FtpWebRequest ListDirectory不会返回所有文件 [英] FtpWebRequest ListDirectory does not return all files

问题描述

我试图从一个拥有大约9000个文件的FTP位置检索文件列表。

但是下面的代码总是只给出97个文件。在第98个文件的循环开始处， StreamReader.Peek（）变为-1

输出test.txt总是只有前97个文件，因为FTP响应本身只包含97个文件。

欣赏任何帮助。

  requestList =（FtpWebRequest）WebRequest.Create（xxx）; 
 requestList.Credentials = new NetworkCredential（xx，xx）; 
 requestList.Method = WebRequestMethods.Ftp.ListDirectoryDe​​tails; 
 
 responseList =（FtpWebResponse）requestList.GetResponse（）; 
 responseListStream = responseList.GetResponseStream（）; 
 listReader = new StreamReader（responseListStream）; 
 
 using（StreamWriter w = new StreamWriter（test.txt））
 {
 while（listReader.Peek（）> = 0）
 {
 w.WriteLine（listReader.ReadLine（））; 
} 
 w.Close（）; 
 
  

解决方案 Peek（）条件是错误的。它会打破你的循环，只要暂时没有数据准备好阅读。

使用此代码：

 字符串行; 
 while（！string.IsNullOrEmpty（line = listReader.ReadLine（）））
 {
 w.WriteLine（line）; 
} 
  

虽然如果您只需复制流，请使用：

  w.Write（listReader.ReadToEnd（））; 
  

甚至更好（更高效）：

<使用（Stream fileStream = File.Create（test.txt））
{
responseListStream.CopyTo（fileStream）; pre>
}


I am trying to retrieve the list of files from a FTP location which has about 9000 files.

But the following code always gives only 97 files. In the beginning of the loop for the 98th file, the StreamReader.Peek() turns to -1

The output "test.txt" always has only the first 97 files, as in, the FTP response itself contains only 97 files.

Appreciate any help.

requestList = (FtpWebRequest)WebRequest.Create("xxx");
requestList.Credentials = new NetworkCredential("xx", "xx");
requestList.Method = WebRequestMethods.Ftp.ListDirectoryDetails;

responseList = (FtpWebResponse)requestList.GetResponse();
responseListStream = responseList.GetResponseStream();
listReader = new StreamReader(responseListStream);

using (StreamWriter w = new StreamWriter("test.txt"))
{
    while (listReader.Peek() >= 0)
    {
        w.WriteLine(listReader.ReadLine());
    }
    w.Close();
}

解决方案

The Peek() condition is wrong. It breaks your loop whenever there's momentarily no data ready for reading.

Use this code:

string line;
while (!string.IsNullOrEmpty(line = listReader.ReadLine()))
{
    w.WriteLine(line);
}

Though if you just need to copy the stream, use this:

w.Write(listReader.ReadToEnd());

Or even better (more efficient):

using (Stream fileStream = File.Create("test.txt"))
{
    responseListStream.CopyTo(fileStream);
}

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