#region 过滤非法字符 public static string encoding(string src) { if (src == null) return ""; StringBuilder result = new StringBuilder(); if (src != null) { src = src.Trim(); for (int pos = 0; pos < src.Length; pos++) { switch (src[pos]) { case '\"': result.Append("''"); break; case '<': result.Append("<"); break; case '>': result.Append(">"); break; case '\'': result.Append("'"); break; case '&': result.Append("&"); break; case '%': result.Append("&pc;"); break; case '_': result.Append("&ul;"); break; case '#': result.Append("&shap;"); break; case '?': result.Append("&ques;"); break; default: result.Append(src[pos]); break; } } } return result.ToString(); } #endregion