有效字符 [英] Valid Characters
问题描述
我正在努力确保我的XML文档中的所有字符都是
字符在本文档中指定：
http://www.w3.org/TR/2000/REC-xml-20001006#charsets
像这样的函数会起作用吗：
私有静态字符串格式XMLString（字符串n）
{
if（string.IsNullOrEmpty（n））返回n;
System.Text.StringBuilder sb = new System.Text.StringBuilder（）;
char [] chrs = n.ToCharArray（）;
char c;
int x，j = chrs.Length;
for（x = 0; x< j; x ++）
{
c = chrs [x];
if（c == 0x9 || c == 0xA || c == 0xD ||
（c 0x20& c< 0xd7ff）||
（c 0xe000&& c< ; 0xffd）||
（c 0x10000&& c< 0x10ffff））
{
sb.Append（c）;
}
}
返回sb.ToString（ ）;
}
我从来没有把字符比作这样（0x9，0xffd等等）？
我不是想偷懒而不是自己测试，我只是不知道这个
类型的字符比较是否是结果的正确逻辑我是
寻找。
任何输入？
I''m trying to ensure that all the characters in my XML document are
characters specified in this document:
http://www.w3.org/TR/2000/REC-xml-20001006#charsets
Would a function like this work:
private static string formatXMLString(string n)
{
if (string.IsNullOrEmpty(n)) return n;
System.Text.StringBuilder sb = new System.Text.StringBuilder();
char[] chrs = n.ToCharArray();
char c;
int x, j = chrs.Length;
for (x = 0; x < j; x++)
{
c = chrs[x];
if (c == 0x9 || c == 0xA || c == 0xD ||
(c 0x20 && c < 0xd7ff) ||
(c 0xe000 && c < 0xffd) ||
(c 0x10000 && c < 0x10ffff))
{
sb.Append(c);
}
}
return sb.ToString();
}
I''ve never compared characters to like this (0x9, 0xffd, etc...)?
I''m not trying to be lazy and not test it myself, I just don''t know if this
type of character comparison is the correct logic for the results I''m
looking for.
Any input?
推荐答案
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我正在努力确保我的XML文档中的所有字符都是
本文档中指定的字符：
< a rel =nofollowhref =http://www.w3.org/TR/2000/REC-xml-20001006#charsets\"target =_ blank> http://www.w3.org/TR/2000 / REC-xml-20001006 #charsets
像这样的函数会工作吗：
私有静态字符串格式XMLString（字符串n ）
{
if（string.IsNullOrEmpty（n））return n;
System.Text.StringBuilder sb = new System.Text。 StringBuilder（）;
char [] chrs = n.ToCharArray（）;
char c;
int x，j = chrs.Length ;
for（x = 0; x< j; x ++）
{
c = chrs [x];
if（c == 0x9 || c == 0xA || c == 0xD ||
（c 0x20&& c< 0xd7ff）||
（c 0xe000&& c< 0xffd）||
（c 0x10000&& c< 0x10ffff））
{
sb.Append（c）;
}
}
返回sb。 ToString（）;
}
我从来没有把字符比作这样（0x9,0xffd等......）？
我不是想偷懒而不是自己测试，我只是不知道是否
这种类型的字符比较是结果的正确逻辑我'' m
正在寻找。
有什么输入？
I''m trying to ensure that all the characters in my XML document are
characters specified in this document:
http://www.w3.org/TR/2000/REC-xml-20001006#charsets
Would a function like this work:
private static string formatXMLString(string n)
{
if (string.IsNullOrEmpty(n)) return n;
System.Text.StringBuilder sb = new System.Text.StringBuilder();
char[] chrs = n.ToCharArray();
char c;
int x, j = chrs.Length;
for (x = 0; x < j; x++)
{
c = chrs[x];
if (c == 0x9 || c == 0xA || c == 0xD ||
(c 0x20 && c < 0xd7ff) ||
(c 0xe000 && c < 0xffd) ||
(c 0x10000 && c < 0x10ffff))
{
sb.Append(c);
}
}
return sb.ToString();
}
I''ve never compared characters to like this (0x9, 0xffd, etc...)?
I''m not trying to be lazy and not test it myself, I just don''t know if
this type of character comparison is the correct logic for the results I''m
looking for.
Any input?
当然。不要偷懒。
char是一个2字节的类型，因此你的文字都应该是2字节的文字，
并且应该为了比较而被转换为char。
例如
char space =（char）0x0020;
David
Sure. Don''t be lazy.
And a char is a 2-byte type, so your literals should all be 2-byte literals,
and should be cast to char for comparison.
eg
char space = (char)0x0020;
David
您好，
数据类型char在C＃中用于16位Unicode字符，其范围
从U + 0000到U + ffff。因此，您的代码中可能不需要以下行：
（c 0x10000&& c< 0x10ffff））
它超出了C＃char的范围，我们不会在
C＃应用程序中获得这样的价值。
当将字符串或文件加载到XMLDocument元素中时，字符将有效，并且如果存在任何无效的字符，则会抛出异常。
您的函数将检查字符串在这之前。我认为这是一个很好的方式
，因为你可以控制验证。无论如何，如果您删除无效的字符，是否有可能丢失某些数据？b
？怎么样抛出
例外？
真诚的，
Luke Zhang
Microsoft在线社区支持
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Hello,
The data type "char" in C# is for 16-bit Unicode character, and its range
is from U+0000 to U+ffff. Therefore, the following line may be not
necessary in your code:
(c 0x10000 && c < 0x10ffff))
It has been beyond the range of C# char, and we won''t get such a value in
C# application.
When load strings or file into XMLDocument element, the charactors will be
valid and exceptions will be thrown if there is any invalid charactors.
Your function will check the string before this. I think this is a good way
since you can control the validation. Anyway, is it possible that some data
will be lost if you just remove the invalid charactors? How about throw an
exception?
Sincerely,
Luke Zhang
Microsoft Online Community Support
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数据类型char在C＃中是16位Unicode字符，其范围
The data type "char" in C# is for 16-bit Unicode character, and its range
是从U + 0000到U + ffff。因此，您的代码中可能不需要以下行：
（c 0x10000&& c< 0x10ffff））
它超出了C＃char的范围，我们不会在
C＃应用程序中获得这样的价值。
is from U+0000 to U+ffff. Therefore, the following line may be not
necessary in your code:
(c 0x10000 && c < 0x10ffff))
It has been beyond the range of C# char, and we won''t get such a value in
C# application.
C＃使用UTF-16，因此它可以使用
代理来覆盖所有Unicode范围（最多U + 10FFFF）。
请参阅 http：// www。 unicode.org/faq/utf_bom.html#UTF16
和 http://mailman.ic.ac.uk/pipermail/xm...er/014933.html
-
Mihai Nita [微软MVP，Windows - SDK]
http://www.mihai-nita.net
-------------------- ----------------------
将_year_替换为_以获取真实的电子邮件
C# uses UTF-16, so it can cover all Unicode range (up to U+10FFFF) using
surrogates.
See http://www.unicode.org/faq/utf_bom.html#UTF16
and http://mailman.ic.ac.uk/pipermail/xm...er/014933.html
--
Mihai Nita [Microsoft MVP, Windows - SDK]
http://www.mihai-nita.net
------------------------------------------
Replace _year_ with _ to get the real email
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