connection with the FTP server and displays a progress dialog that tells you the status of the file transfer. When the upload is completed (or aborted) it notifies the transfer manager so the UI can be updated.

To do list:

While this application has most of the features you might expect in a FTP client, there are a few things left to do:

• Drag and drop support out of the file view area to Explorer. I think this one is not that easy, because this would probably 'block' explorer until the file transfer is completed (any suggestions?).
• Progress indication in the transfer manager. This is not really that hard to do, so this will probably be in the next release.
• Better asynchrony handling of getting directory listing. The UI now does not respond when downloading a huge directory listing.

Contacting the Author

Revision history

• 31st July 2002 - Initial revision.

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

原文地址：http://www.codeproject.com/Articles/2665/FTP-Wanderer-FTP-Client-using-WININET

• Download control source - 2.61 KB
• Download demo - 2.19 MB

以上是源码及演示程序下载地址

（文章原地址 http://www.codeproject.com/Articles/24969/An-MFC-picture-control-to-dynamically-show-picture）

Introduction 介绍

这篇文章描述的是一个可以用于在对话框上显示各种主流类型图片 (如 BMP, GIF, JPEG...) 的MFC控件

Background 背景

我花了一些时间去搜索可以用于显示图片的MFC控件, 但却没有发现合适的。 所以我决定自己做一个轻量级，灵活度高的图片控件（Picture control）去显示各种类型的图片。

Using the code 如何使用

这个控件内部使用的是GDI+库，所以请在使用时把GdiPlus.lib加入到你的工程中（include libraries）。

使用这个控件时，先用VC++对话框设计器创建一个静态文字控件（static text control） 。之后用MFC向导为这个控件分配一个控件变量，类型定义为CPictureCtrl。

现在你可以用你的控件装载显示图片了，你只需要在这几个CPictureCtrl::LoadFrom... 函数， 选择合适你需要的的进行调用。装载后控件会自动更新并显示图片。

要清除掉控件中显示的图片，调用CPictureCtrl::FreeImage即可。

你的图片会被自动调整到控件的大小，这可能会改变图片原先的长宽比例。

 Collapse | Copy Code

class CPictureCtrl :     
public CStatic 
{
 public:      
   //Constructor     
   CPictureCtrl(void);      
   //Destructor     
   ~CPictureCtrl(void); 
 
public:      
   //Loads an image from a file     
   BOOL LoadFromFile(CString &szFilePath);      
   //Loads an image from an IStream interface     
   BOOL LoadFromStream(IStream* piStream);      
   //Loads an image from a byte stream;     
   BOOL LoadFromStream(BYTE* pData, size_t nSize);      
   //Loads an image from a Resource 
   //     BOOL LoadFromResource(HMODULE hModule, LPCTSTR lpName, LPCTSTR lpType);      
   //Overload - Single load function     
   BOOL Load(CString &szFilePath);     
   BOOL Load(IStream* piStream);     
   BOOL Load(BYTE* pData, size_t nSize); 
   //     BOOL Load(HMODULE hModule, LPCTSTR lpName, LPCTSTR lpType);      
   //Frees the image data     
   void FreeData();
  
protected:     
   virtual void PreSubclassWindow();      
   //Draws the Control     
   virtual void DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct);    
   virtual BOOL OnEraseBkgnd(CDC* pDC);
  
private:      
   //Internal image stream buffer     
   IStream* m_pStream;      
   //Control flag if a pic is loaded    
    BOOL m_bIsPicLoaded;      
   //GDI Plus Token     
   ULONG_PTR m_gdiplusToken; };

Points of interest

这个控件是基于 CStatic control 设计的（基类使用的是CStatic）。所以你可以使用CStatic control的各种功能，但它并不会显示任何文字。对GDI+库的使用使其可以支持各种主流类型的图片。

History 历史

• 1.0 - Initial release.
• 1.1 - A bug when drawing the control without a loaded image was corrected.
• 1.2 - A bug when drawing the control was corrected.

  Loading an image from a resource is disabled due to problems recognizing it correctly as an image.

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)