dapper

static async Task MySQLTransDemo() { try { using(dbConnection) { dbConnection.Open(); //The object matched type such as class must have the column fields in table List<object> objList = new List<object>(); //assign values to objList; //to-do //objList=GetObjList(); using(IDbTransaction trans=dbConnection.BeginTransaction()) { //match columns and values respectively. string transSQL = "insert into table_Name(column1,column2) values(@column1,@column2)"; //In this example,this objList collection's item object must have column1 and column2 properties. var transNum = await dbConnection.ExecuteAsync

What is the best way to write a query with IN clause using Dapper ORM when the list of values for the IN clause is coming from business logic? For example let's say I have a query: SELECT * FROM SomeTable WHERE id IN (commaSeparatedListOfIDs) The commaSeparatedListOfIDs is being passed in from business logic and it can be any type of IEnumerable(of Integer) . How would I construct a query in this case? Do I have to do what I've been doing so far which is basically string concatenation or is there some sort of advanced parameter mapping technique that I'm not aware of? LukeH Dapper supports

Does anyone know if is possible to pass table-valued parameter data to a stored procedure with Dapper? There is now (n Dapper 1.26 and higher) direct support for table-valued parameters baked into dapper. In the case of stored procedures, since the data type is built into the sproc API, all you need to do is supply a DataTable : var data = connection.Query<SomeType>(..., new { id=123, name="abc", values = someTable }, ...); For direct command-text you have two other options: use a helper method to tell it the custom data type: var data = connection.Query<SomeType>(..., new { id=123, name="abc"

I'm currently using Entity Framework for my db access but want to have a look at Dapper. I have classes like this: public class Course{ public string Title{get;set;} public IList<Location> Locations {get;set;} ... } public class Location{ public string Name {get;set;} ... } So one course can be taught at several locations. Entity Framework does the mapping for me so my Course object is populated with a list of locations. How would I go about this with Dapper, is it even possible or do I have to do it in several query steps? Sam Saffron Dapper is not a full blown ORM it does not handle magic

I've been playing around with this for a bit, because it seems like it feels a lot like the documented posts/users example , but its slightly different and isn't working for me. Assuming the following simplified setup (a contact has multiple phone numbers): public class Contact { public int ContactID { get; set; } public string ContactName { get; set; } public IEnumerable<Phone> Phones { get; set; } } public class Phone { public int PhoneId { get; set; } public int ContactID { get; set; } // foreign key public string Number { get; set; } public string Type { get; set; } public bool IsActive {

Is there any way to use Dapper.NET with stored procs that return multiple result sets? In my case, the first result set is a single row with a single column; if it's 0 then the call was successful, and the second result set will contain that actual rows/columns of data. (and if it was non-zero, an error occured and no second result set will be provided) Any chance to handle this with Dapper.NET? So far, I'm only ever getting back that single 0 - but nothing more. Update: OK, it works fine - as long as the result set no. 2 is a single entity: Dapper.SqlMapper.GridReader reader = _conn