winform用户输入查询与拼音首字母的结合，提高用户的操作体验

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--> --
-- Definition for user-defined function f_GetPy :
--
GO
create    function    [ dbo ] .f_GetPy( @str    nvarchar ( 4000 ))
returns    nvarchar ( 4000 )
as
begin
declare    @strlen    int , @re    nvarchar ( 4000 )
declare    @t    table (chr   nchar ( 1 )   collate   Chinese_PRC_CI_AS,letter   nchar ( 1 ))
insert    into    @t (chr,letter)
    select    ' 吖 ' , ' A '    union    all    select    ' 八 ' , ' B '    union    all
    select    ' 嚓 ' , ' C '    union    all    select    ' 咑 ' , ' D '    union    all
    select    ' 妸 ' , ' E '    union    all    select    ' 发 ' , ' F '    union    all
    select    ' 旮 ' , ' G '    union    all    select    ' 铪 ' , ' H '    union    all
    select    ' 丌 ' , ' J '    union    all    select    ' 咔 ' , ' K '    union    all
    select    ' 垃 ' , ' L '    union    all    select    ' 嘸 ' , ' M '    union    all
    select    ' 拏 ' , ' N '    union    all    select    ' 噢 ' , ' O '    union    all
    select    ' 妑 ' , ' P '    union    all    select    ' 七 ' , ' Q '    union    all
    select    ' 呥 ' , ' R '    union    all    select    ' 仨 ' , ' S '    union    all
    select    ' 他 ' , ' T '    union    all    select    ' 屲 ' , ' W '    union    all
    select    ' 夕 ' , ' X '    union    all    select    ' 丫 ' , ' Y '    union    all
    select    ' 帀 ' , ' Z '
    select    @strlen = len ( @str ), @re = ' '
    while    @strlen > 0
    begin
        select    top    1    @re = letter + @re , @strlen = @strlen - 1
            from    @t    a   where    chr <= substring ( @str , @strlen , 1 )
            order    by    chr   desc
        if    @@rowcount = 0
            select    @re = substring ( @str , @strlen , 1 ) + @re , @strlen = @strlen - 1
    end
    return ( @re )
end

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--> CREATE OR REPLACE FUNCTION F_PINYIN(P_NAME IN VARCHAR2 ) RETURN VARCHAR2 AS
     V_COMPARE VARCHAR2 ( 100 );
     V_RETURN VARCHAR2 ( 4000 );

     FUNCTION F_NLSSORT(P_WORD IN VARCHAR2 ) RETURN VARCHAR2 AS
     BEGIN
      RETURN NLSSORT(P_WORD, ' NLS_SORT=SCHINESE_PINYIN_M ' );
     END ;
    BEGIN

    FOR I IN 1 ..NVL(LENGTH(P_NAME), 0 ) LOOP
     V_COMPARE : = F_NLSSORT(SUBSTR(P_NAME, I, 1 ));
     IF V_COMPARE >= F_NLSSORT( ' 吖 ' ) AND V_COMPARE <= F_NLSSORT( ' 驁 ' ) THEN
      V_RETURN : = V_RETURN || ' A ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 八 ' ) AND V_COMPARE <= F_NLSSORT( ' 簿 ' ) THEN
      V_RETURN : = V_RETURN || ' B ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 嚓 ' ) AND V_COMPARE <= F_NLSSORT( ' 錯 ' ) THEN
      V_RETURN : = V_RETURN || ' C ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 咑 ' ) AND V_COMPARE <= F_NLSSORT( ' 鵽 ' ) THEN
      V_RETURN : = V_RETURN || ' D ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 妸 ' ) AND V_COMPARE <= F_NLSSORT( ' 樲 ' ) THEN
      V_RETURN : = V_RETURN || ' E ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 发 ' ) AND V_COMPARE <= F_NLSSORT( ' 猤 ' ) THEN
      V_RETURN : = V_RETURN || ' F ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 旮 ' ) AND V_COMPARE <= F_NLSSORT( ' 腂 ' ) THEN
      V_RETURN : = V_RETURN || ' G ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 妎 ' ) AND V_COMPARE <= F_NLSSORT( ' 夻 ' ) THEN
      V_RETURN : = V_RETURN || ' H ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 丌 ' ) AND V_COMPARE <= F_NLSSORT( ' 攈 ' ) THEN
      V_RETURN : = V_RETURN || ' J ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 咔 ' ) AND V_COMPARE <= F_NLSSORT( ' 穒 ' ) THEN
      V_RETURN : = V_RETURN || ' K ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 垃 ' ) AND V_COMPARE <= F_NLSSORT( ' 擽 ' ) THEN
      V_RETURN : = V_RETURN || ' L ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 嘸 ' ) AND V_COMPARE <= F_NLSSORT( ' 椧 ' ) THEN
      V_RETURN : = V_RETURN || ' M ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 拏 ' ) AND V_COMPARE <= F_NLSSORT( ' 瘧 ' ) THEN
      V_RETURN : = V_RETURN || ' N ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 筽 ' ) AND V_COMPARE <= F_NLSSORT( ' 漚 ' ) THEN
      V_RETURN : = V_RETURN || ' O ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 妑 ' ) AND V_COMPARE <= F_NLSSORT( ' 曝 ' ) THEN
      V_RETURN : = V_RETURN || ' P ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 七 ' ) AND V_COMPARE <= F_NLSSORT( ' 裠 ' ) THEN
      V_RETURN : = V_RETURN || ' Q ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 亽 ' ) AND V_COMPARE <= F_NLSSORT( ' 鶸 ' ) THEN
      V_RETURN : = V_RETURN || ' R ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 仨 ' ) AND V_COMPARE <= F_NLSSORT( ' 蜶 ' ) THEN
      V_RETURN : = V_RETURN || ' S ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 侤 ' ) AND V_COMPARE <= F_NLSSORT( ' 籜 ' ) THEN
      V_RETURN : = V_RETURN || ' T ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 屲 ' ) AND V_COMPARE <= F_NLSSORT( ' 鶩 ' ) THEN
      V_RETURN : = V_RETURN || ' W ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 夕 ' ) AND V_COMPARE <= F_NLSSORT( ' 鑂 ' ) THEN
      V_RETURN : = V_RETURN || ' X ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 丫 ' ) AND V_COMPARE <= F_NLSSORT( ' 韻 ' ) THEN
      V_RETURN : = V_RETURN || ' Y ' ;
     ELSIF V_COMPARE >= F_NLSSORT( ' 帀 ' ) AND V_COMPARE <= F_NLSSORT( ' 咗 ' ) THEN
      V_RETURN : = V_RETURN || ' Z ' ;
     END IF ;
    END LOOP;
    RETURN V_RETURN;
   END ;

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-->         /// <summary>
        /// 根据商品名称获取商品列表
        /// </summary>
        /// <param name="goodsType"> 商品类型 </param>
        /// <returns></returns>
        public List < GoodsInfo > FindByName( string goodsName)
        {
            string sql = string .Format( " Name like '%{0}%' or dbo.f_GetPy(Name) like '{0}%' " , goodsName);
            return this .Find(sql);
        }