c#完美截断字符串代码(中文+非中文)

代码如下: public static string Truncation(this HtmlHelper htmlHelper, string str, int len) { if (str == null || str.Length == 0 || len &lt;= 0) { return string.Empty; } int l = str.Length; #region 计算长度 int clen = 0; while (clen < len> 128) { len–; } cl