将 vCard 的 Unicode 转换为 Windows-1252

发布于 2024-10-06 07:44:56 字数 701 浏览 7 评论 0原文

我正在尝试用 C# 编写一个程序，它将包含多个联系人的 vCard (VCF) 文件拆分为每个联系人的单独文件。据我所知，vCard 需要保存为 ANSI (1252)，大多数手机才能读取它们。

但是，如果我使用 StreamReader 打开 VCF 文件，然后使用 StreamWriter 将其写回（将编码格式设置为 1252），则所有特殊字符如 å、æ 和 ø 被写为 ?。 ANSI (1252) 肯定会支持这些字符。我该如何解决这个问题？

编辑：这是我用来读取和写入文件的代码片段。

private void ReadFile()
{
   StreamReader sreader = new StreamReader(sourceVCFFile);
   string fullFileContents = sreader.ReadToEnd();
}

private void WriteFile()
{
   StreamWriter swriter = new StreamWriter(sourceVCFFile, false, Encoding.GetEncoding(1252));
   swriter.Write(fullFileContents);
}

原文

I am trying to write a program in C# that will split a vCard (VCF) file with multiple contacts into individual files for each contact. I understand that the vCard needs to be saved as ANSI (1252) for most mobile phones to read them.

However, if I open a VCF file using StreamReader and then write it back with StreamWriter (setting 1252 as the Encoding format), all special characters like å, æ and ø are getting written as ?. Surely ANSI (1252) would support these characters. How do I fix this?

Edit: Here's the piece of code I use to read and write the file.

private void ReadFile()
{
   StreamReader sreader = new StreamReader(sourceVCFFile);
   string fullFileContents = sreader.ReadToEnd();
}

private void WriteFile()
{
   StreamWriter swriter = new StreamWriter(sourceVCFFile, false, Encoding.GetEncoding(1252));
   swriter.Write(fullFileContents);
}

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

海风掠过北极光 2024-10-13 07:44:56

您假设 Windows-1252 支持上面列出的特殊字符是正确的（有关完整列表，请参阅维基百科条目）。

using (var writer = new StreamWriter(destination, true, Encoding.GetEncoding(1252)))
{
    writer.WriteLine(source);
}

在我的测试应用程序中，使用上面的代码产生了这样的结果：

看看我可以写的很酷的字母：å、æ 和 ø!

没有找到问号。使用StreamReader读取时是否设置编码？

编辑：
您应该能够使用 Encoding.Convert 将 UTF-8 VCF 文件转换为 Windows-1252。不需要Regex.Replace。这是我的做法：

// You might want to think of a better method name.
public string ConvertUTF8ToWin1252(string source)
{
    Encoding utf8 = new UTF8Encoding();
    Encoding win1252 = Encoding.GetEncoding(1252);

    byte[] input = source.ToUTF8ByteArray();  // Note the use of my extension method
    byte[] output = Encoding.Convert(utf8, win1252, input);

    return win1252.GetString(output);
}

这是我的扩展方法的外观：

public static class StringHelper
{
    // It should be noted that this method is expecting UTF-8 input only,
    // so you probably should give it a more fitting name.
    public static byte[] ToUTF8ByteArray(this string str)
    {
        Encoding encoding = new UTF8Encoding();
        return encoding.GetBytes(str);
    }
}

另外，您可能想要将 using 添加到您的 ReadFile 和 WriteFile 方法中。

You are correct in assuming that Windows-1252 supports the special characters you listed above (for a full list see the Wikipedia entry).

using (var writer = new StreamWriter(destination, true, Encoding.GetEncoding(1252)))
{
    writer.WriteLine(source);
}

In my test app using the code above it produced this result:

Look at the cool letters I can make: å, æ, and ø!

No question marks to be found. Are you setting the encoding when your reading it in with StreamReader?

EDIT:
You should just be able to use Encoding.Convert to convert the UTF-8 VCF file into Windows-1252. No need for Regex.Replace. Here is how I would do it:

// You might want to think of a better method name.
public string ConvertUTF8ToWin1252(string source)
{
    Encoding utf8 = new UTF8Encoding();
    Encoding win1252 = Encoding.GetEncoding(1252);

    byte[] input = source.ToUTF8ByteArray();  // Note the use of my extension method
    byte[] output = Encoding.Convert(utf8, win1252, input);

    return win1252.GetString(output);
}

And here is how my extension method looks:

public static class StringHelper
{
    // It should be noted that this method is expecting UTF-8 input only,
    // so you probably should give it a more fitting name.
    public static byte[] ToUTF8ByteArray(this string str)
    {
        Encoding encoding = new UTF8Encoding();
        return encoding.GetBytes(str);
    }
}

Also you'll probably want to add usings to your ReadFile and WriteFile methods.

回复收藏 0 原文

~没有更多了~