How do I perform an insert and return inserted identity with Dapper?

Question

How do I perform an insert to database and return inserted identity with Dapper?

I\'ve tried something like this:

string sql = \"DECLARE @ID int; \"          


        

Answer 1

It does support input/output parameters (including RETURN value) if you use DynamicParameters, but in this case the simpler option is simply:

var id = connection.QuerySingle( @"
INSERT INTO [MyTable] ([Stuff]) VALUES (@Stuff);
SELECT CAST(SCOPE_IDENTITY() as int)", new { Stuff = mystuff});

Note that on more recent versions of SQL Server you can use the OUTPUT clause:

var id = connection.QuerySingle( @"
INSERT INTO [MyTable] ([Stuff])
OUTPUT INSERTED.Id
VALUES (@Stuff);", new { Stuff = mystuff});