C#&Sql获取中文字符拼音首字母的方法

C#获取字符拼音首字母，可以存储在数据库中以备将来按字母搜索的需求。

public static string GetAc(string s)
{
try
{
string temp = Service.Text.Chinese2Spell.MakeSpellCode(s, Service.Text.SpellOptions.EnableUnicodeLetter).ToUpper();
if (temp.Length > )
return temp.Substring(, );
return temp;
}
catch
{
return "";
}
}

sql端进行处理

create function [dbo].[fn_ChineseToSpell](@strChinese varchar(500)='')
returns varchar(500)
as
begin /*函数实现开始*/
    declare @strLen int,@return varchar(500),@i int
    declare @n int,@c char(1),@chn nchar(1)
    select @strLen=len(@strChinese),@return='',@i=0
    while @i<@strLen
    begin /*while循环开始*/
            select @i=@i+1,@n=63,@chn=substring(@strChinese,@i,1)
            if @chn>'z'/*原理:“字符串排序以及ASCII码表”*/
                select @n = @n +1,@c =case chn when @chn then char(@n) else @c end from(select top 27 * from (select chn = '吖' union all select '八' union all select '嚓' union all select '咑' union all select '妸'  union all select '发'  union all select '旮'  union all select '铪'  union all select '丌' /*because have no 'i'*/ union all select '丌' union all select '咔' union all select '垃' union all select '嘸' union all select '拏' union all select '噢' union all select '妑' union all select '七' union all select '呥' union all select '仨' union all select '他' union all select '屲' /*no 'u'*/ union all select '屲' /*no 'v'*/ union all select '屲' union all select '夕' union all select '丫' union all select '帀' union all select @chn) as a  order by chn COLLATE Chinese_PRC_CI_AS ) as b
            else
                set @c=@chn
            set @return=@return+@c
    end /*while循环结束*/
    return(@return)
end /*函数实现结束*/
--调用
select dbo.[fn_ChineseToSpell]('你好')