my sql is :
select (select count(*) from TblRMember where sex=1) male, (select count(*) from TblRMember where sex=2) female, (select count(*) from TblRMember where sex=0) unkown
I want Dapper.Net to return a Dictinary like this:
I have see How to map to a Dictionary object from database results using Dapper Dot Net? ,but that can not work!
How to use ToDictionary or other way to implement I want
var myDictionary = sqlConnection.Query(strSql).ToDictionary(??);
First change your query to be single one:
select case when sex = 1 then 'male' when sex = 2 then 'female' when sex = 0 then 'unknown' end as sex, count(*) as cnt from TblRMember group by sex
as I see
sex is numerical, so you either have to select by coumn with name (sexname?) or change it in your code. After that:
var myDictionary = sqlConnection.Query(strSql) .ToDictionary(x => x.sex.ToString(), x => (int)x.cnt);
string strSql = "SELECT DISTINCT TableID AS [Key],TableName AS [Value] FROM dbo.TS_TStuctMaster"; Dictionary<string,string> dicts = sqlConnection.Query<KeyValuePair<string,string>>(strSql).ToDictionary(pair => pair.Key, pair => pair.Value);
You can use aliases and strong types.
Aliases are the key points, which match the attributes of KeyValuePair type Key and Value.
It works under strong typing and runs well.
I don't like dynamic type. It brings disaster in certain situations. Moreover, the boxing and unboxing brings performance loss.