asp.net 根据汉字的拼音首字母搜索数据库(附 LINQ 调用方法)

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: xoyozo
-- Create date: 2010-4-17
-- Description: 提供中文首字母
-- =============================================
CREATE FUNCTION fun_getPY
(
@str NVARCHAR(4000)
)
RETURNS NVARCHAR(4000)
AS
BEGIN
DECLARE @word NCHAR(1),@PY NVARCHAR(4000)
SET @PY=''
WHILE len(@str)>0
BEGIN
SET @word=left(@str,1)
SET @PY=@PY+(CASE WHEN unicode(@word) BETWEEN 19968 AND 19968+20901
THEN (SELECT TOP 1 PY FROM (
SELECT 'A' AS PY,N'' AS word
UNION ALL SELECT 'B',N'簿'
UNION ALL SELECT 'C',N'e'
UNION ALL SELECT 'D',N'z'
UNION ALL SELECT 'E',N''
UNION ALL SELECT 'F',N'v'
UNION ALL SELECT 'G',N'B'
UNION ALL SELECT 'H',N''
UNION ALL SELECT 'J',N'h'
UNION ALL SELECT 'K',N'i'
UNION ALL SELECT 'L',N'w'
UNION ALL SELECT 'M',N''
UNION ALL SELECT 'N',N''
UNION ALL SELECT 'O',N'a'
UNION ALL SELECT 'P',N'曝'
UNION ALL SELECT 'Q',N''
UNION ALL SELECT 'R',N'U'
UNION ALL SELECT 'S',N'R'
UNION ALL SELECT 'T',N'X'
UNION ALL SELECT 'W',N'F'
UNION ALL SELECT 'X',N'R'
UNION ALL SELECT 'Y',N''
UNION ALL SELECT 'Z',N''
) T
WHERE word>=@word COLLATE Chinese_PRC_CS_AS_KS_WS
ORDER BY PY ASC) ELSE @word END)
SET @str=right(@str,len(@str)-1)
END
RETURN @PY
END

select * from 表 where fun_getPY(字段) like N'%zgr%'

DataClasses1DataContext db = new DataClasses1DataContext();
var q = from d in db.Documents
where d.Title.Contains("zgr") || db.fun_getPY(d.Title).Contains("zgr")
select d;