WebNov 20, 2015 · We need to create a local dictionary and iterate over that collection. var myDictionary = new Dictionary (); IEnumerable myCollection = new List (); foreach (var item in myCollection) { // This might be fun if you get two of the same object in the collection. WebJun 27, 2024 · 1 Answer. Firstly, your Dapper query is not quite right: when using multi-mapping, the objects are split vertically in the resultset (some columns for the parent object, some for the child), and you need to provide the split points i.e. the starting columns for each object. Then you map each object into its nested location, depending on whether ...
How to turn dapper result into a dictionary using result mapping
WebSep 14, 2024 · This seems to point out a bug (or shortcoming) in the Dapper processing of parameters as Dictionary. It makes logical sense to me that I should be … WebJan 13, 2024 · It passes the mapped objects to the map function. Dapper maps the order columns to a new Order object for every row – which is why you need to de-dupe and keep track of unique Order objects with a Dictionary. This results in the following Order object with an array of OrderLine objects: gold white tree skirt
C# 使用Dapper中的参数执行存储过程_C#_Sql_Stored Procedures_Data Access Layer_Dapper ...
WebMar 21, 2024 · DapperRow happens to implement IDictionary. Therefore: In version 1 of your code you can cast the List directly to IEnumerable. Version 2 you are calling ToList, but because you haven't got the exact type, you end up with a call to ToList.WebMay 30, 2024 · The DapperRow object is designed to share a lot of state between rows. For example, if you fetch 40 rows, the column names etc are only stored once. If we used ExpandoObject, this would need to be configured per row. Hence, the use of DapperRow as the behind-the-scenes implementation detail is a deliberate efficiency thing.WebMap your query to model properties, select it to dictionary Dictionary dictionary = connection.Query (@" SELECT routine_name AS RoutineName, created AS Created, modified AS Modified FROM PROCEDURES ").ToDictionary (m => m.RoutineName, m => m); Share Improve this answer Follow answered Jun 8, 2015 at …WebC# Dapper QueryMultiple(多对多)中首次选择的访问结果,c#,.net,dapper,C#,.net,Dapper,我正在尝试将多对多关系映射到一个具有角色列表的用户 我试着回答这个问题,但它给了我多个用户,每个用户都有一个角色 相反,我尝试使用QueryMultiple语句。 WebC# 使用Dapper中的参数执行存储过程,c#,sql,stored-procedures,data-access-layer,dapper,C#,Sql,Stored Procedures,Data Access Layer,Dapper,我正在使用一个带有DAL的微型ORM(谢谢,很棒的项目),由于某种原因,我无法使用输入参数执行存储过程 在一个示例服务中,我有以下代码: public void GetSomething(int somethingId) { … WebMay 1, 2024 · 2 Answers Sorted by: 1 Would this meet your needs? var dict = connection.Query> (sql, (s, i) => ValueTuple.Create (s, i), null, null, true, "OrderID") .GroupBy (t => t.Item1, t => t.Item2, (k, v) => new {Key = k, List = v}) .ToDictionary (kv => kv.Key, kv => kv.List); Fiddle Share Improve this answer Follow gold white watch