通过HTTP将文件上传到ASP.NET，再上传到C#中的FTP服务器

问题描述：

上传表格:

<form asp-action="Upload" asp-controller="Uploads" enctype="multipart/form-data">
<input type="file" name="file" maxlength="64" />
<button type="submit">Upload</button>

控制器/文件上传:

public void Upload(IFormFile file){
    using (WebClient client = new WebClient())
    {
        client.Credentials = new NetworkCredential("xxxx", "xxxx");
        client.UploadFile("ftp://xxxx.xxxx.net.uk/web/wwwroot/images/", "STOR", file.FileName);
    }
}

问题:

获取错误找不到文件xxxx" .我知道问题在于，它正在尝试在FTP服务器上查找文件"C:\path-to-vs-files\examplePhoto.jpg"，该文件显然不存在.我一直在这里查看许多问题/答案，我认为我需要某种FileStream读/写鳕鱼.但是我目前还不完全了解这个过程.

Getting error "Could not find file xxxx". I understand the issue is that it's trying to find the file as it is "C:\path-to-vs-files\examplePhoto.jpg" on the FTP server, which obviously doesn't exist. I've been looking at many questions/answers on here and I think I need some kind of FileStream read/write cod. But I'm not fully understanding the process at the moment.

答

使用 IFormFile.CopyTo 或 IFormFile.OpenReadStream 以访问上载文件的内容.

Use IFormFile.CopyTo or IFormFile.OpenReadStream to access the contents of the uploaded file.

尽管 WebClient 无法使用 Stream界面.因此，最好使用 FtpWebRequest :>

public void Upload(IFormFile file)
{
    FtpWebRequest request =
        (FtpWebRequest)WebRequest.Create("ftp://ftp.example.com/remote/path/file.zip");
    request.Credentials = new NetworkCredential("username", "password");
    request.Method = WebRequestMethods.Ftp.UploadFile;  

    using (Stream ftpStream = request.GetRequestStream())
    {
        file.CopyTo(ftpStream);
    }
}

通过HTTP将文件上传到ASP.NET，再上传到C#中的FTP服务器

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