强制C＃使用ASCII [英] Force C# to use ASCII
问题描述
我工作在C＃应用程序，并需要阅读并从一个特定的数据文件的格式写的。目前唯一的问题是，该格式使用严格的单字节字符，和C＃不停地尝试在Unicode中抛出，当我用一个作家和一个字符数组（双打文件大小，以及其他严重的问题）。我一直对修改使用字节数组，而不是代码，但喂它们成树视图和DataGrid控件时，导致一些投诉，涉及转换和诸如此类的东西。
我花了一点时间google搜索，并且似乎没有成为一个简单的typedef我可以用它来强制字符键入为使用字节我计划，至少在没有导致额外的并发症。
有没有一种简单的方法来强制C＃的。NET 计划ASCII只使用，不碰的Unicode？
后来，我得到这个工作差不多。在BinaryReader /作家使用 ASCIIEncoding 结束了固定的大多数问题（的一些问题有一个多余的字符被追加到字符串发生，但我固定的了）。我有最后一个问题，这是非常小的，但可能是很大的：在该文件中，一个特定的字符（如打印欧元符号）被转换为 什么时候？我加载/保存的文件。这不是在文本的问题不大，但是，如果它发生在记录长度，它可以由千字节改变大小（不好，很明显）。 ？我认为这是由编码引起的，但如果从文件来了，为什么不能将其回去
精确的问题/结果是这样的：
-
原始文件：0x80的（欧元）
-
的编码：
** ASCII：0x3F的
** UTF8（？）：0xC280（A-帽子欧元）
无论这些结果的将工作，因为文件中的任何位置，它可以改变（如果80改变到3F在记录长度整型，它可以是65 *（256 ^ 3）之差）。不好。我试图用一个 UTF-8编码，盘算这将解决这个问题相当好，但它现在补充说，第二个字符，这是雪上加霜。
C＃（.NET）将始终使用Unicode字符串。这是由设计
在读取或写入文件，你可以，但是，使用一个StreamReader / StreamWriter的设置为强制ASCII编码，就像这样：
StreamReader的读者=新的StreamReader（FILESTREAM，新ASCIIEncoding（））;
然后，只需读取使用的StreamReader。
写作是一样的，只是使用的StreamWriter。
I'm working on an application in C# and need to read and write from a particular datafile format. The only issue at the moment is that the format uses strictly single byte characters, and C# keeps trying to throw in Unicode when I use a writer and a char array (which doubles filesize, among other serious issues). I've been working on modifying the code to use byte arrays instead, but that causes a few complaints when feeding them into a tree view and datagrid controls, and it involves conversions and whatnot.
I've spent a little time googling, and there doesn't seem to be a simple typedef I can use to force the char type to use byte for my program, at least not without causing extra complications.
Is there a simple way to force a C# .NET program to use ASCII-only and not touch Unicode?
Later, I got this almost working. Using the ASCIIEncoding on the BinaryReader/Writers ended up fixing most of the problems (a few issues with an extra character being prepended to strings occurred, but I fixed that up). I'm having one last issue, which is very small but could be big: In the file, a particular character (prints as the Euro sign) gets converted to a ? when I load/save the files. That's not an issue in texts much, but if it occurred in a record length, it could change the size by kilobytes (not good, obviously). I think it's caused by the encoding, but if it came from the file, why won't it go back?
The precise problem/results are such:
Original file: 0x80 (euro)
Encodings: ** ASCII: 0x3F (?) ** UTF8: 0xC280 (A-hat euro)
Neither of those results will work, since anywhere in the file, it can change (if an 80 changed to 3F in a record length int, it could be a difference of 65*(256^3)). Not good. I tried using a UTF-8 encoding, figuring that would fix the issue pretty well, but it's now adding that second character, which is even worse.
C# (.NET) will always use Unicode for strings. This is by design.
When you read or write to your file, you can, however, use a StreamReader/StreamWriter set to force ASCII Encoding, like so:
StreamReader reader = new StreamReader (fileStream, new ASCIIEncoding());
Then just read using StreamReader.
Writing is the same, just use StreamWriter.
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