拼音查询生成SQL条件的类

拼音查询生成SQL条件的类

 

public class SQLPingYing
    { 
        private static string[] startChars = {"啊", "芭", "擦","搭","蛾","发","噶","哈",
                                                 "击","击","喀","垃","妈","拿","哦","啪","期","然", "撒","塌","挖","挖","挖","昔","压","匝"}; 
        private static string[] endChars = {"澳", "怖", "错","堕","贰","咐","过","祸",
                                               "啊","骏","阔","络","穆","诺","沤","瀑","群","弱", "所","唾","啊","啊","误","迅","孕","座"}; 

        /**//// <summary> 
        /// 根据字符和对应的中文字符,转成SQL查询条件 
        /// </summary> 
        /// <param name="cChar">要转化的字符,[A-Z]</param> 
        /// <param name="strFieldName">条件左值</param> 
        /// <returns>SQL条件</returns> 
        /// <remarks> Sxf 2001-1-4 ***** JY 2002-1-4 </remarks> 
        public static string GetCharCondition(char cChar, string strFieldName) 
        { 
            string strWord; 
            int Index = (int)(char.ToUpper(cChar)) - (int)'A'; 
            if (Index >= 0 && Index < 26) 
                strWord = startChars[Index]; 
            else 
                strWord = startChars[0]; 
           
            //return string.Format("(({0}>='{1}' AND {0}<'[') OR ({0} >= '{3}' AND {0} < '{{') OR {0}>='{2}')",  
            //strFieldName, char.ToUpper(cChar), strWord, char.ToLower(cChar)); 
          
            return string.Format("(({0} >= '{3}' AND {0} <= 'zzzzzzzz') OR {0}>='{2}')",  
                strFieldName, char.ToUpper(cChar), strWord, char.ToLower(cChar)); 
        } 
        
        /**//// <summary> 
        /// 将指定字段值的每个字符分割，这样可以生成同音查询的SQL 
        /// </summary> 
        /// <param name="fieldName">字段名</param> 
        /// <param name="fieldValue">字段值</param> 
        /// <returns>生成的可以进行同音查询的SQL</returns> 
        public static string GetCharFullCondition(string fieldName, string fieldValue) 
        { 
            StringBuilder sql = new StringBuilder(1024); 
            int i = 1; 
            foreach (char c in fieldValue) 
            { 
                if (i > 1) 
                    sql.Append(" AND "); 
                int index = (int)(char.ToUpper(c)) - (int)'A'; 
                string startWord, endWord; 
                if (index >= 0 && index < 26) 
                { 
                    startWord = startChars[index]; 
                    endWord = endChars[index]; 
                } 
                else 
                { 
                    startWord = startChars[0]; 
                    endWord = endChars[0]; 
                } 
                string subStr = String.Format("SUBSTRING({0}, {1}, {2})", fieldName, i, 1); 
                sql.AppendFormat("({0} BETWEEN '{1}' AND '{2}')", subStr, startWord, endWord); 
                ++i; 
            } 

            return sql.ToString(); 
        } 
    }