关键词限制 - 字数太少的过滤

CallCenterCommon/CallCenter.Utility/KeywordSpliterHelper.cs

@@ -32,6 +32,7 @@ namespace CallCenter.Utility
         public static string DoGetKeyword(string keyText)
         {
             if (String.IsNullOrEmpty(keyText)) return "";
+            if (JudgementStr(keyText)) return "";
 
             LoadDict();
             LoadDictBaidu();
@@ -389,5 +390,52 @@ namespace CallCenter.Utility
         {
             return _StopWordsList.Contains(str);
         }
+
+        /// <summary>
+        ///  用正则表达式来验证字符串是否为数字字符串
+        /// </summary>
+        /// <param name="message"></param>
+        /// <param name="result"></param>
+        /// <returns></returns>
+        private static bool isNumberic(string message, out int result)
+        {
+            System.Text.RegularExpressions.Regex rex = new System.Text.RegularExpressions.Regex(@"^\d+$");
+            result = -1;
+            if (rex.IsMatch(message))
+            {
+                result = int.Parse(message);
+                return true;
+            }
+            else
+                return false;
+        }
+
+        /// <summary>
+        /// 字符串过滤
+        /// 1、纯数字大于4个数字
+        /// 2、不是纯数字大于2个字
+        /// </summary>
+        /// <param name="key"></param>
+        /// <returns></returns>
+        private static bool JudgementStr(string key)
+        {
+            bool b = false;
+            byte[] keyText2 = Encoding.Default.GetBytes(key);
+            int key_l = keyText2.Length;
+            int result = 0;
+            if (isNumberic(key, out result))
+            {
+                // 4个数字
+                if (key_l < 5)
+                    b = true;
+            }
+            else
+            {
+                // 2个字
+                if (key_l < 4)
+                    b = true;
+            }
+            return b;
+        }
     }
 }

CallCenterCommon/CallCenter.WebChatServer/KeywordSpliter.cs

@@ -32,6 +32,7 @@ namespace CallCenter.WebChatServer
         public static string DoGetKeyword(string keyText)
         {
             if (String.IsNullOrEmpty(keyText)) return "";
+            if (JudgementStr(keyText)) return "";
 
             LoadDict();
             LoadDictBaidu();
@@ -390,5 +391,52 @@ namespace CallCenter.WebChatServer
         {
             return _StopWordsList.Contains(str);
         }
+        
+        /// <summary>
+        ///  用正则表达式来验证字符串是否为数字字符串
+        /// </summary>
+        /// <param name="message"></param>
+        /// <param name="result"></param>
+        /// <returns></returns>
+        private static bool isNumberic(string message, out int result)
+        {
+            System.Text.RegularExpressions.Regex rex = new System.Text.RegularExpressions.Regex(@"^\d+$");
+            result = -1;
+            if (rex.IsMatch(message))
+            {
+                result = int.Parse(message);
+                return true;
+            }
+            else
+                return false;
+        }
+
+        /// <summary>
+        /// 字符串过滤
+        /// 1、纯数字大于4个数字
+        /// 2、不是纯数字大于2个字
+        /// </summary>
+        /// <param name="key"></param>
+        /// <returns></returns>
+        private static bool JudgementStr(string key)
+        {
+            bool b = false;
+            byte[] keyText2 = Encoding.Default.GetBytes(key);
+            int key_l = keyText2.Length;
+            int result = 0;
+            if (isNumberic(key, out result))
+            {
+                // 4个数字
+                if (key_l < 5)
+                    b = true;
+            }
+            else
+            {
+                // 2个字
+                if (key_l < 4)
+                    b = true;
+            }
+            return b;
+        }
     }
 }