C# asp.net visual-studio-2010 ftpwebrequest

C# ASPX FTP 上传后文件大小错误

发布于 2024-12-12 20:53:45 字数 866 浏览 3 评论 0原文

我正在通过 FTP 上传一个 613.6 kb 的文件，它是一个 PDF 文件。当它到达服务器时，它现在是 82 KB。

在我的 Web.Config 中，我

<httpRuntime executionTimeout="7200" maxRequestLength="2097151" requestValidationMode="2.0"/>

的代码是这样的，

 void UploadFileToFtp(FileInfo file, FtpWebRequest req)
    {
        int buffLength = 2048;

        using (var reader = new BinaryReader(file.OpenRead(), Encoding.Default))

        {
            using (var writer = new BinaryWriter(req.GetRequestStream()))
            {
                while (reader.PeekChar() > 0) writer.Write(reader.ReadBytes(buffLength));
                writer.Flush();
                writer.Close();
            }
            reader.Close();
        }

    }

我认为它与编码有关，所以我尝试了 ASCII、默认和 Unicode，但没有任何区别。我添加了同花顺和关闭，以为可以做到这一点，但也没有帮助。我收到有关编码的错误，一旦我添加错误就消失了，但我没有其他错误。

原文

I am uploading a file through FTP that is 613.6 kb, it is a PDF file. When it arrives on the server it is now 82 KB.

in my Web.Config I have

<httpRuntime executionTimeout="7200" maxRequestLength="2097151" requestValidationMode="2.0"/>

my Code is this

 void UploadFileToFtp(FileInfo file, FtpWebRequest req)
    {
        int buffLength = 2048;

        using (var reader = new BinaryReader(file.OpenRead(), Encoding.Default))

        {
            using (var writer = new BinaryWriter(req.GetRequestStream()))
            {
                while (reader.PeekChar() > 0) writer.Write(reader.ReadBytes(buffLength));
                writer.Flush();
                writer.Close();
            }
            reader.Close();
        }

    }

I thought it had something to do with the Encoding so I tried ASCII, Default and Unicode none of which made a diffrence. I added the Flush and the Close thinking that was doing it, but no help either. I was getting an error regarding the encoding and once I added that the error went away, but I have no other errors.

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ι不睡觉的鱼゛ 2024-12-19 20:53:46

是否该文件包含零，并且您的比较应该是 reader.PeekChar() >=0 而不是 reader.PeekChar() > 0？

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相守太难 2024-12-19 20:53:46

您真的需要使用 BinaryWriter 和 BinaryReader 吗？它们可能会进行某种缓冲，我不相信您需要这样做。尝试这段代码，看看会发生什么

var buffer = new byte[2048];
int bytesRead = 0;
var reqStream = req.GetRequestStream();

using (var fs = file.OpenRead())
{
    while (0 < (bytesRead = fs.Read(buffer, 0, buffer.Length)))
        reqStream.Write(buffer, 0, bytesRead);
}

Do you really need to use BinaryWriter and BinaryReader, they are likely doing some kind of buffering I am not convinced you need that. Try this code and see what happens

var buffer = new byte[2048];
int bytesRead = 0;
var reqStream = req.GetRequestStream();

using (var fs = file.OpenRead())
{
    while (0 < (bytesRead = fs.Read(buffer, 0, buffer.Length)))
        reqStream.Write(buffer, 0, bytesRead);
}

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