問題描述

誰能告訴我如何使用 FtpWebRequest 更改目錄?這似乎應(yīng)該是一件容易的事，但我沒有看到它.

編輯

我只是想補(bǔ)充一下...我對 FtpWebRequest 沒有興趣.如果有更好(更簡單)的方式在 .NET 中執(zhí)行 FTP，請告訴我.

顯然沒有辦法使用實(shí)時連接來做到這一點(diǎn)，您需要更改 uri 以欺騙 ftpwebrequest 使用不同的請求(感謝 Jon).

所以我正在尋找第 3 方客戶...

我嘗試過的一些開源解決方案效果不佳(一直崩潰)，但我找到了一個通過我的一些初步測試的開源解決方案(.NET FTP 客戶端).

有一個博文，它展示了如何偽造它 - 基本上你必須將目錄放在 URL 上.

我懷疑使用專用的 FTP 庫可能會更好 - 一個不會試圖將所有內(nèi)容都強(qiáng)制轉(zhuǎn)換為 WebRequest 做事方式的庫.我個人沒有為此使用任何 3rd 方庫，而是搜索FTP library .NET".找到很多候選人.

jcolebrand(以防 2006 年博客 linkrot 的可能性)

許多客戶詢問我們?nèi)绾螌?CWD 命令與我們的 FtpWebRequest 一起使用.

答案是:不能直接使用命令，但是可以修改uri參數(shù)達(dá)到同樣的效果.

假設(shè)您使用以下格式:

String uri = "ftp://myFtpUserName:myFtpUserPassword@myFtpUrl";FtpWebRequest 請求 = (FtpWebRequest)WebRequest.Create(uri);Request.Method =列表"；

<塊引用>

以上示例將帶您進(jìn)入用戶目錄并列出其中的所有內(nèi)容.現(xiàn)在假設(shè)您要向后移動 2 個目錄并列出其中的內(nèi)容(前提是您的用戶有權(quán)執(zhí)行此操作).你關(guān)閉之前的 FtpWebRequest 并使用這個 uri 發(fā)出一個新的

uri = "ftp://myFtpUserName:myFtpUserPassword@myFtpUrl/%2E%2E/%2E%2E";

<塊引用>

這相當(dāng)于使用您的用戶憑據(jù)登錄，然后使用 cd ../../

注意:如果您嘗試直接使用 ".." 而不轉(zhuǎn)義它們，則 uri 類將刪除它們，因此 "ftp://myFtpUserName:myFtpUserPassword@myFtpUrl/../.." 等價于 "ftp://myFtpUserName:myFtpUserPassword@myFtpUrl/"

現(xiàn)在假設(shè)您要轉(zhuǎn)到另一個用戶的目錄，該目錄比根目錄高一級.如果您不指定用戶名和密碼，則相當(dāng)于以匿名用戶身份登錄.然后你發(fā)出一個新的 FtpWebRequest 和下面的 uri

ftp://myFtpUrl/%2F/anotherUserDir"

<塊引用>

這相當(dāng)于匿名登錄然后做

Cd/cd 另一個用戶目錄

Can someone tell me how to change directories using FtpWebRequest? This seems like it should be an easy thing to do, but I'm not seeing it.

EDIT

I just want to add...I don't have my heart set on FtpWebRequest. If there's a better (easier) way to do FTP in .NET please let me know.

Apparently there's no way to do it using a live connection, you need to change the uri to trick ftpwebrequest into using a different request (thanks Jon).

So I'm looking for a 3rd party client...

Some of the open source solutions I tried didn't work too well (kept crashing), but I found one open source solution that's passed some of my preliminary tests (.NET FTP Client).

There's a blog post from Mariya Atanasova which shows how you can fake it - basically you have to put the directory on the URL.

I suspect you may be better off with a dedicated FTP library though - one that doesn't try to force everything into the WebRequest way of doing things. I haven't personally used any 3rd party libraries for this, but a search for "FTP library .NET" finds lots of candidates.

Edit: jcolebrand (in case of 2006 blog linkrot possibility)

Many customers ask us how they can use the CWD command with our FtpWebRequest.

The answer is: you cannot use the command directly, but you can modify the uri parameter to achieve the same result.

Let's say you're using the following format:

String uri = "ftp://myFtpUserName:myFtpUserPassword@myFtpUrl";
FtpWebRequest Request = (FtpWebRequest)WebRequest.Create(uri);
Request.Method = "LIST";

The above example will bring you to your user's directory and list all the contents there. Now let's say you want to go 2 directories backwards and list the contents there (provided your user has permissions to do that). You close the previous FtpWebRequest and issue a new one with this uri

uri = "ftp://myFtpUserName:myFtpUserPassword@myFtpUrl/%2E%2E/%2E%2E";

This is equivalent to logging in with your user's credentials and then using cd ../../

Note: if you try using the ".." directly without escaping them the uri class will strip them, so "ftp://myFtpUserName:myFtpUserPassword@myFtpUrl/../.." is equivalent to "ftp://myFtpUserName:myFtpUserPassword@myFtpUrl/"

Now let's say you want to go to another user's directory which is one level above the root. If you don't specify a user name and password it's equivalent to logging in as anonymous user. Then you issue a new FtpWebRequest with the following uri

"ftp://myFtpUrl/%2F/anotherUserDir"

This is equivalent to logging in as anonymous and then doing

Cd /
cd anotherUserDirectory

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