c# - 为什么 HtmlEncode 不对这个字符进行编码？

Question

这是代码：

Response.Write("asd1 X : " + HttpUtility.HtmlEncode("×"));
Response.Write("asd2 X : " + HttpUtility.HtmlEncode("✖"));

第一个是：

asd1 X : × // OK, ENCODED AS HTML ENTITIES

第二个不，只是✖：

asd2 X : ✖

那是哪种字符？另外，如果我在这里尝试，结果是：

asd1 X : ×
asd2 X : ✖

什么？？为什么会有这种差异？

Answer 1

Answer 2

My best guest is that not all strings has a entity representation. The Heavy multiplication X is just one of the many that don't.

To elaborate Oded's link, HttpUtility.HtmlEncode only encodes characters in ISO 8859-1 (Latin-1). Since the Heavy Multiplication X is out of this range, the function doesn't handle it.

If you try Microsoft.Security.Application.AntiXss.HtmlEncode("✖");, you'll get the HTML entity in ✖.