请教：求字符长度的问题

[kwklover]

中文算一个字符，英文和数字两个算一个
按照这样的规则如何怎么求一个字符串的长度呢？

[saucer]

where are you doing the calculation?

on the server side, either you count it yourself, or use System.Text.Encoding.GetEncoding("GB2312")'s GetByteCount method, for example:

string s = "abc中d013";
int nChCount = 0, nNonChCount = 0;
for (int i=0; i < s.Length; i++)
{
int n = (int) s[i];
if (n >= 0x4e00 && n <= 0x9fa5)
nChCount++;
else
nNonChCount++;
}

int nTotalCount = nChCount + (nNonChCount+1)/2;
Console.WriteLine(nTotalCount);

int nByteCount = System.Text.Encoding.GetEncoding("GB2312").GetByteCount(s);
Console.WriteLine(nByteCount);
nTotalCount = (nByteCount+1)/2;
Console.WriteLine(nTotalCount);

on the client side, you can do similarly

<script>
function CountChars(s)
{
var nChCount = 0;
var nNonChCount = 0;

for (var i=0; i < s.length; i++)
if (s.charCodeAt(i) >= 0x4e00 && s.charCodeAt(i) <= 0x9fa5)
nChCount++;
else
nNonChCount++;

return nChCount + Math.ceil(nNonChCount/2);
}

var s = "abc中d013";
alert(CountChars(s));

//or
alert(Math.ceil(s.replace(/[\u4e00-\u9fa5]/g,"11").length/2));
</script>