如何使 Stream.Write() 以 UTF-8 格式输出

发布于 2024-12-09 11:03:15 字数 578 浏览 0 评论 0原文

我的问题是这样的：

我正在使用 ASP.NET 生成并上传 SQL 文件，但是将文件保存到 FTP 服务器后，ü 等字符更改为 &uul;、ø 更改为 ø 等等...如何解决我可以阻止这种情况发生吗？我不希望文件采用 ASCII 代码格式，而是采用 UTF-8 格式。

生成和上传文件的代码如下所示：

//request = the object to be made an request out of.
Stream requestStream = request.GetReguestStream();
var encoding = new UTF8Encoding();
//fileContent is the string to be saved in the file
byte[] buffer = encoding.GetBytes(fileContent); 
requestStream.Write(buffer, 0, buffer.Length);
requestStream.Close();

如您所见，我尝试使用 System.Text.UTF8Encoding，但它不起作用。

原文

My issue is this:

I am generating and uploading a SQL file using ASP.NET, but after the file is saved to the FTP server, characters like ü are changed to &uul;, ø to ø and so on... How can I prevent this from happening? I don't want the file to be formatted with ASCII code, but with UTF-8.

The code that generates and uploads the file looks like this:

//request = the object to be made an request out of.
Stream requestStream = request.GetReguestStream();
var encoding = new UTF8Encoding();
//fileContent is the string to be saved in the file
byte[] buffer = encoding.GetBytes(fileContent); 
requestStream.Write(buffer, 0, buffer.Length);
requestStream.Close();

As you can see I've tried to use the System.Text.UTF8Encoding, but it doesn't work.

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漆黑的白昼 2024-12-16 11:03:15

请记住，对于流，您几乎总是可以根据需要包装流。如果您想编写 UTF-8 编码内容，请使用正确的编码将请求流包装在 StreamWriter 中：

using (Stream requestStream = request.GetRequestStream())
using (StreamWriter writer = new StreamWriter(requestStream, Encoding.UTF8)) {
  writer.Write(fileContent);
}

既然您说您要上传到 Web 服务，请务必设置您的内容编码。由于您尚未发布 request 对象的来源，因此我假设它是一个正常的 HttpWebRequest。

对于 HttpWebRequest，您可以使用 ContentType 属性告诉服务器内容编码是什么。

request.ContentType = "text/plain;charset=utf-8";

不过，正如其他人提到的，FTP 传输本身也可能会破坏它。如果可以的话，请确保它以二进制模式而不是 ASCII 模式传输。

Remember, with streams you can almost always wrap the streams as necessary. If you want to write UTF-8 encoded content you wrap the request stream in a StreamWriter with the correct encoding:

using (Stream requestStream = request.GetRequestStream())
using (StreamWriter writer = new StreamWriter(requestStream, Encoding.UTF8)) {
  writer.Write(fileContent);
}

Since you say you're uploading to a web service be sure to set your content encoding as well. Since you haven't posted where the request object comes from, I'll assume it's a normal HttpWebRequest.

With a HttpWebRequest you would tell the server what the content encoding is by using the ContentType property.

request.ContentType = "text/plain;charset=utf-8";

As others have mentioned, though, the FTP transfer itself may be breaking it too. If you can, make sure it's transferred in binary mode, not ASCII mode.

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