过滤sql匹配符号 防止sql注入

        ///  <summary> /// 过滤sql中非法字符
         ///  </summary>
        ///  <param name="value">要过滤的字符串 </param>
        ///  <returns>string </returns>
        public static string Filter(string value)
        {
            if (string.IsNullOrEmpty(value)) return string.Empty;
            value = Regex.Replace(value, @";", string.Empty);
            value = Regex.Replace(value, @"'", string.Empty);
            value = Regex.Replace(value, @"&", string.Empty);
            value = Regex.Replace(value, @"%20", string.Empty);
            value = Regex.Replace(value, @"--", string.Empty);
            value = Regex.Replace(value, @"==", string.Empty);
            value = Regex.Replace(value, @" <", string.Empty);
            value = Regex.Replace(value, @">", string.Empty);
            value = Regex.Replace(value, @"%", string.Empty);

            return value;
        }